KR101320065B1 - Wastewater treatment system for batch reactor equipped with odor disposal means - Google Patents

Abstract

The present invention relates to a batch biological water treatment system having a concentrated selective and efficient odor collecting means. In particular, the present invention introduces a concentrated selective odor collecting means including a cover covering the upper part of a reactor to which the aeration and aeration steps are repeatedly applied. In the step, more specifically, the odor gas collection is carried out in the initial stage of abandonment, and thus, the concentration of the odor is collected. Thus, most of the odor can be collected by a simple facility.
A batch biological water treatment system having a concentrated selective odor collecting means according to the present invention includes a reaction tank to which aeration and aeration steps are repeatedly applied; Concentration-selective odor collecting means comprising a cover for covering the reaction tank top; but is made, characterized in that the odor gas collection is made in the aeration step.

Description

WASTEWATER TREATMENT SYSTEM FOR BATCH REACTOR EQUIPPED WITH ODOR DISPOSAL MEANS

The present invention relates to a batch biological water treatment system having a concentrated selective and efficient odor collecting means,

In particular, the intensive selective odor collecting means including a cover covering the upper part of the reaction tank to which the aeration step and the aeration step are repeatedly applied, and the odor gas collection in the aeration step, more specifically the initial aeration step, are carried out to perform the intensive concentration treatment of the odor. The present invention relates to a biological water treatment system that can be implemented by collecting most of the odors with a simple facility and thus greatly improving efficiency.

The initial retrofitting of existing sewage treatment plants and treatment facilities was carried out when the flow rate did not increase or the flow rate did not increase beyond the design capacity, but the total pollutant inflow increased, resulting in failure to obtain water quality that meets the emission standards. After the current eutrophication of the eutrophication in the appeal and the sea, the pollution of the water supply and the destruction of the ecosystem caused a great impact on the natural environment, the existing treatment plant was improved and supplemented to introduce a process for removing nutrients.

In particular, in the case of sewage treatment plants, various methods and methods have been proposed to add new processes or supplement existing processes in the current process to treat nutrients such as nitrogen and phosphorus. The Biological Nutrient Removal (BNR) process, which has been developed since the 1980s, has been commercialized and applied in the field with various methods that are highly diversified and subdivided according to the treatment target and purpose. Commercialized BNR Given the conditions of a given plant, it is possible to select not only commercially available co-operatives but also treatment processes that meet the emission standards.

The generalized BNR process is divided into floating growth process and adhesion growth process according to the growth state of microorganisms, and the floating growth process is a process of removing organic matter and nitrogen by flowing and freely moving by the air flow supplied with microorganisms in the reactor. It is an activated sludge process designed to remove nutrients and nutrients at the same time.It is a continuous flow single sludge system, a continuous flow multiple sludge system, and a batch process depending on the type of sludge and the treatment state of the treatment plant. Divided by.

Adhesion growth process is to maintain the microbial amount necessary for removing the biological organic matter and nutrients in the reaction tank by attaching the microorganism to the carrier or media made of microorganisms in various forms and materials. The deposition growth process is classified not only by media type, shape and filling method, but also by process type depending on whether the media is fluid or stationary and filled with 60% or more of the effective volume of the reactor. Representative deposition growth processes include sprinkling water phase, RBC, fluidized bed, and fixed bed reactors, and the existing treatment sludge process can be converted to nutrient removal process to operate the existing treatment plant according to the operating conditions, shape, and process arrangement of each reactor. In addition, it is possible to obtain benefits such as increasing treatment capacity and ensuring stable treatment water quality depending on the type of medium, filling rate, and specific surface area.

Although various types of BNR processes have been developed and applied to the site as described above, there is a need to optimize each process according to the characteristics of the object to be treated and the required water quality. Particularly, in the case of applying domestic technology by introducing foreign technology rather than domestically developed technology, macroscopic environmental condition and operating condition are not a problem, but the treatment water quality and process efficiency are determined according to the microscopic environment and operation condition. As such, it is necessary to improve and supplement existing plants in various forms or approaches.

The Biological Nutrient Removal (BNR) process, which can be selected according to the quality of treatment, can be divided into nitrogen removal, simultaneous removal of nitrogen and phosphorus, and phosphorus removal.

Biological Nutrient Removal (BNR) has been developed in various ways to remove nitrogen and phosphorus. In general, these processes have the following points in common:

○ It is divided into anaerobic tank and anaerobic tank according to circulation of aerobic tank and nitrate nitrogen.

○ There is a tank that releases phosphorus. As an anaerobic tank free of dissolved oxygen and nitrate nitrogen, influent, carbon sources, or volatile fatty acids such as acetic acid should be present.

○ There is nitrification / denitrification tank. The nitric oxide is returned in various ways.

The key to optimizing these processes is to stabilize the phosphorus release by providing internal and external carbon sources and creating anaerobic conditions.

In the existing activated sludge process, that is, biological water treatment process, 10-30% of nitrogen and 10-25% of phosphorus can be removed.Modified Ludzac-Ettinger (MLE) can remove 80% of nitrogen in sewage. Process, A2 / O process, UCT and VIP. Simultaneous removal of nitrogen and phosphorus can be done using the Modified Bardenpho process, the A2 / O process with an additional denitrification filter, and the UCT process. Particularly, in order to remove more than 80% of phosphorus, coagulation removal using the Phostrip process has been suggested as the most reliable method. For example, if you want to remove more than 85% of nitrogen, you can choose the four-stage Bardenpho process as the BNR process. If you want to remove phosphorus, you can remove nitrogen and phosphorus simultaneously by adding chemical flocculation sedimentation process.

On the other hand, the batch biological water treatment method, which can be said to correspond to the continuous biological water treatment method described above, is an intermittent inflow continuous batch reactor represented by SBR (Sequencing Batch Reactor) according to the inflow method, and the Intermittent Cycle Extended ICEAS. It can be classified as a continuous inflow batch reactor represented by Aeration System.

An anoxic / aerobic (AAA) system, which is applied to continuous biological water treatment processes and includes intermittent aeration tanks, simply turns ON / OFF the aeration device for different reactions. By turning OFF, the other environments required for nitrification (aerobic) / denitrification (oxygen free), phosphorus release (oxygen free) / phosphorus excess intake (aerobic) are continuously created in one reactor. During abandonment, the incoming ammonia is nitrified by an autotrophic microorganism (nitrification microorganism). In the subsequent aeration period, the resulting nitrate is denitrated with nitrogen gas in the presence of the incoming organic carbon.

Batch biological water treatment has the advantage of low initial investment because the reaction and precipitation occur in one reactor at the same time.

Generally, wastewater such as domestic wastewater, livestock wastewater, commercial wastewater, and septic tank wastewater contains high concentrations of organic substances and high concentrations of nitrogen and phosphorus. Therefore, organic matter, nitrogen, phosphorus in accordance with environmental standards to prevent eutrophication of nearby streams are prevented. The standard value is regulated to remove the back, etc., and it is regulated by the law.

In order to purify various sewage, wastewater and sewage, various biological water treatment facilities using continuous biological water treatment or batch biological water treatment are installed and operated, in which odors are generated in various reactors. It is necessary to ensure that no gas is released into the atmosphere.

In particular, techniques related to the capture of odor generated in various reactors

Patent Registration No.0975301 (Aug. 05, 2010) of Exen Co., Ltd. is a biofilter-integrated deodorization cover device for preventing odor of sewage water treatment plant. This patent is for concentration tank, sedimentation tank, storage tank, etc. of sewage treatment plant. In order to prevent the spread of odors, the microorganism deodorizer having odor decomposition function is integrally installed in the same odor generating facility. The present invention relates to a functional deodorizing cover device capable of controlling biological deodorization and odor control while preventing diffusion.

In addition, there is Patent Publication No. 2009-0127852 (published December 14, 2009) of BB Techno Co., Ltd. [Residual odor removing device of livestock manure treatment equipment], the published patent is processed by using various additives or by fermentation It is to solve the problem by discharging the treated wastewater due to the odor remaining in the stream immediately and discharging roughly by discharging the whole amount due to the excessive capacity in the treatment through the filtration device. It is to provide a residual odor removal device that can be additionally installed in facilities (both already installed and newly established) to promote effective fermentation activation.

In addition, Baekgu Engineering Co., Ltd. has registered patent No. 0949132 (Registration date March 16, 2010) [Odor emission system of composting facility using by-products such as livestock manure], the registered patent is a roof that will rise on the roof of the composting facility Form a trapped odor trapping space by tunnel type, install a duct in the trapping space to discharge the collected odor, and separate the severe odor by the winch curtain to be configured to discharge the natural circulation air from the rest, It is related to the odor emission system of the composting facility using by-products, such as livestock manure, which is configured to remove the dust inside the rising roof in the after-care facilities where the odor is hardly generated.

In addition, there is a utility model registration No. 0446050 (registration date September 11, 2009) of Kim Tae-Hyun (registered date of September 11, 2009) [detoxification deodorant device], the registration proposal is a livestock barn, septic tank attached to the barn, and fermentation drying plant for fermentation drying treatment of livestock manure. Exhaust the nasty odors generated from the cattle manure odor generating facilities, and by deodorizing by effective water spraying and deodorization by scoria and charcoal filtering, only the purified air can be released to the air. The present invention relates to a livestock manure odor removal device that can be easily distributed to small livestock farms and help a lot as it can be easily implemented and implemented at a cost.

However, they all cover the entire tank with a roof and then collect or treat odors.

This is the same in the patent registration No.0556338 (February 23, 2006) of the Kukkuk University (Deodorization apparatus and method in sewage / wastewater treatment plant), that is, the registered patent is a sewage / wastewater treatment plant It collects odorous substances generated from wastewater storage tanks and aeration tanks of the wastewater and irradiates electron beams to the odors to directly reintroduce odor decomposition and ozone water to help treatment of wastewater, or to remove gases generating odorous substances. The present invention relates to a device for removing odors and a method thereof in a wastewater treatment plant.

As such, in the conventional biological water treatment facilities, roof-like covers are installed in various reactors as much as possible, pipes and pumps are installed on the covers, and the odor is only buried in the method of collecting and treating odors.

This non-selective, nondiscriminatory, and unplanned approach would theoretically be able to completely reduce odors and reduce the aversion and damage caused by odors, but in reality, roofs and covers are installed on all reactors, both new and existing. This is impossible in terms of cost or operation and management of water treatment facilities, and it is difficult to apply in practice.

In other words, simply covering each reaction tank of each process, collecting air in the cover and treating it in the odor treatment facility such as a biofilter is because the amount of air collected in the reaction tanks of each process is too large and a large blower at the rear stage And biofilters. This in turn puts an economic burden on operators.

On the other hand, there are soil deodorization method, adsorption method, microbial treatment method, biofilter method, general cleaning method and the like as the treatment method of odor generated in the conventionally known biological water treatment facility and the like, each of which has advantages and disadvantages.

For example, the chemical liquid cleaning method has the advantage of being suitable for the treatment of water-soluble odorous substances, inexpensive installation cost, and dust treatment. The chemical cleaning method determines the efficiency according to the replacement cycle of purified water. However, there is a disadvantage in that the treatment water cost is generated and the water-insoluble odor treatment is difficult.

In addition, the biofilter method has a low maintenance cost and shows very high processing efficiency for some materials. However, there are disadvantages in that the installation area is large and the biological treatment of the material is difficult.

The adsorption method can handle most odorous substances and the efficiency is determined by the replacement cycle of the adsorbent. However, there is a problem that the cost of activated carbon replacement and excessive cost in the treatment of high concentration odor.

As a technology for efficiently treating various odors, that is, gas pollutants, Patent Registration No. 0930987 (December 7, 2009) [Integrated odor treatment apparatus using a highly efficient deodorizing combination scrubber system with an ozone generator] there is,

The registered patent relates to an integrated odor treatment apparatus using a high-efficiency deodorizing combination scrubber system with an ozone generating unit capable of simultaneously ozone oxidation, wet cleaning, and adsorption by providing an ozone generator in the odor treatment apparatus. The integrated odor treatment device using the built-in high-efficiency deodorizing combination scrubber system is a odor treatment device consisting of a charging part, a wet treatment part, a mist removal part, and an adsorption treatment part, which is located above the mist removal part and oxidizes the odor introduced into the odor inlet. While supplying ozone for the purpose, there is a technical feature to further include an ozone generator for using the heat emitted when ozone generation in the ozone discharge tube to lower the relative humidity contained in the odor passed through the wet treatment.

Patent registration No. 1005636 (December 27, 2010) [Purification system for removing harmful gases and mixed odor using an underwater plasma generator] efficiently connects and integrates an underwater plasma technology and a wet scrubber type cleaning device. The present invention relates to a purification system for removing harmful gases and mixed odors using an underwater plasma to efficiently purify a large amount of harmful gases and mixed odors.

However, they all have effective odor monitoring and treatment systems through efficient treatment methods, facility costs, maintenance cost reduction methods, emission standards, and comprehensive odor control systems. There are many shortcomings to implement.

Therefore, the present invention is applied to a batch biological water treatment method, in particular, when applied to a water treatment system to apply an anoxic / aerobic (AAA: alternative anoxic aerobic, hereinafter abbreviated as 'AAA') method batchwise (batch) In the concentrated selective odor collecting means for biological water treatment system (especially AAA water treatment system), it includes a cover covering the upper part of the reactor, and the odor gas is collected at the aeration stage so that it is also selective and concentrated. It is an object of the present invention to provide a biological water treatment system in which most of the odor can be collected and greatly improved in efficiency.

Furthermore, the present invention is to implement an active odor monitoring and treatment system through efficient treatment method or facility cost according to the type and concentration of odor, the method of lowering maintenance cost, meeting the legal standards of emission gas, and implementing a comprehensive odor control system. It is aimed at incorporating suitable odor treatment means into this biological water treatment system.

In another aspect, the present invention is to hybridize the chemical liquid cleaning processing unit, the biofilter unit, the adsorption treatment unit to complement each disadvantage and maximize the advantages, and various sensors such as TRS (Total Reduced Sulfur) sensor in each inlet and outlet And control unit (especially central control center type) through communication network to implement odor control system to effectively block odors, collect and process odors, purify with clean air and discharge to outside It aims to provide a odor treatment means equipped with odor active monitoring function to maintain the environment, comply with emission standards set by the odor prevention law, and to reduce civil odor complaints to public facilities.

Furthermore, the present invention is suitable for the dust treatment included in the initial odor treatment, suitable for the treatment of water-soluble odorous substances, the chemical liquid cleaning process is adopted by employing a chemical solution cleaning method that is inexpensive installation cost and relatively low maintenance cost, remove alkaline and acid odor It is composed of acid washing tower and basic washing tower for the purpose, and it is configured to adjust the flow rate, time, etc. of acid and base (or spraying or spraying) according to the state of odor detected through the sensor. An object of the present invention is to provide a significantly increased odor treatment means.

In addition, the present invention provides a odor treatment means for the introduction of the regeneration stirring means to further reduce the operating cost as well as to maintain the cleaning treatment efficiency by increasing the replacement cycle by removing the contaminants of the chemical liquid cleaning unit, that is, media. It aims to provide.

Biological water treatment system having a concentrated selective odor collecting means according to the present invention in order to achieve the above object

A reactor in which the aeration and aeration phases are repeatedly applied;

A concentrated selective odor collecting means comprising a lid covering the reactor top;

, ≪ / RTI >

Odor gas collection takes place in the abandonment stage, forming a batch biological water treatment system.

In the batch biological water treatment system according to the present invention

Odor gas collection is preferably 120 minutes for the initial stage of abandonment, limited to 100 minutes, 80 minutes to the limit, even more limited to 60 minutes, more preferably, odor gas collection may proceed for the first 40 minutes of the abandonment stage. More preferably, the odor gas collection is preferably carried out for the first 30 minutes of the abandonment stage.

On the other hand, the odor treatment means having a odor active monitoring function introduced into the biological water treatment system having a concentrated selective odor collecting means according to the present invention

Chemical liquid cleaning processing unit having an odor detection sensor in the inlet or outlet, or both;

A biofilter unit having an odor detection sensor at an inlet or an outlet, or both; And

A controller for controlling the spray chemical liquid type, flow rate, and time of the chemical liquid cleaning processing unit according to the state of the malodor source detected by the malodor detection sensor;

.

In the odor processing means equipped with the odor active monitoring function

Further comprising an adsorption treatment unit having an odor detection sensor at the inlet or outlet, or both,

Odor detection sensor provided in the inlet or outlet, or both of the adsorption treatment unit is a TRS sensor or a weather sensor, or both,

Odor detection sensor provided in the inlet or outlet, or both of the chemical liquid cleaning unit is preferably a TRS sensor or a pH sensor, or both.

The biological water treatment system according to the present invention is applied to a water treatment system to which a batch biological water treatment method, in particular, an anoxic / aerobic (AAA) alternative method, is used. The concentrated selective malodor capture means for batch biological water treatment systems (especially AAA water treatment systems) includes a lid covering the top of the reactor, and also the selective and concentrated concentration of malodorous gas at the aeration stage, resulting in a simplified malodor. Most of the odor can be collected by installing the collecting means, so the efficiency is greatly improved.

Due to the odor treatment means equipped with the odor active monitoring function introduced in the present invention, an effective treatment method or facility cost according to the type and concentration of odor, a method of lowering maintenance costs, meeting the legal standards of exhaust gas, and a comprehensive odor control system It is suitable to implement odor active monitoring and processing system through implementation, and mixed chemical liquid cleaning processing unit, bio filter unit, and adsorption processing unit to compensate each disadvantage and maximize the advantages, and various sensors are installed at each inlet and Various sensors such as TRS (Total Reduced Sulfur) sensors are arranged at the discharge port, and a control unit (especially a central control center type) is configured through a communication network to implement a odor control system to effectively block odors, collect and process the air, and then clean air. By purifying with air and discharging it to the outside to maintain pleasant working environment indoors It complies with the emission standards set by law, and can reduce civil odor complaints to public facilities, and is also suitable for dust treatment included in the initial odor, suitable for water-soluble odorous substances, low installation cost, and relatively low maintenance cost. Basically, chemical cleaning process consists of acid cleaning tower and basic cleaning tower to remove alkaline and acid odors.The acid and base are added according to the state of odor detected through sensor. It can be configured to control spraying and spraying flow rate, time, etc. to drastically increase the operating efficiency of the system, and also to introduce a regeneration stirring means in the chemical liquid cleaning process to remove contamination of the filling body, ie media, and increase the replacement cycle. In addition to reducing costs, cleaning efficiency can also be maintained.

1A is a schematic diagram of an AAA process system applying the concept of a biological water treatment system having a concentrated selective malodor collection means according to the present invention;
Figure 1b is a graph comparing the TRS release amount for the anaerobic phase and aeration (aeration) phase over time in the AAA activated sludge system.
2 is a conceptual block diagram of a malodor treatment means equipped with a malodor active monitoring function utilized after the malodor collection of the biological water treatment system according to the present invention.
3 is a concrete block diagram of a malodor processing means equipped with a malodor active monitoring function.
4 is a conceptual diagram of a malodor control system based on malodor processing means.
5 is a schematic view of a chemical cleaning unit.
6 is a schematic view of the biofilter unit.
7 is a schematic view of an adsorption unit.
8 is a graph showing an appropriate applied treatment technology for each odor concentration and treatment flow rate.
9 is a schematic perspective view of the regeneration stirring means introduced into the chemical liquid cleaning processing unit.
10 is a graph showing the relationship between the odor index calculated by each sewage treatment plant and the complex odor.
11 is an example of a monitoring screen appearing on the control PC provided in the central control center in which the control unit of the malodor processing means is implemented.
12 is an example of a data inquiry display screen shown on the control PC of the malodor processing means.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

The present invention may be modified in various ways and may have various forms, and thus embodiments (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific form disclosed, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In addition, in the drawings, the components are exaggerated in size (or thickness), in size (or thickness), in size (or thickness), or in a simplified form or simplified in view of convenience of understanding. It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

As can be seen in the schematic diagram of the AAA process system of Figure 1a, the batch biological water treatment system with the concentrated selective malodor collection means according to the present invention can be applied to the reaction tank (T1) to which the aeration and aeration steps are repeatedly applied. In particular, the reactor can be operated according to the AAA method.

The concentrated selective odor collecting means which is the core of the present invention includes a cover C covering the upper part of the reaction tank T1.

Although the specific configuration is omitted, in addition to the reaction tank (T1) equipped with a diffuser and a stirrer in Figure 1a

A storage tank (T0) (input tank) having a stirrer is provided in front of the reaction tank (also determines the front-rear direction according to the flow order of the wastewater to be treated), and a settling tank (T2) (Clarifier) is provided at the rear, and sludge Return Activated Sludge is provided.

According to the operating characteristics of the batch biological water treatment system, especially the batch biological water treatment system using the AAA method, the main reactor T1 is repeatedly subjected to the aeration stage and the aeration stage.

This is controlled by the on / off control of the air diffuser, and as can be seen in the following experimental results, since the odorous substance is rapidly released into the air when the aeration is started, the air in the upper part of the reactor is collected for a certain time after the aeration is started. When sent to the odor treatment facility can be effectively treated odorous substances. The same applies to all other processes where the aeration device repeats on and off.

The results show that the amount of odorous substances contained in the air collected by the first 30 minutes after the start of the aeration phase is 54% of the total amount of odorous substances released in one cycle of aeration.

For more reliable odor capture and treatment, and considering the circumstances of batch biological water treatment systems with varying environments and capacities, the present invention provides an initial 120 minutes, limited 100 minutes, more limited 80 minutes, even more limited 60 minutes It is preferable to proceed, and more preferably, the odor gas collection may proceed for the first 40 minutes of the aeration stage, and even more preferably, the odor gas collection may proceed for the first 30 minutes of the aeration stage.

If this is roughly converted into a percentage (%) with respect to 120 minutes of aeration time, the collection time at the aeration stage of the reactor is

It is preferable to proceed to 100%, limited 80%, more limited 70%, even more limited 50%, more limited 35%, most limited 25%.

In addition, the cover (C) constituting the concentrated selective odor collecting means and covering the upper portion of the reaction vessel preferably covers the entire reaction vessel. In particular, the reaction tank (T1) is equipped with an Oxidation Reduction Potential (ORP) sensor for measuring the redox potential value of water containing oxides. It is desirable to increase the removal of odors. The increase and decrease of the odor collection amount can be implemented by increasing or decreasing the odor transfer amount by a pump or a blower provided in the odor transfer pipe.

The head space gas (head space gas), that is, the odor source, is preferably processed through the conventional biofilter unit 20 and the adsorption treatment unit 30, which are subsequent odor treatment means, through forced transfer by a pump rather than a natural flow. In particular, it is preferable to be transported to the odor treatment means equipped with the following odor active monitoring function applied to the water treatment system of the present invention described below with respect to FIGS. In addition, if necessary, the concentrated selective odor collecting means may be provided with a separate TRS sensor (S).

On the other hand, biological water treatment system having a concentrated selective odor collecting means according to the present invention can be basically applied to a system having a separate aeration tank, that is, a water treatment system applying a continuous biological water treatment method.

In the biological water treatment system according to the present invention as described above, the background, progress and series of research experiments of the intensive selective odor collecting means are as follows.

Dog

The creation and development of sewerage is in the same history as the creation and development of cities. As the population grows and the city grows in size, water usage increases and sewage generation increases at the same rate. Therefore, there is a need for a sewerage system that can effectively treat increased sewage.

Sewage is a public sewage system, which is installed or managed by local governments, and small and medium, sewage, and personal sewage installed by the installer or owner of a building or facility to discharge or treat sewage from the building or facility. There is a 'personal sewer' that refers to a treatment facility and its associated facilities. As urban areas have a high population density and almost close distances between houses, sewage systems that collect sewage through sewage pipes and concentrate them in sewage treatment facilities are environmental and economical (Ministry of Environment, 2010, 30-year history). In the meantime, the government has made steady efforts in 22 sewage treatment plants in 1991, 357 in 2007, sewage supply rate from 35.7% to 87.1%, sewage treatment rate of 85.8% in 2006, and 23,273 thousand tons per facility capacity. .

As the economic level gradually increased, citizens pursued a more comfortable life, and the odor generated from the sewage treatment process became recognized as a 'resident hate facility'. In addition, when construction of a new sewage treatment plant or expansion of an existing treatment plant was encountered, the installation was often delayed due to severe opposition from the local residents.

According to the 2006 data from the Ministry of Environment's analysis of odor complaints and directions for odor management in 2006, a total of 4,797 cases of odor complaints occurred nationwide in 2006, up 11.5% from 4,302 cases in 2005. .

There are various wastewaters such as livestock wastewater, commercial wastewater, and septic tank wastewater, and there are various treatment methods and facilities for treating them, but there is a need for living sewage that occurs inevitably in residential areas, especially around the city, and causes the most direct and immediate situation in life. Treatment facilities are critical, and for this purpose, the elimination of odors from generalized biological water treatment systems is also more urgent than ever.

Therefore, sewage pipes and various sewage, sewage, and wastewater treatment plant odors are of great interest in modern society. Among the various odorous substances emitted from various sewage and treatment facilities, volatile sulfur compounds (VSCs) are known as major odorous substances. It is important to reduce the emissions of volatile sulfur compounds from wastewater and sewage treatment plants.

The development and introduction of odor treatment facilities that meet or exceed odor emission standards is also important.However, it is necessary to devise real-time monitoring and operation methods for timely response to odor occurrence in biological water treatment facilities. The inventors conducted research on where to collect the collecting means, and achieved the desired results. In connection with this result, the online TRS analyzer was installed at the boundary area of sewage pipe and sewage treatment plant in real time. Invented a way to monitor and respond immediately when odor occurs, that is, odor treatment system equipped with active odor monitoring.

In addition, the present research results and the concept of the present invention are activated sludge applying continuous biological water treatment method and batch biological water treatment method represented by A2O method, in particular anoxic / aerobic alternating method (AAA). Research and invention achievements have also been made to the odor trapping and treatment system generated in the reactor.

Experiment to verify the effectiveness of reducing odor reducing agent in sewage pipe and effectiveness of TRS analysis equipment

That is, the present invention evaluated the applicability of the odorous substances generated in the sewerage and sewage treatment plants, the trend of their occurrence, and the real-time TRS analyzer for controlling them, by applying commercially available odor reducing agents to sewage pipes of four locations in Seoul. As a result of evaluating sewage odor reduction efficiency before and after the first spraying,

 It was found that the effectiveness of the odor reducer spraying in the market, which is considered as a odor reduction measure in roadside manholes and rain gutters in Seoul, did not have a significant effect.

Therefore, in general, there was no reduction effect of odor reducing agent in sewage pipe.

Nevertheless, the effectiveness of the TRS analysis equipment has been proved, and the research on the odor emission characteristics, the odor collection and treatment method using the TRS analysis equipment in other sewage treatment facilities, especially the sewage treatment plant, was found to be effective.

Actual organic waste treatment plant-Odor characteristics test for each odor type and each reaction unit process

In order to identify odor-causing substances that occur in sewage treatment plants and to find ways to respond to them in a timely manner, we analyzed odor-causing substances and odor occurrence characteristics in sewage treatment plants located in Ansan, Gyeonggi-do.

To this end, Siheung City, located on the west coast of the Seoul metropolitan area, is behind Siheung and Banwol industrial complexes. As of 2005, the number of air pollutant emission companies out of 7,300 tenants is about 2,000. In addition, some industrial lands are changed to residential lands, and complaints about odors are constantly occurring.

In particular, after the residential area is formed next to the sewage treatment plant, pollutants generated from the sewage treatment plant move toward the residential area, and the severity of the damage caused by the odor is increasing.

Therefore, the odor generated from the sewage treatment plant has been a big problem for the sewage treatment plant operators. Until December 2007, cover was set for sedimentation and dehydration processes of sewage treatment plants, and washing towers and biofilters were installed as odor prevention facilities.

In the study, the starting point of the present invention, the characteristics of odor-causing compounds generated in each process of Siheung city sewage treatment plant were evaluated. At present, the sewage treatment plant in Siheung has established its own odor reduction plan. However, this reduction is simply covered by each process, the air in the cover is collected and treated in a odor prevention facility such as a biofilter. However, since the amount of air collected in each process is too large, a large blower and a biofilter are required at the rear stage. This in turn puts an economic burden on operators.

Therefore, the characteristics of odor-causing compounds that occur in each process of sewage treatment plant are evaluated through instrumental analysis, and a real-time TRS monitoring system is installed to continuously measure and evaluate the odor occurrence trend of the process to identify operational problems and respond accordingly. The scheme, ie, the concept of the present invention, was derived.

Siheung Sewage Treatment Plant is equipped with the first stage treatment facility (gravity sedimentation method) for plant wastewater (115,000 m ³ / day) generated from Sihwa National Industrial Complex and domestic sewage (61,000 m ³ / day) generated throughout Sihwa City. Standard activated sludge process to remove organic matter in the process of decomposition and growth of aerobic microorganisms: 176,000 m ³ / day) and two-stage treatment facility (CNR (Cilium Nutrient Removal) process to remove nutrients such as nitrogen phosphorus): 103,000m ³ / day Is processed using). Also Siheung sewage treatment plants are treated with the food talriaek 50m ³ / day generated from pretreated 80 m ³ / day of food composting facility generated in sewage treatment plant site unlike a typical wastewater treatment plant.

In terms of odor generation, each unit in the sewage treatment plant is a potential source of odor. Real-time TRS odor monitoring system was installed to monitor the tendency of sulfur compounds in sewage treatment plant. The reason for choosing TRS automatic measuring equipment is H ₂ S, CH ₃ SH, DMS in most organic waste related facilities such as sewage treatment plant, manure treatment plant and food treatment plant. This is because sulfur-based materials such as methyl disulfide have been identified as a cause of odor.

The TRS automatic measuring device (M102E, Eco-S & E, Korea) used SO ₂ measuring device using UV fluorescence and thermally oxidized reducing sulfur compounds contained in the sample gas flowing into the measuring device. It is a device that converts to and measures it.

In particular, gas samples were taken from each unit process using TRS automatic measuring devices to measure complex odors and individual odor-causing substances in the laboratory. The sewage inlet, the primary sedimentation basin, and the rear stage of the bioreactor were sampled from the outside, and the rest of the processes were taken from the inside.

As a result of analyzing the odor concentration collected in each unit process, the concentration of factory wastewater inlet, mixing tank, food treatment, thickening tank, and dehydration tank was found to be higher than that of open clarifier and aeration tank. In addition, some of the individual odor items measured in several unit processes exceeded Korea's emission limit (H ₂ S0.002ppm, CH ₃ SH0.002ppm, ammonia 1ppm, acetaldehyde 0.05ppm).

In addition, if you look at the TRS concentration graph measured on the site boundary near the abandoned tank, it can be seen that the TRS concentration was high from 22:00 to 4:00 the next day. Odor generated in the aeration tank was continuously measured for more than 6 hours in the direction of the measuring sensor.

In looking at the TRS measuring device, it was found that the effect on the concentration change of the odor gas was related to the operation of the aeration tank. In other words, the Siheung Sewage Treatment Plant operates the A2O process to remove nitrogen and phosphorus. In the anaerobic and anaerobic reactors, the odorous substances are methylated (-SH) and odorous substances are stripped under aeration conditions. It was found to occur a lot.

By using the TRS analysis device, the odor of sulfur compounds generated in the sewage treatment process was monitored in real time, and the operation status of the sewage treatment process could be indirectly understood. As a result, the TRS odor concentration was sometimes high depending on the operation method of the sewage treatment plant process (when composting and sludge transportation process, etc.). Therefore, when the real-time continuous monitoring system is introduced into the sewage treatment plant, the operator checks the phenomenon of high odor concentration through the control system and establishes a quick countermeasure through immediate identification of the source of the odor so that the odor spreads around the sewage treatment plant. It was decided that the minimum could be prevented.

Organic waste treatment plant applying AAA and A / O methods-bench scale

     summary

Sewage treatment facilities are reducing organic substances and nutrients present in sewage to a satisfactory level, but the odors generated from sewage and its treatment have not been removed to a satisfactory level. For this reason, sewage treatment plants are recognized as abominations by the residents.

Odors associated with sewage treatment plants are mainly generated from mixtures of odorous substances such as volatile sulfur compounds, volatile nitrogen compounds and volatile fatty acids. Among these, volatile reduced sulfur compounds (VRSCs) such as sulfides and mercaptans are known as major odorous substances related to sewage treatment plants. This is because organic sulfur compounds are hydrolyzed under anaerobic conditions, or microorganisms or chemically reduced to release odorous substances from the wastewater. At this time, the odors emitted from settlements and solids treatment facilities are stronger or more severe, but the secondary aeration basins are mainly referred to in the literature as sources of odor from sewage treatment plants (Koe, 1985; Sekyammah, K., et al. , 2008). Aeration tanks have also been identified as major sources of VSCs such as hydrogen sulfide, methyl mercaptan, dimethyl sulfide, carbon disulfide and carbonyl sulfide (Camp Dresser & Mc Kee., 2003).

Sewage odors are generally not produced under aerobic conditions and may actually degrade (Nurai Islam, A. et al., 1999). More than 95% of the VSCs in the primary treated water are removed due to biodegradation and degassing in the secondary aeration process (Hwang et al., 1994). It is known that the rate of odor emission of the aeration tank is highest near the inlet or front end of the treatment process, and decreases inwardly toward the downstream end of the inflow into the sedimentation basin (Camp Dresser & Mc Kee., 2003).

In the meantime, there are studies on the quantification of malodors generated in sewage treatment plants and examples of researches on the concentration of malodors on site boundaries of sewage treatment plants. However, these studies are still at the level of monitoring research, such as the collection of atmospheric gases at one or two points on the site boundary of a treatment plant. On the other hand, foreign countries have been interested in generating and controlling VOCs and odorous gases for a long time and have conducted many studies. Kim. (2001) have studied the correlation between the operating conditions and odorous compounds in sewage treatment plants and the establishment of odor reduction measures using them. Sekylamah et al. (2007) found that the depth of the sludge blanket in the secondary settling basin affected the generation of odor in activated sludge tanks. That is, many sludges accumulate in the sedimentation basin to form anaerobic conditions and produce sulfur compounds under these conditions. Here they report that improving sludge sedimentation of secondary sedimentation cells and proper wasting of excess sludge can reduce the generation of sulfur compounds in bioreactors (Sekyammah, K., et al. 2008).

A common method of controlling the odor emitted from the activated sludge process is to cover the activated sludge process and collect and treat the gas in the head space. However, this method is expensive. Proper odor control in sewage treatment plants requires continuous monitoring of odors emitted from the treatment process and an understanding of the mechanisms of odor generation. Through this, each unit process of the sewage treatment plant can be adjusted to minimize the generation and release of odorous substances (Schiffman, SS, et al., 2001).

    A / O and AAA Activated Sludge System Experiment

Bench-scale AAA and A / O (Anoxic-Oxic) activated sludge systems were fabricated and operated using an on-line TRS analyzer. Through this, the main odor gas emission sources from the bioreactors of sewage treatment plants were identified, and the odor emission mechanisms were revealed to suggest ways to reduce odor emissions.

The sewage sample used was the first sedimentation tank effluent from the Seoul Jungrang sewage treatment plant near the laboratory.

The sewage samples were analyzed for COD, TN, NH ₃ , NO ^-3 items according to ASTM for AAA reactor influent and effluent.

In addition, the analysis of sulfides (Methyl mercaptan, Dimethyl sulfide, Dimethyl disulfide) on the sewage sample, the return activated sludge and the head space gas of the bioreactor was analyzed by GC / MS.

 (A / O activated sludge system experiment)

A laboratory scale A / O activated sludge system was installed to experiment with the optimal control of the odor emitted from the bioreactor operation (Figure 6.6). The A / O activated sludge system was provided with one anoxic reactor having a capacity of 10 L and two aeration reactors each having a capacity of 10 L. Like the AAA activated sludge system below, the influent storage tank, the bioreactor, and the sedimentation tank were configured in the same way.

A / O reactor operating condition was HRT 10 hours, Solid Retention Time 12 days, Return of Activated Sludge (RAS) 100%, pH about 7, DO 2-3mg / L, MLVSS 3-4g / L Was maintained.

 (AAA activated sludge system experiment)

In addition, the lab scale scale AAA activated sludge system was installed to identify the odor tendency in the bioreactor. The AAA activated sludge system is a 4L bioreactor with a sedimentation tank at the rear end and a storage tank for influent at the front end. In the case of the bioreactor, the upper part was sealed with a cover, and a gas collecting device for TRS analysis and a gas collecting tube for instrument analysis were installed. The air injector of the bioreactor was operated at intervals of 2 hours for aeration and 2 hours for aeration without intermittent aeration. In addition, a stirring device was installed for smooth mixing between the inflow wastewater and the sludge inside the reactor. In the case of the inflow wastewater storage tank, a stirring device was installed to keep the characteristics of the wastewater constant, and a top of the storage tank was installed with a cover.

The operating conditions of the AAA reactor were HRT 8 hours, Solid Retention Time 15 days, Return of Activated Sludge (RAS) 100%, pH 7, DO 2-3mg / L, MLVSS 3-4g / L. .

During the operation of the reactor, pH, DO concentration, and ORP in the reactor were measured separately by aeration / aeration.

     Summary of results

A laboratory-scale AAA activated sludge system was installed to evaluate total reducing sulfur compound emissions. From the real-time TRS measurement results, it was confirmed that the reducing sulfur compound accumulated in the anoxic state before the aeration phase was discharged by the degassing at the early stage of the aeration phase.

In addition, as can be seen in the graph comparing the TRS emission amount for the anaerobic phase and the aeration (aeration) phase with time in FIG. It was confirmed that a significant amount of odor could be removed when the gas was collected and treated.

In addition, the laboratory-scale A / O activated sludge system was installed to identify the odor emission characteristics in the anaerobic and aeration tanks.

Similar to the graph results of FIG. 1C in the AAA activated sludge system, the amount of odorous substances discharged from the first one-third of the aeration tank was 75.6% of the total amount of the odor emission. Therefore, it is believed that if the wastewater treatment plant is covered with about 30% of the aeration tank and the head space gas is collected and treated, it will be an economical and effective way to control the smell of the sewage treatment plant.

Based on the above results, as described above with respect to FIG. 1A,

We have developed a concentrated and selective odor capture system suitable for batch biological water treatment processes, especially AAA based water treatment systems,

Concentrated selective odor capture means can be developed for water treatment systems based on continuous biological water treatment processes, particularly A / O or A2O processes.

Next, the odor processing means (A) having an active monitoring function for the odor collected in the concentrated selective odor collecting means of the biological water treatment system according to the present invention will be described.

As shown in Figures 2 and 3, the odor treatment means (A) introduced into the biological water treatment system according to the present invention is a chemical liquid cleaning processing unit 10, biofilter unit 20, adsorption treatment unit 30, the control unit ( 40) and various sensors S1a, S1b, S1c, S2a and S2b provided on the pipe.

First, the odor treatment means (A) equipped with the odor active monitoring function introduced into the biological water treatment system according to the present invention effectively blocks the odor, collects and processes the odor, purifies with clean air, and then discharges it to the outside. As it aims to maintain a pleasant working environment, abide by the emission standards set by the Odor Prevention Act, and reduce civil odor complaints to public facilities,

The design of the malodor treatment means (A) with the malodor active monitoring function introduced into the biological water treatment system according to the present invention is to consider the treatment criteria, treatment method and efficiency so that the malodors to be treated in consideration of the characteristics of the malodor source. A sensor that can detect various odorous components is attached in place so that the operating conditions can be changed and adjusted according to the emission concentration.

In the organic waste treatment plant and bio power generation system, which are the source of odor, the odor spreading prevention device is additionally configured according to the odor characteristics peculiar to each facility such as import facilities, storage facilities, dehydration facilities, pretreatment facilities, anaerobic digestion facilities, and wastewater treatment facilities. For example, it is necessary to configure the collection device to realize local exhaust and then determine the final deodorizing capacity. This malodor generating source (P) is a continuous biological water treatment process, in particular aeration tank (or anoxic tank) or a batch biological water treatment process, especially in biological water treatment systems with concentrated selective malodor collection means according to the invention. It means the gas collected by the odor collecting means installed in the reactor (hereinafter referred to).

In addition, in order to select an appropriate treatment method in the composition of the odor treatment means, the prediction of the inflow concentration is most important. If the treatment target is set on the basis of this, a suitable treatment method can be selected in consideration of treatment efficiency, economic feasibility, site conditions, equipment cost and operating cost.

In view of the above, the present inventors consider that the main odor source of the odor generating source is generated from food waste, pretreatment of livestock manure, anaerobic digestion system, and total reducing sulfur compound (TRS) containing hydrogen sulfide as a main odor source. (Total Reduced Sulfur) has been found through a series of various field surveys and research procedures that it is appropriate to set the standard of treatment for this odor treatment means in anticipation of 10-20ppm concentration.

Since the concentration of each source is predicted, the concentration conditions are summarized in the following table to select a rational treatment method.

In addition, since the most basic concept of deodorization treatment is the order of blocking, collecting, treating, and discharging, there are many shortcomings that focus only on the treatment method, so comprehensive concept setting and integrated control are important.

The basic concept of odor treatment is the process of [blocking] → [collection] → [treatment] → [discharge].

block

The surrounding area of odor generating source should be blocked to prevent unnecessary odor from entering and at the same time, it should have a function to prevent spreading to the outside. From this, the amount of odor generated should be minimized so that economic efficiency can be achieved.

Capture

The proper hood structure, installation location, and air balance should be taken to maintain the flow of air to accurately capture odors. Consideration should be given to the placement and collection of effective ducts to the treatment system.

process

The odor characteristics, characteristics, and concentrations should be considered in consideration of treatment efficiency, economic feasibility, and land area.

exhaust

The final outlet should be designed in consideration of the effect on the surroundings and the proper height in consideration of the diffusion effect and the surrounding conditions.

Next, the types of odors to be treated, especially the main types and concentrations of odorous substances generated in the treatment process of organic waste treatment plants, are generated at high concentrations of ammonia, as shown in the table below. Doing. There are about 20 kinds of odorous substances generated in the combined treatment of organic wastes, but the major substance is hydrogen sulfide (H ₂ S), which is large in quantity and easy to control, and was used as a design control factor.

Note) The above data is measured at D aerobic composting process.

In addition, four types of design odors were selected based on hydrogen sulfide, which is frequently generated in the manure treatment process and easy to detect and control, and added ammonia, acetaldehyde, and amines generated in the anaerobic treatment process. It was.

Furthermore, the concentration characteristics of odor generated during aerobic composting or anaerobic digestion of organic waste are as follows.

[Characteristics of Odor Substances in Anaerobic Digestion Treatment Plant]

(1) The concentration of odor generated is high.

Corruption or other reactions occur during the import and disposal of organic waste, causing severe odors in vegetables, meat and livestock manure within the organic waste.

(2) The main components of odor generation are hydrogen sulfide and ammonia.

High emulsified hydrogen and ammonia concentrations are generated, which is generated by sulfur (S) -based organic matter in the manure as hydrogen emulsion and by the anaerobic nitrogen-based components in the food as ammonia. However, sulfide-based components tend to show low reaction with nitrogen-based components during development.

(3) There is much moisture, and there is much dust generation amount.

Due to the characteristics of organic wastes containing a large amount of moisture and the moisture generated during fermentation, high humidity conditions are created.Many dusts are introduced along with the process of mixing, crushing and drying organic wastes. A significant amount will be introduced.

(4) Preventive measures to prevent clogging in the facility due to high odor are necessary.

Due to excessive growth of microorganisms, excessive coating of carriers and clogging of carrier pores inhibits the growth of microorganisms and lowers the treatment efficiency, making it difficult to maintain long-term and efficient operation. Therefore, selecting the deodorization method having both stable treatment and economical efficiency by preparing the appropriate countermeasures by grasping the above characteristics is an important problem.

(5) It is difficult to block odor at treatment facility.

It is very difficult to block the odor generated in each treatment process through the import process, the treatment process and the fermentation process in the treatment process to prevent it from being discharged to the outside. To this end, it is necessary to prevent a sufficient sealing device and blocking structure.

Characteristics of Odor Substances Generated from Combined Organic Waste Treatment (Aerobic Digestion)>

In addition, the correlation between the total reducing sulfur compound concentration and the compound odor was measured in the following manner, and a graph showing the relationship between the odor index calculated by each sewage treatment plant and the compound odor was attached to FIG. 11. 'Composite odor' refers to a smell that gives off a sense of displeasure and disgust by stimulating a human's sense of smell when two or more odorous substances are present in combination.

(1) The purpose of this study was to evaluate the feasibility of this sewage treatment plant odor investigation through the correlation analysis between each compound and the mixed odor in six sewage treatment plants.

(2) For this purpose, the individual odor index for each compound detected by each sewage treatment plant (see below) was calculated and geometrically averaged to calculate the integrated odor index at each point.

(3) The correlation between the malodor index calculated for each sewage treatment plant point and the complex malodor for each point was evaluated.

(4) As a result of the evaluation, it was confirmed that as the malodor index increased, the concentration of the complex malodor increased. This confirms that the survey analysis method was properly performed.

(5) Also in FIG. 10, the analysis results confirmed that the compounds contributing to the malodor at six sewage treatment plant points were sulfur compounds.

(6) However, in FIG. 10, in the NPC and Nanji Sewage Treatment Plant, despite the low odor index, a relatively high compound odor was detected, which is a contribution of a compound other than the compound covered by the process test method. Judged.

(7) Looking at the results shown in the above odor index In Figure 10, the odor index and composite odor is detected in the Siheung sewage treatment plant and Seonam sewage treatment plant low.

Next, since the odor generated from the odor generating source is effectively collected and the discharge path is set, the main points of collection and discharge are as follows.

Focus on Odor Collection Emissions Design

(1) Designed to meet the odor emission characteristics of odor generating sources.

(2) The hood and direct connection are to be intended to induce airflow in the odorous discharge space, not just suction.

(3) Collected odors should be collected in a uniform manner in a balanced manner so that they do not accumulate in some sections.

(4) The route of collecting duct is to be set efficiently to take into consideration the interruption of flow, stop and interference with peripheral devices.

(5) Each hood terminal is to be provided with air volume control sound wave and test hole for setting Air Balance.

On the other hand, the method of discharging the odor after the proper treatment is also a part that can not be neglected. In the present invention, it was designed as follows.

(1) After the treatment of odor, the discharge was immediately discharged from the rear stage of the biofilter. If the performance was insufficient due to the growth of the initial microorganisms of the biofilter, it was finally discharged through the activated carbon adsorption unit of the rear stage.

(2) The final outlet should be designed to be as high as possible on the ground, but the surrounding conditions should be taken into consideration so that people do not come in direct contact with each other and maintain the height to prevent vortex and trickle phenomena caused by nearby buildings or structures. .

(3) At the rear end of the bio filter and the final discharge port, sensors for detecting hydrogen sulfide were attached and odor analysis was conducted to ensure odor reduction.

(4) The final outlet structure was eccentrically connected to the duct so that the final outlet concentration could be smoothly mixed in the outlet, taking into account the average concentration of the final outlet.

(5) In order to firmly support wind and self-weight in consideration of the diameter and height of the outlet, a floor foundation shall be installed and fixed.

(6) The outlet body is made of SS400, so that the inside is corrosion-resistant to prevent corrosion, and the outside is finished with anticorrosive coating.

Before proceeding with the treatment of odor based on such a design, it is necessary to collect odor generated in the anaerobic digestion process of an organic waste treatment plant or a livestock manure treatment facility by process and transport it by using a blower and a duct pipe. The main odor generating processes in organic waste treatment plants or livestock manure treatment facilities are (1) pretreatment, (2) dehydration, (3) anaerobic digestion, and (4) wastewater treatment. It is advisable to determine the design of anaerobic digestion and wastewater treatment facilities first.

In FIGS. 5, 2 and 3, which are schematic views of the chemical liquid cleaning processing unit 10, in particular, the chemical liquid cleaning tower, the chemical liquid cleaning processing unit 10 is suitable for treating water-soluble odorous substances, inexpensive installation cost, and dust treatment. Has In addition, the efficiency of chemical cleaning is determined by the replacement cycle of purified water. However, there is a disadvantage in that the treatment water cost is generated and the water-insoluble odor treatment is difficult.

Acidic scrubber towers and basic scrubbers for alkaline and acidic odor removal, or simple water scrubbers, or neutralized scrubbers after acidic and basic scrubbers may be further roughened,

As can be seen in FIG. 5 showing these common configurations, the lower washing water is pumped by the circulation pump 15p to flow meter for quantitative control (circular 'F' in FIG. 5, the same in other drawings hereinafter. And a pressure gauge (circular 'P' in FIG. 5, the same in other drawings hereinafter) are introduced into the filling body, ie, sprayed or sprayed through the injection nozzle 13 through the injection nozzle 13. The chemical liquid is replenished in the chemical tank 15 as needed, and water is supplied from the water supply unit 17 to ensure an appropriate chemical liquid concentration and flow rate. Air containing the odor is sucked through the intake portion (A1) and passes through the median layer (11) and finally discharged by the suction force of the blower to go through the next process.

The media may be a variety of members, but basically it is desirable to improve gas-liquid contact. For example, the media may be a product obtained by cutting an extruded synthetic resin tube into a length of 5 to 20 mm, and the media may include a perforated plate having a plurality of holes formed therein to prevent the loss of the media at the top and bottom of the media layer. In the introduced state, when spraying (or spraying) the chemical liquid (or washing water), the chemical liquid is filled to some extent between the upper and lower perforated plates, and the media has a density of about 0.92-0.96 g / cm 3 so that the media can flow by water flow. And made of a material of synthetic resin (eg polyethylene).

In addition, it is preferable that the cutting tube-type media to enhance gas-liquid contact has a plurality of external protrusions for buffering and collision between media and the internal protrusions for increasing the surface area.

The chemical liquid (or washing water) is preferably transported (or transported) to the aftertreatment unit 10p, in particular a wastewater treatment plant (WWTP) after a certain period of use.

The media layer 11 and the spray nozzles 13 may be configured as two or more layers instead of the one-layer structure shown as needed.

On the other hand, media, especially cut-tube media, have foreign substances (scales) stuck on the inside and outside surfaces with time of use, and this may cause secondary contamination or a decrease in the age of chemical liquids. Therefore, it is desirable to reduce the operating cost by increasing the chemical replacement cycle and to maintain the cleaning treatment efficiency at a constant level.

Accordingly, in the present invention, as shown in FIG. 9, it is considered to introduce a regeneration stirring means 19. The regenerative stirring means 19 is installed between the upper and lower perforated plates of the media layer to stir the media. The rotary shaft 19A is connected to the motor 19C directly or via a speed reducer, and a plurality of protrusions are coupled to the outer peripheral surface of the rotation shaft. It consists of a stirring blade 19B.

In addition, the stirring blade (19B) and the rotating shaft (19A) can be added and discharged the chemical liquid (or washing water) in the form of a pipe, the washing water is discharged to the injection hole (H) of the stirring blade (19B) to smooth the media It also functions to increase the efficiency of gas-liquid contact for odor treatment as well as washing regeneration. If necessary, the chemical liquid injection hole can also be introduced into the central rotating shaft.

Furthermore, in order to prevent the pump damage and the nozzle hole clogging due to the inflow of foreign substances, it is preferable that the filter is installed in front of the pump 15p.

As can be seen in the dashed-dotted circle of Figure 9, in order to solve the clogging of the injection hole (H) of the stirring blade (19B), the stirring blade is composed of the inner tube (19a) and the outer tube (19b), The drainage hole h1 of the inner tube is relatively large (for example, about 1 to 4 cm 2), and the drainage hole h2 of the inner tube is relatively small (for example, about 0.1 to 0.8 cm 2). The inner tube 19b may take a method of separating and discarding the inner tube and inserting a new inner tube when the drainage hole h2 is blocked using a cheap synthetic resin hose. If necessary, the inner tube may be non-circular (polygonal, elliptical, etc.) or not at least inner tube of cross section in order to ensure mutual coincidence of the drainage holes (h2) (h1) of the inner and outer tubes (19b) and (19a). The outer surface has a longitudinal concave-convex shape, and at least the inner surface of the outer tube may have a shape corresponding to the outer circumferential surface shape of the inner tube so that the coupling between the drain holes h2 and h1 can be easily performed.

The following table summarizes the principle of chemical cleaning and the target gases.

Next, the biofilter unit 20 will be described with reference to FIGS. 6, 2, and 3, which are schematic views.

The biofilter unit 20 has a low maintenance cost and shows very high processing efficiency for some materials. However, there are disadvantages in that the installation area is large and the biological treatment of the material is difficult.

The core technology of the biofilter consists of a media filling unit 23 which can absorb microorganisms capable of decomposing odors and odorous substances and maintain the function of microorganisms by providing a living space of microorganisms. Decomposition of odorous substances is removed by the following series of processes.

(1) Water in the lower part of the housing supplemented by the water supply unit 25B with the pollutant gas containing the malodorous substance and the organic compound is pumped by the circulation pump 21p and passed through the humidity controller 21 sprayed from the upper nozzle. Thereafter, the water is supplied from the water supply unit 25A to pass through the media filling unit 23, which is the core of the biofilter, in which water is sprayed from the nozzle.

(2) the substances introduced into the median filling unit 23 are attached to the surface of the porous media (carrier) and adsorbed to the microbial layer forming the biofilm,

(3) Adsorbed materials are used as carbon sources or other nutrients required for the growth of microorganisms and are decomposed into odorless / harmless CO2, water, microorganisms, and minerals (sulfuric acid or nitric acid) or energy required for the growth and activity of microorganisms. Used as a circle.

(4) After the contaminants contained in the contaminated air are removed by the decomposition of the microorganisms while passing through the media filling layer 23,

It is discharged by the blower according to the degree of contamination of the air processed by the biofilter unit 20 and is transferred to the exhaust unit A2a, or after the adsorption treatment unit 30 according to the degree of contamination of the air treated by the biofilter unit 20. Is transferred to).

In addition, when the replacement cycle is necessary after the use cycle, the used washing water is preferably transferred (or transported) to the after-treatment unit 20p, in particular, a wastewater treatment plant (WWTP).

Next, the adsorption treatment unit 30 will be described with reference to FIGS. 7 and 2 and 3.

The adsorption treatment unit 30 is capable of processing most of the odorous substances and the efficiency is determined according to the replacement cycle of the adsorbent. However, there is a problem that the cost of activated carbon replacement and excessive cost in the treatment of high concentration odor. Therefore, it is preferable that the sensor is installed at the rear end as possible as shown in Figs.

The adsorption treatment unit 30 filled with various porous grains, especially activated carbon, is filled with an adsorbent capable of reacting with a basic gas in order to effectively adsorb the ammonia and amines, which are the main substances of odor, and finally, the treated gas is exhausted. It is released through (A2b). The adsorbent basically has fine pores formed therein and has a specific surface area and strong adsorptive properties.

On the other hand, other malodorous treatment means may be further arranged at an appropriate position based on a graph showing an appropriate application treatment technique for each malodor concentration and treatment flow rate shown in FIG. 8.

Next, the odor active monitoring function and processing process of the odor treatment means according to the present invention will be described in more detail with reference to FIGS. 2 to 4.

In order to more fully monitor the treatment efficiency of the malodor prevention facility and to economically maintain the malodor prevention facility, it is desirable to establish a malodor control system 40S using a communication network, in particular, the CDMA network 40W. And nutrient supplying factors and control the growth of microorganisms. The online monitoring of the malodor treatment process also provides the reliability of the malodor prevention facility.

To this end, total reducing sulfur compounds such as hydrogen sulfide, methyl mercaptan, methyl sulfide, and methyl disulfide, such as hydrogen sulfide (P), which occur mainly in organic waste treatment plants and have high odor intensity and odor contribution, are used. By continuous automatic measurement

(1) chemical liquid cleaning processing unit (10), in particular, the maintenance and management of economic odor treatment,

(2) the normal operation monitoring and odor treatment efficiency monitoring of the biofilter unit 20,

(3) When the biofilter unit 20 malfunctions or the odor treatment efficiency is reduced, the exhaust valve is shut off and the exhaust gas tertiary treatment determination by the adsorption treatment unit 30, ie, the activated carbon adsorption tower, is determined.

(4) Providing the data for determining the chemical input amount, chemical filter replacement cycle, and activated carbon (adsorbent) replacement cycle in the chemical cleaning unit 10 and other treatment processes used in this malodor treatment means (A),

(5) Minimize odor sources (P), especially odor sources in organic waste treatment plants, using odor control programs.

Implements the objectives.

In the odor treatment means (A) according to the present invention, it is preferable that the odor detection sensor is provided at the inlet or outlet of the chemical liquid cleaning processing unit 10, the biofilter unit 20, the adsorption treatment unit 30, or both.

In the present specification, 'inlet' and 'outlet' refer to the same, but represent the chemical liquid cleaning unit 10, the biofilter unit 20, and the adsorption treatment unit 30, respectively, and do not cause confusion.

In FIGS. 2 and 3, in consideration of the situation in which the chemical liquid cleaning processing unit 10, the biofilter unit 20, and the adsorption processing unit 30 are continuously arranged, the inlet and outlet ports of the chemical liquid cleaning processing unit 10 and the adsorption processing unit 30 are provided. Sensors S1a, S1b, S2a, and S2b are introduced, respectively, and the chemical liquid cleaning processing unit 10 is composed of an acid washing tower 10A and a basic (10B) washing tower for removing alkaline and acidic odors. A separate sensor S1c was further introduced.

That is, the odor measuring point

(1) Sensor S1a-chemical liquid cleaning processing part 10 Inflow part (i.e., intake part A1): a two-stage washing tower (acid and Basic) (10A) (10B) measured at the inlet

(2) Sensor S1b-chemical liquid cleaning processing part 10 outflow part (biofilter part 20 inflow part): measuring the odor processed by the two-stage washing tower

(3) Sensor S2a-Biofilter Section 20 Outflow Portion: Determination of odors processed by the biofilter (determination of whether to transport exhaust section A2a or subsequent adsorption section 30)

(4) Sensor S2b-Adsorption treatment part 30 Outflow part (if necessary): When the odor flowing out of the biofilter part 20 exceeds the reference value and is treated by the adsorption treatment part (adsorption tower), the discharge concentration is measured.

(5) Sensor S1c-pH measurement between pickling and alkali washing in chemical cleaning tower

First, the characteristics of the chemical cleaning unit 10, in particular the treatment tower

(1) Excellent ability to handle complex odors: It is suitable for removing complex odors composed of 20 kinds of substances discharged from food processing and various characteristics.

(2) Excellent for the treatment of non-aqueous malodorous substances: It has excellent removal efficiency even in the decomposition of non-aqueous substances by oxidative decomposition of organic substances using primary electrolytic water.

(3) Significantly reduce the amount of wastewater generated: The internal salt concentration can be kept low by decomposing organic substances and dissolved odorous substances in the washing tower tank, thus reducing the number of exchanges in the tank. In addition, the concentration can be lowered when discharged ⇒ 70% or more reduced wastewater generation

It is called.

In the concrete design, the odor generation is changed according to the capacity of the object to be treated. Therefore, the volume and surface area of the two-stage scrubber are determined by the determination of the amount of organic waste treatment.

On the other hand, the treatment principle of the chemical liquid cleaning processing unit 10 is summarized in the following table.

Next, the biofilter unit 20 is composed of a Mejia that can absorb the microorganisms capable of decomposing odors and odorous substances and maintain the function of the microorganisms by providing a habitat for the microorganisms. Described. The pressure increase and total pressure increase of the biofilter unit are determined according to the odor treatment capacity generated in the organic waste treatment process.

Subsequently, the adsorbents constituting the adsorption treatment unit 30 have characteristics of activated carbon.

(1) Adsorbents are used to adsorb basic gases to adsorb untreated ammonia, amines and neutral odor gases.

(2) The type of adsorbent is cylindrical by molding and has a size of 10 ~ 13mmD x 10 ~ 30mmL. Therefore, it maintains the molding form well, so that the filtration performance is high, there is little breakage phenomenon and relatively low pressure loss.

(3) The color is red, dark brown or gray brown.

(4) The apparent specific gravity is 0.7kg ± 0.1kg / L

(5) Ammonia and amine adsorption capacity: 70 ~ 100 g / kg

to be.

Adsorption tower implementing the adsorption treatment unit 30

(1) Duration of stay: 1 second or more

(2) Type of adsorbent: basic gas adsorbent

(3) Adsorbent replacement cycle: 4 years

Is the design criterion.

In the case of gas adsorption tower

(1) It is to be durable structure that can support the weight of internal adsorbent.

(2) It should have a form that can effectively cope with internal gas flow and pressure.

(3) The structure of the adsorbent is to be suitable so that it does not leak out.

(4) When adsorbent is replaced, sufficient space is to be provided for smooth operation.

(5) The body is made of ordinary carbon steel and epoxy is coated on the surface to prevent corrosion.

It is desirable to make the matters the production specialty.

Furthermore, the gas adsorption tower

(1) If odorous substances sufficiently treated in the shear scrubber and biofilter are normally removed and comply with the performance assurance standards, they should be discharged to outside air through the adsorption tower bypass.

(2) If the shear is not sufficiently treated or if additional treatment is needed due to sudden concentration increase, close the bypass line and allow normal treatment via the adsorption tower.

(3) Due to the characteristics of the adsorption tower, if the adsorbent is saturated, it needs to be replaced.

It is advisable to make the matters the operating method.

In addition, the volume and surface area of the adsorption tower are determined by the odor treatment capacity generated in the organic waste treatment process.

Each step (10) (20) (30) and other odor gas treatment method applied to the odor treatment system (A) of the present invention as described above are summarized in the following table.

Therefore, on the basis of the comparison results in the above table, in particular, the odors generated in each process of the organic waste treatment plant are preferably divided into general odors and process odors and are treated according to treatment methods and treatment stages. To be processed. However, when the odor removal efficiency is low in the basic process or when checking and repairing, it is preferable to discharge the odor after treating the odor using an activated carbon adsorption tower.

Therefore, based on the processing through the [chemical liquid cleaning processing unit 10] → [biofilter unit 20] → [adsorption processing unit 30 (emergency)],

At this time, the composition, design inflow and final discharge concentration of the odor treatment system (A) is shown in the following table.

In the odor treatment means (A) according to the present invention is a multi-stage hybrid treatment method consisting of [chemical liquid cleaning processing unit 10] → [biofilter unit 20] → [adsorption processing unit 30 (emergency)]

① Stable removal of acid gas and alkaline gas from chemical liquid washing tower.

② If necessary, plasma equipment or electrolysis equipment is introduced to drastically reduce the chemical cost required for odor decomposition.

③ Neutral gas and various odorous substances are removed by using microorganism.

④ If the exhaust filter of biofilter exceeds the standard value or the treatment efficiency of the biofilter is low, the third stage of the adsorption tower is discharged.

⑤ It is possible to cope with various kinds of odors as well as high concentration odors by complementing various methods.

⑥ It can easily cope with the change of concentration by giving flexibility of operation.

⑦ Easy maintenance and convenient handling and operation.

It has a characteristic.

In addition, the odor control system 40S as shown in FIGS. 4 and 3 is constructed by using a communication network, in particular, a CDMA network 40W for monitoring the treatment efficiency of the odor preventing facility and for economical maintenance of the odor preventing facility.

Except for the sensor (S1c) for pH measurement between the acid washing and alkaline washing processes in the acid washing tower (10A) and basic (10B) washing tower, respectively at the inlet and outlet of the chemical liquid cleaning processing unit 10 and the adsorption treatment unit 30, respectively. The disposed sensors S1a, S1b, S2a, and S2b basically include a TRS (Total Reduced Sulfur) sensor.

In the present specification, the inlet or outlet of the chemical cleaning unit is a concept including an inlet or outlet of each of the acidic scrubber 10A and the basic scrubber 10B.

The total reducing sulfur compound sensor is a device for thermally oxidizing the reducing sulfur compound contained in the incoming sample gas, converting it into sulfur dioxide, and measuring the same. Sulfur dioxide is excited when it encounters ultraviolet (UV) light, and the concentration of sulfur dioxide in the sample gas is measured by the intensity of light generated. Calibrate the meter using H ₂ S standard gas. The measurement is used with PMT, dark offset, UV lamp ratio, residual light, and sample gas temperature and pressure to calculate final concentration. The calculated concentration values are stored in the instrument's internal data storage system (iDAS Section) and displayed to the user as analog signal outputs and various digital signals and meter screens.

In FIG. 4, the present malodor control system 40S is constructed.

① Data Management Program

-Digital display of data measured by total reducing sulfur compound sensor

-Display measured data from pH sensor

-Display odor efficiency graph

② Weather data program

-Digital display of measured data on weather sensor

③ Operation control program

-Chemical input control of odor prevention facilities

-Maintenance of odor prevention facilities

Control programs such as

In addition, the database of the measured data is built in the server 41, and the administrator can check the operation data monitoring screen through the monitor of the control PC 43, check the presence of abnormality of the odor prevention facility in real time, and take appropriate measures. .

Furthermore, the relay unit for each sensor (S1a, S1b, S1c, S2a, S2b),

In particular, the sensors (S1a, S1b, S1c) provided at the inlet and outlet of the chemical liquid cleaning unit 10 are TRS sensors and pH sensors, whereas the sensors (S2a, S2b) at the inlet and outlet of the adsorption treatment unit 30 are TRS sensors. And weather sensor

(The weather sensor collects data by measuring fine dust, ultraviolet ray, wind direction, wind speed, temperature, humidity, etc. in the air and transmits the data to the central control center, that is, the control unit 40.) So)

According to this, the relay unit is dualized (S1) and S2 (in FIG. 2, the sensing signal relay unit is designated as 'S' for convenience), and two sets of data loggers (D / L) are introduced accordingly.

The hardware specifications of each Data Logger (D / L)

i) CPU: Intel Pentium Dual Core or above, ii) Main Memory: 500MB or above, iii) ODD: DVD COMBO 20x or above, iv) HDD: 80G or above (HDD hard rack installed), v) I / O: PS2 Keyboard, mouse, USB 4port, vi) 10 / 100MBps Ethernet Card or higher specification, vii) Graphic: 32MB SDRAM or above, viii) Power: 300W or above, ix) Monitor: 6.5 "TFT LCD or above, x) Automatic booting when power is restored after disconnection Xi) Ethernet RJ 45 connection, xii) RS232C Serial 2 Port or higher

It is desirable to meet the following conditions.

In addition, the software specifications of each Data Logger (D / L)

i) Collection of real-time measurement values and diagnostic information of odor measuring instruments, ii) Connection specifications: RS232C, iii) Communication method: D / L polling, iv) Acid / base input module control, v) Connection specifications: Digital In, Digital Out, vi) Communication method: contact control by local or remote command, vii) Manual or automatic, viii) Data inquiry (table format, graph format), ix) Real time: Data update every 30 seconds, x) 5 minutes data : 5 minutes data generation and inquiry based on real time data, xi) Time data: 5 hours data generation and inquiry based, xii) Completion: Collecting and querying instrument status data (real time), xiii) Status setting, xiv) Repair Manual setting of state, xv) remote control processing function, xvi) current time change according to time-set, xvii) data transfer in request range according to data retransmission request, xviii) data storage, xix) Keep 5 minutes data for more than 5 months , Xx) log function, xxi) written communications professional with a control system as a file, xxii) the program can be generated in various errors and warnings logged during run

It is desirable to meet the following conditions.

Furthermore, more than three sets of communication networks, especially CDMA networks 40W, for on-line monitoring of the malodor treatment process are provided, and the hardware specifications preferably satisfy the following conditions: i) CDMA radio module, ii) speed 225200 BPS.

 Next, in the chemical cleaning unit 10, that is, the acid cleaning tower 10A and the basic 10B cleaning tower for removing alkaline and acid odors, the spray chemical liquid type, flow rate, and time are controlled according to the contamination state of the incoming odor gas. Digital In / Out control module (DI / DO control module) for the control of acidic acid input module 45 (consisting of pump, flow meter, pressure gauge, etc.) to be controlled by 1) (relay part (S1) side) It is provided.

The hardware specifications are i) Digital In, ii) Port: 4 Port or more, iii) Interface: Separation using an optocoupler, iv) Maximum Input Voltage: 24 V, v) Digital Out, vi) Port: 4 Port or more, vii) Interface: Separating method using relay, viii) Relay capacity: 5A (DC 28V), 10A (AC 125V), 5A (AC 250V), ix) Interface, x) Network Interface, xi) RJ45 connection type

It is desirable to meet the following conditions.

FIG. 21 shows an example of a monitoring screen which can be checked by the monitor of the control unit 40, that is, the control PC 43 provided in the central control center.

The acid / base input module 45 is controlled in the same way as a) Connection specifications: Wireless connection, b) Communication method: Contact control by remote command.

On the other hand, in the monitor of the control PC (43) in the control PC (43)

5) 5 minutes data: 5 minutes data generation and inquiry based on real time data

B) Time data: Create and search time data based on 5 minutes data

C) Status data: collecting and inquiring status data of the meter (real time)

D) Statistical processing such as average value, maximum value and minimum value for time, day, month and year

E) Chart form change trend analysis (including trend analysis)

F) Display format

Data inquiry (table format, graph format) is possible, and an example of the data inquiry display screen is attached to FIG. 12.

Odor treatment system equipped with an odor active monitoring function according to the present invention can be better understood by looking at the following basic design plan.

Basic design plan

[Processing Schematic]

The odor of the organic waste treatment process is divided into general odors and process odors, and conceptualized as follows to be treated according to treatment methods and treatment stages. Generally, it is treated with one-stage chemical cleaning and two-stage biofilters. However, when the odor removal efficiency is low in the basic process or when checking and repairing, the odor is treated by using an activated carbon adsorption tower and finally discharged.

(Summary of processing method)

[Liquid cleaning + Bio filter integrated treatment + Activated carbon adsorption treatment (in emergency)]

Considering that the odorous substance is a composite substance, it was processed in three stages.

(Features of the multi-stage treatment method)

① Stable removal of acid gas and alkaline gas from chemical liquid washing tower.

② Significantly reduce the chemical cost of odor decomposition by introducing electrolysis device.

③ Neutral gas and various odorous substances are removed by using microorganism.

④ If the exhaust filter of biofilter exceeds the standard value or the treatment efficiency of the biofilter is low, the third stage of the adsorption tower is discharged.

⑤ It is possible to cope with various kinds of odors as well as high concentration odors by complementing various methods.

⑥ It can easily cope with the change of concentration by giving flexibility of operation.

⑦ Easy maintenance and convenient handling and operation.

[Odor monitoring system]

By applying the online odor monitoring system for monitoring the treatment efficiency of odor prevention facilities and economic maintenance of odor prevention facilities, it automates the process of supplying water, medicine and nutrients and controls the growth of microorganisms. Online monitoring of odor abatement processes provides the reliability of odor prevention facilities.

(Measurement purpose)

(1) Economical odor treatment maintenance of chemical cleaning tower

(2) Monitoring of normal operation of biofilter and monitoring of odor treatment efficiency

(3) When the biofilter malfunctions or the odor treatment efficiency decreases, the exhaust valve is shut off and the exhaust gas tertiary treatment is determined by the activated carbon adsorption tower.

(4) Providing data to determine the chemical input amount used in the odor prevention facility, the biofilter media replacement cycle, and the activated carbon adsorbent replacement cycle

(5) Minimize odor source in organic waste treatment process using control program

(Odor measurement method)

Totally reducing sulfur compounds such as hydrogen sulfide, methyl mercaptan, methyl sulfide, and methyl disulfide, which are mainly generated in organic waste treatment plants and have high odor intensity and odor contribution, are continuously and automatically measured using total reducing sulfur compounds.

[Table-TRS Sensor Specification]

Measurement principle

Total reducing sulfur compound sensor is a device that thermally oxidizes reducing sulfur compound contained in incoming sample gas, converts it into sulfur dioxide, and measures it. Sulfur dioxide is excited when it encounters ultraviolet (UV) light (SO2 *), and the concentration of sulfur dioxide in the sample gas is measured by the intensity of light generated here. Calibrate the meter using H2S standard gas. The measurement is used with PMT, dark offset, UV lamp ratio, residual light, and sample gas temperature and pressure to calculate final concentration. The calculated concentration values are stored in the instrument's internal data storage system (iDAS Section) and displayed to the user as analog signal outputs and various digital signals and meter screens.

(1) odor measuring point

(2) Inflow part of chemical liquid washing tower: The odor generated from organic waste is measured at the inflow part of the two-stage washing tower, which is the primary odor prevention facility through blower and duct facilities.

(3) Chemical liquid washing tower outlet (biofilter inlet): measuring the odor treated by the two-stage washing tower

(4) Biofilter Outflow Portion: Determination of Odor Treated by Biofilter

(5) Adsorption column outlet part (if necessary): Determination of the concentration of odor discharged from the biofilter when treated by the adsorption tower because it exceeds the standard value.

(6) pH measurement between pickling and alkaline washing in chemical cleaning tower

[Odor prevention facility]

The odor component of odor generated in the treatment plant is installed in front of the bio deodorizer to remove oils and dusts contained in the odor gas, and a chemical liquid deodorizer is installed in order to cool the temperature of the odor gas. It should be applied to the design, manufacture, delivery, test and inspection, installation, and commissioning of the deodorizer installed to discharge odorless as a treatment method, and it should be designed and manufactured according to the following specifications.

[Table-Odor Prevention Facility Specification]

(Design and structure)

This equipment is mainly composed of chemical liquid cleaning deodorizer at the front stage, biofilter deodorizer at the rear stage and activated carbon adsorption tower deodorizer, and chemical liquid cleaning deodorizer installed at the front stage is composed of chemical liquid washing tower and WALK WAY. It consists of supply facilities. The biofilter deodorizer installed at the rear is a structure in which several panels are assembled with stainless bolts, and the filter media made of porous ceramics is inoculated with special microorganisms capable of decomposing odor to remove odor. It is evenly distributed on the front of the filter layer, so that the odor gas is decomposed and manufactured to be exhausted through the stack. Biofilter deodorization system is mainly composed of housing, filter media and water supply device. At the rear end, an activated carbon adsorption tower deodorizer is installed for emergency operation. In addition to these devices, the auxiliary equipment consists of a deodorization suction fan, a differential pressure sensing device, and an on-site control panel.

(Design condition)

The acceptance criteria for the emission odor should be in accordance with Annex 8-3 of Article 12 of the Air Quality Standards Act.

(1) chemical cleaning tower

① Basic composition

A) This equipment is equipped with spray system, WALK WAY, handrail and ladder for maintenance and inspection to reduce the oil and dust contained in the exhaust gas of the waste equipment introduced by the blower.

B) Deodorization tower is made of P.P and FRP, and deodorization tower is equipped with filler inlet, inspection window and manhole, test hole, discharge pipe.

C) Filler uses HILEX-200 (2 “) made of P.P material to improve the contact area efficiency and consists of three stages.

D) The spray system is installed at the top of the filler to distribute the spray water optimally and uniformly to remove dust and lower the temperature. Spray nozzle is made of P.P material with no vane structure and is made of P.P material. It is a structure without clogging and supplies uniform performance and spray phenomenon.

E) The chemical liquid washing tower is circular and is made of P.P to prevent corrosion, and the joint is assembled by stainless bolt, and the deodorizing tower is installed on concrete.

F) The tank of the chemical liquid washing tower and the external exposed pipe are insulated with non-asbestos insulation to prevent freezing during winter.

G) A demister is attached to the top of the chemical cleaning tower to prevent the fine droplets sprayed by the spray nozzle from being discharged into the biofilter. The specifications are as follows.

-Type: P.P WOOL

-Material: P.P

-Specification: ￠ 3,800 × 300H

H) The discharge pipe of the washing tower is made of FRP material or stainless steel (STS304).

I) Circulating pump shall be used for continuous supply to chemical liquid washing tower for dust removal and temperature reduction of inflow gas and shall have the following specifications.

F) The pump is a transverse piece suction volute pump, made of pump, motor, common bed, and other accessories.

K) Casing and impeller of pump should be made of stainless steel (SSC13) and can be transported without blockage. The shape should be open or open in the opposite direction, and the structure with balance hole or back feather to prevent axial thrust.

(5) The main shaft is made of stainless steel (STS304), and the friction part is fitted with a bronze or stainless steel sleeve to fix it as a key.

F) The bearings use grease lubricated ball bearings, and the couplings must be equipped with protective plates and the normal rotation indicators for the safety of the workers.

Bottom bearing bearing life should be more than 30,000 hours.

-Quantity: 2 units (1 spare unit)

-Type: CENTRIFUGAL PUMP

-Size: 0.4 m3 / min x 20mH x 3.7KW x 380V x 3 ￠ x 60HZ

(2) H2SO4 feed pump is used to absorb and remove alkaline odor in the intake odor, and is used to supply to the tank of the chemical liquid washing tower.NaOH supply pump is used to supply chemicals to absorb and remove acid odor in the intake odor. Manufactured to the specifications.

[Table-Chemical Cleaning Tower Specification]

① Chemical Supply Tank

A) Chemical tank is H2SO4, NaOH storage tank, installed on concrete, and designed and manufactured to inject chemical into water tank under chemical cleaning tower by chemical supply pump.

Capacity: 1000L

Material: P.E

Quantity: 2SET

B) Chemical tank material is PE granular cylindrical shape, installed on concrete, and storing H2SO4 (-12% sulfuric acid) and NaOH (20% caustic soda) respectively so that it can be supplied into the tank of chemical cleaning tower.

C) Piping material shall be made of PVC for water.

D) Install the oil level gauge on the outside and install the buoy moving in the transparent pipe according to the water level change so that the water level change can be clearly seen.

E) A flange for attaching a level switch to the top of the tank, and a nozzle for draining the stock can be attached to the pump mount and the bottom.

(1) biofilter

① Basic composition

A) The housing is a square panel assembly type, which is manufactured in the form of FRP panel composed mainly of unsaturated ester resin and glass fiber and assembled and installed on site.

B) It should be excellent in workability without being greatly influenced by the installation space, and it should be assembled on site by stainless steel bolt (STS304).

C) The housing shall be kept warm and the inside shall be designed for easy maintenance.

D) The housing shall be made on the concrete base by making the width 2,000mm, the length 2500mm and the height 3,000mm. (Excluding foundation work)

E) A round manhole of # 800 shall be provided on the upper part of the housing to facilitate sampling and inspection of the internal media.

F) The carrier support shall be installed with a structure and a certain distance that can be assembled and disassembled, and a lattice should be installed below to support the net. The net and lattice are to be made of corrosion-resistant materials so that corrosion does not occur even after long-term operation.

② Body

① Microbial media have high odor removal efficiency, durability, homogeneity of filter media, optimal growth conditions of microorganisms, buffer ability against temperature and PH value ups and downs, self pH control ability, viability at system shutdown, and self humidity control ability. It must have a function. The media should be porous ceramics to prevent them from being broken by consolidation. The height of the media should be maintained in its own support even if it is filled to a height of 1 to 1.5 m. Media consisting solely of minerals is not allowed.

② The pressure loss that occurs in the median layer is about 50mmAq / m or less, and it is possible to retain proper moisture to maximize the efficiency of deodorization. Plate, block and columnar structures are not allowed in consideration of the compression and deodorization efficiency.

③ Only the microorganisms suitable for odor are inoculated and cultivated in organic media, so it does not need a separate drug supply or nutrient supply device, and the microorganisms should not be extinguished even if time or environment changes occur temporarily.

④ Bio filter is composed of filter media layer composed of polyester, air distribution device, water spraying device, and odor gas saturated with water should be evenly dispersed in media layer to be biologically decomposed.

⑤ Microorganisms are inoculated directly into the media with a few nutrients or through a tank.

③ Water supply device

A) This device should be composed of water tank, feed water pump, spray nozzle, and related pipes to keep the operating condition of the bio filter in optimum condition.

B) The water tank shall be designed with the capacity to circulate 5 minutes of the water supply, and should be equipped with a level switch to maintain the water level in the water tank and to maintain the winter temperature.

C) Water uses fresh and filtered water and should be operated by timer to control the operation of feed water pump for proper humidity.

D) The water supply pump is a submersible pump and supplies two units including a preliminary pump. It is installed inside the tank with a rigid structure to withstand continuous operation.

E) Sprinkling system for transferring odor gas to biofilm where biological reaction takes place is provided with water supply pipe and spray nozzle in the upper part of deodorization tower, and sprayed on media through water feed pump to make it wet well.

F) In order to warm up the spray pipe during the winter season, attach a heating device to the water tank and insulate the external exposed pipe connected to the water tank with non-asbestos insulation.

G) Supply water level valve, level switch and related piping so that water can be supplied automatically.

④ Differential pressure sensing device

A) It shall have a circuit which can stop operation for the protection of blower and other accessories when the differential pressure exceeding the set value is detected by detecting the pressure of odor gas and processing gas flowing into the biofilter.

B) The differential pressure gauge (with differential pressure switch) shall be built in the control panel for identification and shall be configured to measure the differential pressure on the suction and discharge sides of the biofilter.

⑤ Feed pump

A) The feed water pump is used to supply the spray water for maintaining the humidity of the biofilter and forming the biofilm.

[Table-Water Pump Specification]

A) Casing and impeller of feed water pump should be uniform thickness and free of bubbles and cracks, and made of stainless steel (STS304) considering corrosion wear.

B) The main shaft extends to the motor shaft, and the screw of the main shaft should be in the direction that the nut does not loosen during operation or to prevent the nut from loosening with a washer or the like.

C) Rotating weight and thrust thrust shall be supported by bearing built in motor, and it is structured to endure long time continuous operation and to self-lubricate.

① Field control board

A) The site control panel shall be constructed and manufactured as a system that can control the normal operation of the biological deodorizer such as start and stop of the deodorization fan and water supply system, temperature control, and control of the differential pressure sensing device.

B) As a self-supporting type, manual and interlocking operation should be possible, and supply and install the power cable and control cable (including piping) from the operation panel of the system to the equipment.

C) The housing of the site control panel is made of stainless steel (STS 304).

D) Components of the control panel Independent field control panels shall be provided with the following functions to achieve the above functions. The control panel shall be provided with various fuses, Breca, electronic contactors, auxiliary relays, space heaters, switches and necessary accessories. In addition, a separate terminal for operating, stopping, and transmitting fault information signal should be provided in the central control room.

-Voltmeter, Ammeter

-Manual / automatic operation selection switch

-Start / stop switch and indicator lamp

-Fault indicator

② Piping

A) Mechanical plumbing includes spray nozzles, water supply, drain pipes and associated pipes. PVC or STS products are used, and valves with butterfly valves of 50A or more are used. Plumbing work shall be provided with flanges and unions where necessary to allow disassembly.

B) The deodorizing duct pipe is made of FRP, and the joint of the pipe should be airtight with gasket to prevent leakage.

C) Pipe supporters should be arranged at appropriate intervals to prevent deflection of the pipes.

D) Material used

Housing FRP

Control panel STS 304

Water Supply Line STS 304 And PVC Pipe

(1) activated carbon adsorption tower

① Part structure

A) The main body of the tower shall be in the form of a stationary equation and shall be P.P.

B) The main body shall be provided with an intake gas inlet flange, an adsorbent accommodating part, an adsorbent inlet, an outlet, and the like.

C) A sampling port shall be provided at the inlet and outlet of the intake gas, and an outlet of the adsorbent shall be installed at an appropriate position.

D) The filling part of the adsorbent shall be divided into three parts by corrosion-resistant material, and an inlet and an outlet for each layer shall be provided. Depending on the size of the tower, more than one should be installed in the inlet and outlet in consideration of workability.

E) Manometer for pressure loss measurement shall be installed in the adsorption tower.

F) A chain block I-beam of 1 ton capacity is installed at the top of the main body for replacement and maintenance of adsorbent.

G) Install a drain pipe in a suitable place in the adsorption tower.

H) In selecting the adsorbent, pay attention to the following.

I) The hardness of adsorbent on activated carbon base shall be in accordance with KS M 1201 / KS M1802 test method, the required hardness should be more than 90%, and the target value should be 98%.

Car parts structure

Body P.P

Cartridge STS 304

Bolt, Nut STS 304 (Disassembly & Anchor Bolt)

② Deodorization Fan

A) Deodorization fan is installed at the front end of chemical liquid deodorizer to inhale odor gas. It should be horizontal discharge type for horizontal suction and meet the following specifications.

[Table-Specification of Deodorizing Fan]

A) It should be structured with low vibration and noise and withstanding continuous operation for 24 hours.

B) The type should be single-suction turbofan, and the impeller should be made of stainless steel or corrosion-resistant material, and have good rotational balance, low noise, vibration and efficient impeller and withstand continuous operation for 24 hours.

C) The shaft shall be carbon steel (lining equivalent to the rotor) or stainless steel.

D) Casing is made of stainless steel or corrosion resistant material (more than 3t of FRP lining) and is of solid construction.

E) Seal the part where the shaft passes through the casing to prevent leakage of odor gas.

F) The fan motor is mounted on a common stand and driven by a V-belt.

G) Expansion joint pipe shall be installed on the fan suction side.

H) A drain valve is to be provided at the bottom of the casing to discharge condensate.

I) Install vibration pads on the common stand so that there is no vibration in the structure.

B) The safety cover is installed on the shaft and the oil supply of the bearing is supplied from the shaft.

(Performance guarantee)

end. Compound odor (air dilution sensory method-other regions)

I. Specified Odor Substances (Instrument Analysis-Other Regions): Sampling location 1 m

All. Concentrations of Major Odor Substances (Final discharge management criteria)

* However, the above-mentioned outlet management standard concentration is based on facility renovation and special cases.

Cost planning

[Initial equipment cost]

(Cost by major process)

[Detailed cost]

(Chemical liquid washing tower)

(Bio filter)

(Activated carbon adsorption tower)

(Deodorization fan and duct piping)

(Odor Monitoring System)

[Maintenance cost]

(Electricity cost)

(Usage of drugs, adsorbents and nutrients)

(Water consumption)

In the above description, various and specific processes of the continuous biological water treatment method or the batch biological water treatment method, detailed description of the material, dimensions, etc. of the cover forming the odor collecting means, and sensors for measuring various components of the odor Although the conventional well-known techniques related to the type of, the specific chemical liquid component of the chemical cleaning unit, the type of microorganism and media applied to the biofilter unit, the specific use of the adsorption unit, etc. are omitted, those skilled in the art can easily infer, infer, and reproduce them. can do.

In addition, in the above description of the present invention, the present invention has been described with reference to the attached drawings based on odor treatment means having a specific configuration and arrangement. However, the present invention may be variously modified, changed, and replaced by those skilled in the art. It should be interpreted as falling within the protection scope of the present invention.

T0: flow adjusting tank T1: anaerobic tank
T2: anaerobic tank T3: aeration tank
T4: Sedimentation tank C: Odor collection means
A: Odor treatment means P: Odor source
A1: intake section A2a, A2b: exhaust section
10,10A, 10B; Chemical cleaning unit 11: Median layer
13; Injection nozzle 15: chemical tank
20: biofilter unit 30: adsorption treatment unit
40: control unit 40S: control system
S1a, S1b, S1c, S2a, S2b: Sensor

Claims (4)

A reaction tank (T1) to which the aeration and aeration steps are repeatedly applied; And
Odor trap means comprising a cover for covering the upper portion of the reaction tank (T1);
Including but not limited to,
In the abandonment stage, odor gas is collected,
The malodor collecting means has a malodor processing means (A),
The odor treatment means (A) comprises a chemical liquid cleaning processing unit 10,
The media cleaning layer 10 is formed in the chemical cleaning unit 10,
Regeneration stirring means 19 is provided between the upper and lower perforated plates of the media layer 11,
The regeneration stirring means 19
A motor 19C, a rotary shaft 19A connected directly to the motor 19C or via a speed reducer,
Made of a stirring blade (19B) protruding coupled to the outer peripheral surface of the rotary shaft (19A),
The stirring wing is composed of an inner tube and an outer tube,
Batch biological water treatment system, characterized in that each of the inner tube and the outer tube is provided with a drain hole. The method of claim 1,
Odor gas collection is a batch biological water treatment system, characterized in that 60 minutes of the initial stage of aeration. 3. The method of claim 2,
Odor gas collection is a batch biological water treatment system, characterized in that proceed for the first 40 minutes. The method according to any one of claims 1 to 3,
Odor gas collection is a batch biological water treatment system, characterized in that proceeds for the first 30 minutes.

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