CN113651430A - Method and device for biologically treating domestic garbage leachate and stink - Google Patents
Method and device for biologically treating domestic garbage leachate and stink Download PDFInfo
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Classifications
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/346—Controlling the process
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- B01D—SEPARATION
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
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- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Molecular Biology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method and a device for treating domestic garbage leachate and malodorous organisms, wherein the device comprises a probiotic storage tank, a tank valve, a control cabinet, a small-sized gas monitoring station, a gas detection module, a delivery pump and an atomization device which are sequentially connected through a delivery pipeline; after the atomization device is started, the air supply device is started instantly under the control of the air supply device adapter, air flow from the air supply device is guided to enter the atomization device, meanwhile, the motor controls the rotary liquid atomizer device to start running, the rotary liquid atomizer device is used for converting liquid into liquid drops with sub-millimeter size to be sprayed outwards, and an atomization angle regulator arranged at the end part of the atomization device can be manually or automatically regulated to ensure the adjustability of an atomization direction and an atomization angle, so that the atomization liquid drops guide the atomizer upwards or downwards relative to the direction of the air flow to accurately spray probiotics to a target position; the invention can be effectively applied to the treatment of the domestic garbage percolate and the fetor and realizes the recycling of resources.
Description
Technical Field
The invention belongs to the technical field of waste treatment, particularly relates to treatment of domestic garbage leachate and landfill garbage leachate, and relates to a method and a device for treating garbage leachate and odor by using a composite probiotic group.
Background
At present, with the continuous development of the urbanization process, the existing and generated problems of the garbage are increasingly serious, but due to the technology, capital and other reasons, the garbage treatment and disposal in China will mainly adopt the landfill technology in the next decades. At present, municipal domestic waste in China is treated by adopting modes of landfill, composting, incineration and the like, the total treatment rate is only 58.2 percent, and the stockpiling quantity of the waste which cannot be treated reaches more than 60 hundred million tons. According to statistics, more than 400 cities (comprising 2/3 total cities in the country) in the country are surrounded by garbage, and the living environment and health of the urban and suburban residents are seriously threatened.
During the process of stacking and landfill, a large amount of sewage, namely landfill leachate, is filtered out due to fermentation, shower and washing of rainwater and soaking of surface water and underground water, and is one of the main reasons for secondary pollution in the process of landfill. The landfill leachate contains a large amount of organic matters which are difficult to be biochemically degraded, is one of the most difficult high-concentration organic wastewater to be treated in the world, is characterized by various and extremely complex pollutant components, high concentration and large property change, contains a large amount of toxic organic pollutants which are difficult to biodegrade, high in metal content, bioaccumulative and three-cause effect, has great treatment difficulty, and becomes one of important factors for seriously polluting soil, surface water and underground water. If not properly treated, it will cause serious pollution to the surrounding environment and groundwater, and the pollution will last for decades or even hundreds of years.
In addition, the landfill leachate contains a large amount of carbohydrates and nitrogenous organic matters, is insufficient in dissolved oxygen and is in an anaerobic or facultative anaerobic environment, and various malodorous substances such as methane, ammonia, mercaptan, hydrogen sulfide and the like can be formed. These gases are relatively volatile and easily diffuse into the atmosphere, and some gases are toxic and have a strong pungent odor. The garbage leachate also emits odor and propagates mosquitoes and flies.
With the increasing environmental problems in the world, the probiotics serving as a multifunctional biological agent has wider and wider application in the field of environmental protection, can be applied to the aspects of sewage treatment, air purification, soil improvement, organic matter decomposition and conversion promotion, environmental malodor elimination, resource recycling and the like, can adapt to the change of water quality and water quantity due to unique superiority, can play a greater role in the subsequent biochemical treatment process of wastewater, and has great application potential.
CN200910064852.6 discloses a composite probiotic for environmental remediation and a preparation method and application thereof, wherein the composite probiotic can also be prepared from the following strains in parts by weight: the proportions of photosynthetic bacteria, lactic acid bacteria, bacillus, actinomycetes, saccharomycetes and filamentous fungi are respectively 1-5, 1-3, 0.5-1.5, 1.0-1.4, 0.6-1.0 and 1-5, wherein the viable bacteria content of the photosynthetic bacteria, the lactic acid bacteria, the bacillus, the actinomycetes, the saccharomycetes and the filamentous fungi is 18-26 hundred million/ml. The action mechanism of the invention is that probiotics is taken as the leading factor, the probiotics and other beneficial microorganisms are cooperated to generate antioxidant substances, and the oxidation organic substances are decomposed and oxidized through oxidation, reduction, fermentation and other ways, so that the harmful and toxic substances are converted into harmless and nontoxic substances, and the harmful substances are changed into useful substances. The method has wide application prospect and low cost in the environmental protection fields of toilet deodorization, domestic garbage utilization, treatment of foul lake dead water, tap water, swimming pool purification and the like.
CN201710126408.7 discloses a nano organic feed and a preparation method thereof, comprising the following steps: organic waste is selected as a raw material for preparing the nano organic feed. The organic waste comprises industrial organic waste, agricultural inorganic waste, urban household garbage and the like. Wherein the industrial organic waste comprises: molasses liquid and yeast liquid, etc. Agricultural organic waste includes: livestock and poultry manure, biogas slurry and biogas residues, crop straws, sawdust, vegetable and fruit residues, dreg and cake dregs, mushroom residues, earthworm manure and the like. The urban domestic garbage comprises: kitchen waste and the like. The raw materials are all organic raw materials and have good raw material basis. Preferably, the organic waste without impurities is selected as a raw material for preparing the nano organic feed. It is also understood that the organic waste is selected and then sorted to remove impurities contained therein. Sorting and impurity removing are to remove waste metal, waste plastic, waste glass, waste battery, ceramic stone and the like in the organic waste, and then the organic waste without impurities can be obtained. In order to prevent the organic waste from carrying odor, first compound probiotics are added into the organic waste, and the first compound probiotics kill microorganisms and putrefying bacteria in the organic waste, so that the odor is removed. In the process, the dosage of the first composite probiotics is not limited, and the deodorizing effect and the cost are ensured to be the lowest. The first composite probiotic bacteria comprise lactic acid bacteria, bacillus, yeast, cellulase and glucanase. It is understood that the first composite probiotic is a mixed species of any proportion of the plurality of active probiotics described above. And (4) grinding the deodorized organic waste into pulp to obtain pulp. Specifically, the organic waste and water are mixed according to a mass ratio of 1: 1-8, adding the mixed slurry into a colloid mill or a cone mill, and grinding the organic waste material in the slurry to 5-10 mu m particles. However, the above prior art does not relate to a treatment device for biological treatment of domestic garbage leachate and malodor, and does not have a device for biological treatment of domestic garbage leachate and malodor, so that the composite probiotics can be uniformly sprayed on garbage, and the efficiency and pertinence are low.
Disclosure of Invention
Aiming at the problems, the invention aims to solve the problem that the current landfill leachate generates secondary pollution to the environment, provides a method for treating the landfill leachate and performing odor biological treatment by using a composite probiotic group, develops a preparation method and a process of composite probiotic, and invents a spraying device for treating the landfill leachate and performing odor biological treatment by using the composite probiotic group so as to solve the problem of secondary pollution generated by garbage.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a device that is used for domestic waste filtration liquid and foul smell biological treatment which characterized in that: comprises a probiotic storage tank (1), a tank body valve (2), a control cabinet (4), a small-sized gas monitoring device (5), a gas detection module (6), a delivery pump (7) and an atomization device (8) which are sequentially connected through a delivery pipeline (3);
preferably, a steel pipe with threads at one end is welded on the end face of the probiotic storage tank (1) and is connected with a tank valve (2) by utilizing friction force between the threads, the tank valve (2) is of a type with threads at both ends, so that the tank valve is conveniently connected with a probiotic conveying pipeline (3), the input end and the output end of a conveying pump (7) are both provided with threads, the input end is connected with the tank valve (2) by the conveying pipeline (3), and the output end is connected with the conveying pipeline (3) connected with an atomizing device (8);
the control cabinet (4) is connected with the small gas monitoring device (5) through a data line and a power line, the gas detection module (6) is connected with a computer of the small gas monitoring device (5) to generate a numerical value signal of gas content, the control cabinet (4) is connected with the delivery pump (7) through a line to control the starting and rotating speed of the delivery pump (7), and the delivery pipelines (3) provided with the atomization device (8) are connected in series with each other through elbows with threads and tee joints;
the atomization device (8) is fixed in the middle of the tee joint through a locking device, and finally a complete closed loop is formed.
Preferably, the atomizing device (8) comprises an air supply device (9), an air supply device adapter (10), a motor (11), a rotary atomizer (12), and an atomizing angle adjuster (13).
Preferably, the air supply device (9) is installed on the shell of the atomization device through a connecting hook, the air supply device adapter (10) is tightly fixed at the upper end of the air supply device (9) through a bolt, the motor (11) is installed on a support of a sleeve inside the atomization device and is tightly protected by a waterproof cover, the normal work of the motor (11) is prevented from being influenced by solution or humid air, the motor (11) is connected with an external power supply through a waterproof wire, the shaft end of the motor (11) is connected with the rotary atomizer (12) and provides rotary power for the atomization device, the atomization and spraying purposes are achieved, and the atomization angle regulator (13) is installed on the shell of the atomization device in a ball hinge connection mode.
Preferably, the method for the domestic garbage leachate and malodorous biological treatment comprises the following steps:
1) filling the cultured probiotics into a probiotic storage tank with constant temperature and moderate pH value according to a certain proportion (1) to ensure the maximum activity of the probiotics;
2) opening a valve (2) connected with the tank body; the valve (2) is made of alloy materials, so that probiotics can smoothly flow out of the storage tank, enter the conveying pipeline (3) and control the flow;
3) starting a control cabinet (4) and a small gas monitoring station (5); switch board (4) and small-size gaseous detection station (5) interconnection, connect the simultaneous self-starting of delivery pump on pipeline (3) when both start, and receive its control, monitoring module (6) in small-size gaseous monitoring station (5) can be through VOC, NH in the gaseous detection device automated inspection rubbish station environment3、H2S and other harmful gas content values, the types and the content of the gases are displayed on a display, and the quantity values are converted into signals in a gas detection station (5) and transmitted to a control cabinet (4) for further analysis;
a computer in the control cabinet (4) automatically analyzes and forms an instruction to control the start and stop and the rotating speed of the delivery pump (7), so as to control the flowing speed of the probiotic solution in the delivery pipeline (3), meanwhile, the running signal of the delivery pump (7) is fed back to the small-sized gas detection station (5), the type and the content value of harmful gas are continuously detected by the gas monitoring module (6), and the continuous work among the control cabinet (4), the gas detection station (5) and the delivery pump is realized;
4) adjusting the atomization mode and the spraying angle of the atomization device (8) according to different working environments and actual conditions;
after the atomizing device (8) is started, the air supply device (9) is started instantly under the control of the air supply device adapter (10) to guide air flow from the air supply device (9) to enter the atomizing device, meanwhile, the motor (11) controls the rotary liquid atomizer device (12) to start running for converting liquid into liquid drops with sub-millimeter size to be sprayed outwards, and an atomizing angle regulator (13) which is arranged at the end part of the atomizing device and is used for ensuring the adjustability of an atomizing direction and an atomizing angle can be manually or automatically adjusted, so that the atomizing liquid drops guide the atomizer upwards or downwards relative to the direction of the air flow to accurately spray probiotics to a target position.
Preferably, in step 1), the following three processes are specifically included:
(1) screening, culturing and preparing the composite probiotic group;
(2) optimizing the condition of treating the landfill leachate by the compound microbial flora; analyzing the influence of the composite probiotic group on the treatment effect of the landfill leachate under different reaction time, different aeration time, different inoculation amount and different pH values;
(3) researching the effect of the composite probiotic group on the landfill leachate treatment; namely, the landfill leachate is treated by utilizing a compound probiotic liquid preparation;
and analyzing the change of the general characteristics of the leachate in the degradation process, and determining various main influence indexes to analyze the treatment effect of the composite probiotic liquid on the landfill leachate and optimize the optimal parameters for treating the landfill leachate.
Preferably, in the process (2), the prepared composite probiotics are subjected to activation treatment, the treatment effects of the bacteria liquid in different adding modes (direct adding, adding after sterilization and no adding) are detected, the adding mode with the best effect is screened out, and the optimal proportioning condition is further determined so as to meet the requirement of landfill leachate treatment under natural conditions;
in the process (3), the screened compound microbial inoculum is combined with a traditional biochemical method to carry out advanced treatment on the leachate, determine the optimal proportioning condition, and the optimal proportioning condition is used for treating the landfill leachate to ensure that the landfill leachate meets the treatment requirements of indexes such as carbon element, nitrogen element, phosphorus element, odor and the like, wherein the main influence indexes are one or more of SS, COD, BOD5, NH3-N and odor.
Preferably, in the process (1), the following steps are specifically included:
1) carrying out three-stage strain propagation;
2) the comprehensive liquid culture medium for the communicated large tank is developed, and multi-strain compound fermentation is carried out within a proper temperature range;
3) and (5) performing product split charging in a purification workshop.
The technical scheme of the invention at least has the following advantages and beneficial effects:
1. the invention utilizes the composite probiotic method to solve the problems that a large amount of carbohydrates and nitrogenous organic matters exist in the landfill leachate, the dissolved oxygen is insufficient, various malodorous substances can be formed in an anaerobic or facultative anaerobic environment, the gas volatility is high, the gas is easy to diffuse into the atmosphere, and part of the gas is toxic and has large pungent smell.
2. The invention can meet the requirements of different sites and work to the maximum extent by adjusting the atomization mode, the atomization speed, the spraying angle and the like of the atomization device under the conditions of different working environments, working spaces, different contents of generated harmful gases and harmful gases of the garbage recycling station, and pursuit of the highest economic benefit.
3. The device for treating the domestic garbage percolate and the malodorous organisms uses the atomizing device and the atomizing angle regulator, so that the composite probiotics can be uniformly sprayed on the garbage, the efficiency of treating the garbage percolate by the composite probiotics is greatly improved, the system has good operability, and the composite probiotics can be automatically sprayed according to the content of gas components in the garbage percolate.
Drawings
FIG. 1 is a process flow diagram of the method for treating landfill leachate with composite probiotics according to the present invention;
FIG. 2 is a flow chart of a process for producing the composite probiotic preparation of the present invention;
FIG. 3 is a schematic view of fermentation of a composite probiotic formulation in a communicating tank of the present invention;
FIG. 4 is a graph showing the concentration of ammonia and hydrogen sulfide in 60min after spraying the composite probiotics prepared by the present invention and clear water on landfill leachate;
FIG. 5 is a graph showing the concentration of ammonia and hydrogen sulfide in 60min after spraying the composite probiotics prepared by the present invention and clear water on landfill leachate;
FIG. 6 is a diagram of the apparatus for the biological treatment of leachate and malodor of domestic waste according to the present invention;
FIG. 7 is a three-dimensional view of a gas detection module of the present invention;
FIG. 8 is a three-dimensional view of an atomizing device of the present invention;
wherein, the part names corresponding to the reference numbers are as follows:
1. a probiotic storage tank; 2. a tank valve; 3. a delivery conduit; 4. a control cabinet; 5. the small gas monitoring station 6 and the gas detection module; 7. a delivery pump; 8. an atomizing device; 9. an air supply device 10, an air supply device adapter 11, a motor 12, a rotary atomizer 13, an atomization angle adjuster;
Detailed Description
The invention is described below with reference to the accompanying drawings and specific embodiments.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments.
Thus, the following detailed description of the embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely representative of some embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used. Such terms are merely used to facilitate describing the invention and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
It should also be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1 to 3, as a preferred embodiment of the present invention, the present invention relates to a method for the biological treatment of leachate and malodor of domestic garbage, comprising the steps of:
1) filling the cultured probiotics into a probiotic storage tank 1 with constant temperature and moderate pH value according to a certain proportion to ensure the maximum activity of the probiotics;
2) opening a valve 2 connected with the tank body; the valve 2 is made of alloy materials, so that probiotics can smoothly flow out of the storage tank and enter the conveying pipeline 3, and the flow is controlled;
3) starting a control cabinet 4 and a small gas monitoring station 5; the control cabinet 4 and the small-sized gas detection station 5 are interconnected, the conveying pump connected to the conveying pipeline 3 is started up automatically and simultaneously when the two are started up, the monitoring module 6 in the small-sized gas detection station 5 is controlled by the conveying pump, VOC and NH in the environment of the garbage station can be detected automatically through the gas detection device3、H2S, displaying the content value of harmful gases on a display, converting the quantity value into a signal in a gas detection station 5, and transmitting the signal to a control cabinet 4 for further analysis;
a computer in the control cabinet 4 automatically analyzes and forms an instruction to control the start and stop and the rotating speed of the delivery pump 7, so as to control the flowing speed of the probiotic solution in the delivery pipeline 3, meanwhile, an operating signal of the delivery pump 7 is fed back to the small gas detection station 5, the type and the content value of harmful gas are continuously detected by the gas monitoring module 6, and the continuous work among the control cabinet 4, the gas detection station 5 and the delivery pump is realized;
4) adjusting the atomization mode and the spraying angle of the atomization device 8 according to different working environments and actual conditions;
the air supply device 9 is instantaneously started under the control of the air supply device adapter 10 after the atomization device 8 is started, air flow from the air supply device 9 is guided to enter the atomization device, meanwhile, the motor 11 controls the rotary liquid atomizer device 12 to start running, the liquid is converted into liquid drops with sub-millimeter size to be sprayed outwards, and an atomization angle regulator 13 which is arranged at the end part of the atomization device and used for ensuring the adjustability of the atomization direction and the atomization angle can be manually or automatically adjusted, so that the atomization liquid drops guide the atomizer upwards or downwards relative to the direction of the air flow to accurately spray probiotics to a target position.
As a preferred embodiment of the present invention, in step 1), the following three processes are specifically included:
(1) screening, culturing and preparing the composite probiotic group. The living and breeding microorganisms in the refuse landfill can degrade organic pollutants in the percolate.
However, the degradation speed is not the same in the whole degradation stage, and the decomposition of harmful substances in the landfill leachate by utilizing soil dominant microorganisms is started to become one of the main methods for treating the landfill leachate. By adopting MiSeq high-throughput sequencing technology, the diversity of microorganisms in soil affected by landfill leachate from different regions is analyzed and researched, dominant bacteria for treating the landfill leachate are screened out, and theoretical guidance and technical support are provided for screening out microbial strains with garbage degradation capacity. The specific process of separating new species of microorganism can be roughly divided into the steps of sampling, sample processing, enrichment culture, separation culture, purification, performance determination, strain identification and the like. The composite probiotics mainly comprises lactobacillus, yeast, bacillus subtilis and other dozens of bacteria.
At present, the production process of the microbial preparation mainly comprises two processes: solid surface fermentation and large tank liquid fermentation. Solid surface fermentation: is prepared by proportionally mixing bacterial sludge cultured on the surface of solid with carrier and drying. The method has low yield, high labor intensity, easy contamination by mixed bacteria, poor product quality and is not suitable for industrial production.
However, we have used large tank liquid fermentation. The production process flow of the compound probiotic preparation is divided into three steps (see figure 2): firstly, three-stage strain propagation is carried out;
secondly, a comprehensive liquid culture medium for a communicated large tank is developed, and multi-strain compound fermentation is carried out within a proper temperature range (see figure 3); the fermentation method not only saves energy and labor, but also reduces the links of product pollution, the strains are uniformly distributed in the fermentation and propagation processes, and the quality of the terminal product is good;
and thirdly, performing product split charging in a purification workshop.
(2) And optimizing the condition of treating the landfill leachate by the compound microbial flora. During the process of stacking and landfill treatment of the garbage, various metabolites and moisture are generated due to anaerobic fermentation, organic matter decomposition, groundwater immersion and the like, and leachate is formed.
The rather complex composition thereof makes the treatment of percolate still a very delicate problem, and therefore the optimal control of the test methods and conditions is of particular importance for its treatment. And analyzing the influence of the composite probiotic group on the treatment effect of the landfill leachate under different reaction time, different aeration time, different inoculation amount and different pH values.
(3) Researching the effect of the composite probiotic group on the landfill leachate treatment; namely, the landfill leachate is treated by utilizing a compound probiotic liquid preparation;
the change of the general characteristics of the leachate in the degradation process is analyzed, and various main influence indexes (such as SS, COD, BOD5, NH3-N, odor and the like) are determined, so that the treatment effect of the composite probiotic liquid on the landfill leachate is analyzed, and the optimal parameters for treating the landfill leachate are optimized.
As a preferred embodiment of the invention, the experiment specifically carried out on the treatment effect of the composite probiotic flora on the landfill leachate comprises the following steps:
1) the principle of deodorizing malodorous gas by the composite probiotic preparation is as follows: under the condition of water, microorganism and oxygen, the odor generating substance is oxidized and decomposed by utilizing the metabolism of the microorganism, so as to achieve the aim of purifying the gas; biological treatment can be roughly divided into 3 processes: the odor generating substance is adsorbed by the carrier (microorganism is fixed); the odor generating substance diffuses to the surface of the microorganism and is adsorbed by the microorganism; the microorganisms oxidize and decompose the smelly substances.
Furthermore, due to the combined action of multiple microorganisms, the compound probiotic preparation is more favorable for absorbing and decomposing harmful gases with foul odor, such as S02, H2S, CH4 and the like, which are generated, so that nitrogen-free malodorous substances are decomposed into CO and H20; the sulfur-containing malodorous substances are decomposed into S, SO3 and SO 4; the nitrogen-containing malodorous substances are decomposed into NH and NO, and the substances which generate malodorous gases during decomposition are degraded fundamentally.
2) In the experiment, the composite probiotics and clear water are respectively sprayed on the landfill leachate, and the concentrations of ammonia gas and hydrogen sulfide are tested for 0min, 10min, 30min and 60 min.
Specific experimental protocols and results are shown in tables 1-2 below, and in FIGS. 4-5.
TABLE 1
TABLE 2
3) And comparing the experimental results to obtain an experimental conclusion.
The experimental results show that: for ammonia, the ammonia concentration is reduced after spraying the composite probiotics and spraying clear water, the maximum difference value of the ammonia concentration reduction after spraying the clear water is 10.64ppm, and the maximum difference value of the ammonia concentration reduction after spraying the probiotics is 20.91 ppm.
For hydrogen sulfide, the concentration of hydrogen sulfide is reduced after spraying the composite probiotics and spraying clear water, the maximum difference of the reduction of the concentration of hydrogen sulfide after spraying the clear water is 1.6ppm, and the maximum difference of the reduction of the concentration of hydrogen sulfide after spraying the probiotics is 3 ppm.
According to the experimental result, the reduction amount of the ammonia gas concentration and the hydrogen sulfide concentration after the composite probiotics is sprayed is far larger than that of the clear water, and the composite probiotics is proved to have an obvious effect on the deodorization of the landfill leachate.
As shown in fig. 6-8, further, in order to realize the industrial application of the complex probiotics in the landfill leachate, a set of complex probiotics group for the landfill leachate and the odor biological treatment spraying device is developed:
the specific invention content is as follows: a device for automatically spraying composite probiotics according to the content of gas components in garbage leachate, namely a device for biologically treating household garbage leachate and stink, comprises a probiotic storage tank 1, a tank body valve 2, a conveying pipeline 3, a control cabinet 4, a small gas monitoring device 5, a gas detection module 6, a conveying pump 7 and an atomization device 8 which are sequentially connected through a conveying pipeline 3;
as a preferred embodiment of the invention, a steel pipe with threads at one end is welded on the end face of a probiotic storage tank 1 and is connected with a tank valve 2 by utilizing friction force between the threads, the tank valve 2 is in a threaded type at both ends, so that the tank valve is conveniently connected with a probiotic conveying pipeline 3, the input end and the output end of a conveying pump 7 are both provided with threads, the input end is connected with the tank valve 2 by the conveying pipeline 3, and the output end is connected with the conveying pipeline 3 connected with an atomizing device 8;
the control cabinet 4 is connected with the small-sized gas monitoring device 5 through a data line and a power line, the gas detection module 6 is connected with a computer of the small-sized gas monitoring device 5 to generate a numerical signal of gas content, the control cabinet 4 is connected with the delivery pump 7 through a line to control the starting and the rotating speed of the delivery pump 7, and the delivery pipelines 3 provided with the atomizing devices 8 are mutually connected in series through threaded elbows and tee joints;
the atomization device 8 is fixed in the middle of the tee joint through a locking device, and finally a complete closed loop is formed.
The atomizing device 8 includes an air supply device 9, an air supply device 10, an air supply device adaptor 11, a motor 12, a rotary atomizer 13, and an atomizing angle adjuster as a preferred embodiment of the present invention.
As a preferred embodiment of the present invention, the air supply device 9 is installed on the housing of the atomizer through a connection hook, the air supply device adapter 10 is tightly fixed on the upper end of the air supply device 9 through a bolt, the motor 11 is installed on the bracket of the inner sleeve of the atomizer and tightly protected by a waterproof cover to prevent the solution or humid air from affecting the normal operation of the motor 11, the motor 11 is connected with an external power supply through a waterproof wire, the shaft end of the motor 11 is connected with the rotary atomizer 12 and provides rotary power for the atomizer to achieve the purpose of atomization and spraying, and the atomization angle adjuster 13 is installed on the housing of the atomizer through a ball-and-socket connection.
The embodiment of the invention also relates to a method for biologically treating the domestic garbage percolate and the stink, which comprises the following steps:
1) filling the cultured probiotics into a probiotic storage tank 1 with constant temperature and moderate pH value according to a certain proportion to ensure the maximum activity of the probiotics;
the probiotics are easy to be affected by the environment in the natural environment and are inactivated, so that the probiotics are stored in the probiotics storage tank 1 with constant temperature and moderate pH value, the activity of the probiotics can be kept for a long time, meanwhile, the probiotics can be self-propagated and prepared in the tank, complex steps of manual repeated preparation are omitted, and manual long-time and long-distance transportation is facilitated.
2) The valve 2 connected with the tank body is opened, the valve 2 is made of alloy materials, so that probiotics can smoothly flow out of the probiotic storage tank 1 and enter the conveying pipeline 3, the flow is controlled, the probiotic storage tank can be used for a long time, and the pipeline maintenance is convenient;
3) starting a control cabinet 4 and a small gas monitoring station 5; the control cabinet 4 and the small-sized gas detection station 5 are interconnected, when the control cabinet and the small-sized gas detection station are started, the conveying pump connected on the conveying pipeline 3 is started automatically at the same time, and under the control of the monitoring module 6 in the small gas monitoring station 5, the content value of harmful gases such as VOC, NH3, H2S and the like in the environment of the garbage station can be automatically detected through a gas detection device, the type and the content of the gases are displayed on a display, and the numerical value is converted into a signal in the small-sized gas detection station 5 and is transmitted to the control cabinet 4 for further analysis, a computer in the control cabinet 4 automatically analyzes the signal to form an instruction for controlling the start and stop and the rotating speed of the delivery pump 7, and then the flow velocity of the probiotic solution in the conveying pipeline 3 is controlled, meanwhile, the running signal of the conveying pump 7 is fed back to the small-sized gas detection station 5, the type and content value of harmful gas are continuously detected through the gas monitoring module 6, and continuous work among the control cabinet 4, the small-sized gas detection station 5 and the conveying pump is realized.
4) The atomization mode and the spraying angle of the atomization device 8 are adjusted according to different working environments and actual conditions. The air supply device 9 is instantaneously started under the control of the air supply device adapter 10 after the atomization device 8 is started, air flow from the air supply device 9 is guided to enter the atomization device, meanwhile, the motor 11 controls the rotary liquid atomizer device 12 to start running, the liquid is converted into liquid drops with sub-millimeter size to be sprayed outwards, and an atomization angle regulator 13 which is arranged at the end part of the atomization device and used for ensuring the adjustability of the atomization direction and the atomization angle can be manually or automatically adjusted, so that the atomization liquid drops guide the atomizer upwards or downwards relative to the direction of the air flow to accurately spray probiotics to a target position.
Different garbage recycling station operational environment, workspace, the harmful gas and the harmful gas content of production are different, satisfy different places and operational requirement on the at utmost through atomizing mode, atomizing speed, the spraying angle etc. of adjustment atomizing device 8, pursue highest economic benefits.
Further, in particular, the method for the biological treatment of leachate and malodor of domestic garbage according to a preferred embodiment of the present invention specifically includes the following three processes in step 1):
the first step is as follows: screening and preparing a composite probiotic strain capable of meeting the treatment requirement of the landfill leachate;
the living and breeding microorganisms in the refuse landfill can degrade organic pollutants in the percolate. However, the degradation speed is not the same in the whole degradation stage, and the decomposition of harmful substances in the landfill leachate by utilizing soil dominant microorganisms is started to become one of the main methods for treating the landfill leachate.
And (3) analyzing and researching the microbial diversity in the soil affected by the landfill leachate from different regions by adopting a MiSeq high-throughput sequencing technology, and screening out dominant bacteria for treating the landfill leachate.
And obtaining the related landfill leachate dominant bacteria through the steps of sampling the landfill leachate, processing a sample, enrichment culture, separation culture, purification, performance determination, strain identification and the like.
Preferably, the landfill leachate dominant bacteria mainly comprise lactic acid bacteria, yeast, bacillus subtilis and other dozens of bacteria, namely composite probiotics, and the composite probiotics are rapidly propagated through large-tank liquid fermentation;
preferably, the production process flow of the compound probiotic preparation is divided into three steps (see fig. 2):
firstly, three-stage strain propagation is carried out; secondly, a comprehensive liquid culture medium for the communicated large tank is developed, and multi-strain compound fermentation is carried out within a proper temperature range (see figure 3), the fermentation method not only saves energy and labor, but also reduces the links of product pollution, strains are uniformly distributed in the fermentation and propagation processes, and the quality of a terminal product is good; and thirdly, performing product split charging in a purification workshop.
The second step is that: the prepared composite probiotics is activated to meet the requirement of landfill leachate treatment under natural conditions.
Preferably, the prepared composite probiotics are efficiently screened and properly activated to enhance the biodegradation activity; and (3) detecting the treatment effect of the bacterial liquid in different adding modes (direct adding, adding after sterilization and no adding), screening the adding mode with the best effect, and further determining the optimal proportioning condition.
Furthermore, the leachate is formed by various metabolites and water generated due to anaerobic fermentation, organic matter decomposition, groundwater immersion and the like in the process of stacking and landfill treatment of the garbage; the rather complex composition thereof makes the treatment of percolate still a very delicate problem;
preferably, the composite activated probiotics prepared in the first step are optimized according to different reaction time, different aeration time, different inoculation amount and different pH value, and finally meet the requirement of landfill leachate treatment under natural conditions.
The third step: the screened compound microbial inoculum is combined with a traditional biochemical method to carry out advanced treatment on the leachate, determine the optimal proportioning condition and be used for treating the landfill leachate so as to meet the treatment requirements of indexes such as carbon element, nitrogen element, phosphorus element, odor and the like.
The above embodiments are merely illustrative and not restrictive of the technical solutions of the present invention. Any modification or partial replacement without departing from the spirit of the present invention should be covered in the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a device that is used for domestic waste filtration liquid and foul smell biological treatment which characterized in that: the probiotic storage tank comprises a probiotic storage tank (1), a tank valve (2), a control cabinet (4), a small-sized gas monitoring device (5), a gas detection module (6), a delivery pump (7) and an atomization device (8) which are sequentially connected through a delivery pipeline (3) and a delivery pipeline.
2. The apparatus of claim 1, wherein the apparatus comprises:
a steel pipe with threads at one end is welded on the end face of the probiotic storage tank (1) and is connected with a tank valve (2) by utilizing friction force between the threads, the tank valve (2) is in a threaded type at two ends, so that the tank valve is conveniently connected with a probiotic conveying pipeline (3), the input end and the output end of a conveying pump (7) are both provided with threads, the input end is connected with the tank valve (2) by the conveying pipeline (3), and the output end is connected with the conveying pipeline (3) connected with an atomizing device (8);
the control cabinet (4) is connected with the small gas monitoring device (5) through a data line and a power line, the gas detection module (6) is connected with a computer of the small gas monitoring device (5) to generate a numerical value signal of gas content, the control cabinet (4) is connected with the delivery pump (7) through a line to control the starting and rotating speed of the delivery pump (7), and the delivery pipelines (3) provided with the atomization device (8) are connected in series with each other through elbows with threads and tee joints;
the atomization device (8) is fixed in the middle of the tee joint through a locking device, and finally a complete closed loop is formed.
3. The apparatus of claim 2, wherein the apparatus comprises:
the atomizing device (8) comprises an air supply device (9), an air supply device adapter (10), a motor (11), a rotary atomizer (12) and an atomizing angle adjuster (13).
4. The apparatus of claim 3, wherein the apparatus comprises:
air supply unit (9) are installed in the atomizer shell through the hooker, air supply unit adapter (10) utilize the bolt closely to fix in air supply unit (9) upper end, motor (11) are installed on the telescopic support of atomizer (8) inside, and with the close protection of waterproof cover, prevent that solution or humid air from influencing the normal work of motor (11), motor (11) lean on waterproof connection of electric lines external power source, rotatory atomizer (12) is connected to the axle head of motor (11), and provide rotatory power for atomizer (8) and atomize and spray, atomizing angle regulator (13) are installed in atomizer (8) shell through the mode of ball pivot connection.
5. A method for biologically treating domestic garbage percolate and stink is characterized by comprising the following steps:
1) filling the cultured probiotics into a probiotic storage tank with constant temperature and moderate pH value according to a certain proportion (1) to ensure the maximum activity of the probiotics;
2) opening a valve (2) connected with the tank body; the valve (2) is made of alloy materials, so that probiotics can smoothly flow out of the probiotic storage tank (1) and enter the conveying pipeline (3), and the flow is controlled;
3) starting a control cabinet (4) and a small gas monitoring station (5); switch board (4) and small-size gaseous detection station (5) interconnection, connect the simultaneous self-starting of delivery pump on pipeline (3) when both start, and receive its control, monitoring module (6) in small-size gaseous monitoring station (5) can be through VOC, NH in the gaseous detection device automated inspection rubbish station environment3、H2S, the content values of harmful gases are displayed on a display, and the quantity values are converted into signals in a small gas detection station (5) and transmitted to a control cabinet (4) for further analysis;
a computer in the control cabinet (4) automatically analyzes and forms an instruction to control the start and stop and the rotating speed of the delivery pump (7), so as to control the flowing speed of the probiotic solution in the delivery pipeline (3), meanwhile, the running signal of the delivery pump (7) is fed back to the small gas detection station (5), the type and the content value of harmful gas are continuously detected by the gas monitoring module (6), and the continuous work among the control cabinet (4), the small gas detection station (5) and the delivery pump is realized;
4) adjusting the atomization mode and the spraying angle of the atomization device (8) according to different working environments and actual conditions;
after the atomizing device (8) is started, the air supply device (9) is started instantly under the control of the air supply device adapter (10) to guide air flow from the air supply device (9) to enter the atomizing device, meanwhile, the motor (11) controls the rotary liquid atomizer device (12) to start running for converting liquid into liquid drops with sub-millimeter size to be sprayed outwards, and an atomizing angle regulator (13) which is arranged at the end part of the atomizing device and is used for ensuring the adjustability of an atomizing direction and an atomizing angle can be manually or automatically adjusted, so that the atomizing liquid drops guide the atomizer upwards or downwards relative to the direction of the air flow to accurately spray probiotics to a target position.
6. The method for the biological treatment of leachate of domestic garbage and malodor according to claim 5, wherein in step 1), the method specifically comprises the following three processes:
(1) screening, culturing and preparing the composite probiotic group;
(2) optimizing the condition of treating the landfill leachate by the compound microbial flora; analyzing the influence of the composite probiotic group on the treatment effect of the landfill leachate under different reaction time, different aeration time, different inoculation amount and different pH values;
(3) researching the effect of the composite probiotic group on the landfill leachate treatment; namely, the landfill leachate is treated by utilizing a compound probiotic liquid preparation;
and analyzing the change of the general characteristics of the leachate in the degradation process, and determining various main influence indexes to analyze the treatment effect of the composite probiotic liquid on the landfill leachate and optimize the optimal parameters for treating the landfill leachate.
7. The method of claim 6, wherein the leachate and malodor is treated by the biological treatment of the domestic waste,
in the process (2), the prepared composite probiotics are subjected to activation treatment, the detection bacteria liquid is added in different adding modes, namely directly added and sterilized, and the adding mode with the best effect is screened out without adding treatment effect, and the optimal proportioning condition is further determined so as to meet the requirement of landfill leachate treatment under natural conditions;
in the process (3), the screened compound microbial inoculum is combined with a traditional biochemical method to carry out advanced treatment on the leachate, determine the optimal proportioning condition, and the optimal proportioning condition is used for treating the landfill leachate to ensure that the landfill leachate meets the treatment requirements of indexes such as carbon element, nitrogen element, phosphorus element, odor and the like, wherein the main influence indexes are one or more of SS, COD, BOD5, NH3-N and odor.
8. The method of claim 6, wherein the biological treatment comprises the steps of:
in the process (1), the method specifically comprises the following steps:
1) carrying out three-stage strain propagation;
2) the comprehensive liquid culture medium for the communicated large tank is developed, and multi-strain compound fermentation is carried out within a proper temperature range;
3) and (5) performing product split charging in a purification workshop.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115120766A (en) * | 2022-07-01 | 2022-09-30 | 深圳雾曼科技有限公司 | Probiotic compound atomization method applied to space disinfection and environment purification |
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