CN115108644A

CN115108644A - Online nutrient element adding method, device, equipment and storage medium

Info

Publication number: CN115108644A
Application number: CN202210794466.8A
Authority: CN
Inventors: 张华�; 王昭峰; 王保玉; 雒志伟
Original assignee: Mbp Environmental Engineering Co ltd
Current assignee: Mbp Environmental Engineering Co ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2022-09-27

Abstract

The embodiment of the application provides an online nutrient element adding method, device, equipment and storage medium, wherein the method comprises the following steps: monitoring the water inlet concentration of elements to be added in the biochemical tank; when the concentration of inlet water is lower than the concentration threshold of an element to be added, acquiring water quality data in the biochemical tank in a preset period; calculating the adding concentration of the elements to be added according to the concentration threshold and the water inlet concentration; and calculating the medicament adding amount of the elements to be added according to the information of the added medicament, the added concentration and the water quality data, so as to realize the adding of the elements to be added. The problem that the accuracy of controlling the dosage of the medicament is poor in a measure of regularly discharging the medicament containing nutrient elements based on manual setting can be solved, the medicament dosage required by a system can be calculated and predicted in a self-adaptive adjustment mode when the water quality or the index state changes, the dosage can be accurately and timely added, the effect of improving the accuracy of controlling the dosage of the medicament to be added is achieved, and energy consumption and operation cost are saved.

Description

Online nutrient element adding method, device, equipment and storage medium

Technical Field

The embodiment of the application relates to the technical field of sewage treatment, in particular to an online nutrient element adding method, device, equipment and storage medium.

Background

The nutrient elements such as nitrogen, phosphorus and the like are important factors for maintaining the growth and the propagation of microorganisms. If the requirement of the microorganism on nutrient elements cannot be met, the microorganism cannot grow and reproduce normally, so that the wastewater purification function of the activated sludge disappears along with the end of the life of the microorganism. Therefore, for industrial wastewater with single component and relatively deficient nitrogen and phosphorus nutrient elements, the timely and proper addition of the nitrogen and phosphorus nutrient elements is particularly important.

In the process of implementing the invention, the inventor finds that the accuracy of controlling the dosage of the medicament to be added is poor in the current measure of regularly discharging the medicament containing the nutrient elements based on manual setting.

Disclosure of Invention

The embodiment of the application provides an online nutrient element adding method, device, equipment and storage medium, and can solve the problem of poor accuracy in controlling the adding of the dosage of a medicament in the current measure of regularly discharging the medicament containing nutrient elements based on manual setting.

In a first aspect of the present application, there is provided an on-line nutrient adding method, comprising:

monitoring the influent concentration of elements to be added in a biochemical pool, wherein the elements to be added comprise phosphorus elements, nitrogen elements and/or carbon elements;

when the water inlet concentration is lower than the concentration threshold of the element to be added, acquiring water quality data in the biochemical tank in a preset period;

calculating the adding concentration of the elements to be added according to the concentration threshold and the water inlet concentration;

and calculating the medicament adding amount of the element to be added according to the medicament adding information, the adding concentration and the water quality data, so as to realize the adding of the element to be added.

By adopting the technical scheme, the inlet water concentration of the elements to be added in the biochemical tank is monitored; when the concentration of inlet water is lower than the concentration threshold of an element to be added, acquiring water quality data in the biochemical tank in a preset period; then calculating the adding concentration of the element to be added according to the concentration threshold and the water inlet concentration; and then according to the information of the added medicament, the added concentration and the water quality data, calculating the medicament adding amount of the elements to be added, realizing the adding of the elements to be added, solving the problem of poor accuracy of controlling the medicament adding amount in the measure of regularly discharging the medicament containing nutrient elements based on manual setting, adaptively adjusting when the water quality or index state changes, calculating and predicting the medicament amount required by the system, accurately adding in time, achieving the effect of improving the accuracy of controlling the medicament adding amount, and saving energy consumption and operation cost. In a possible implementation manner, the information of the added medicament includes the medicament type, the dry matter content and/or the dissolved concentration of the added medicament;

according to throwing with medicament information, throw with concentration with quality of water data, calculate the volume of throwing of the element of waiting to throw, include: calculating the total amount of biochemical oxygen demand according to the water quality data;

calculating the adding amount of dry powder of elements to be added according to the total biochemical oxygen demand, the adding concentration, the medicament type and/or the dry matter content;

and calculating the dosage of the medicament according to the dosage of the dry powder and the dissolution concentration.

In one possible implementation, the water quality data includes influent water flow, biochemical oxygen demand, chemical oxygen demand, and/or activated sludge concentration;

according to the water quality data, calculating the total amount of biochemical oxygen demand, comprising the following steps:

calculating the total amount of the biochemical oxygen demand according to the inflow and the biochemical oxygen demand; and/or

Calculating the total amount of biochemical oxygen demand according to the inflow and the chemical oxygen demand; and/or

And calculating the total amount of the biochemical oxygen demand according to the inflow and the concentration of the activated sludge.

In a second aspect of the present application, there is provided an on-line nutrient feeding device, comprising:

the monitoring module is used for monitoring the water inlet concentration of elements to be added in the biochemical tank, wherein the elements to be added comprise phosphorus elements, nitrogen elements and/or carbon elements;

the acquisition module is used for acquiring water quality data in the biochemical tank in a preset period when the inlet water concentration is lower than the concentration threshold of the element to be added;

the first calculation module is used for calculating the adding concentration of the element to be added according to the concentration threshold and the water inlet concentration;

and the second calculation module is used for calculating the medicament adding amount of the element to be added according to the medicament adding information, the adding concentration and the water quality data, so that the element to be added is added.

In a possible implementation manner, the second calculation module is specifically configured to:

calculating the total amount of biochemical oxygen demand according to the water quality data;

In a possible implementation manner, the second computing module is further specifically configured to:

In a third aspect of the present application, there is provided an on-line nutrient addition system, comprising: a monitoring subsystem and a control subsystem;

the monitoring subsystem is used for monitoring information of a biochemical oxygen demand monitoring device, a chemical oxygen demand monitoring device, a sludge concentration monitoring device and/or a water quality analysis device;

and the control subsystem is used for controlling the nutrient element adding device to add the medicament according to the monitoring information.

In one possible implementation manner, the nutrient element adding device comprises a medicine adding pump, a flow meter, a liquid level meter, a medicine storage tank and a medicine adding tank; the control subsystem is specifically configured to:

and controlling the dosing pump, the flowmeter, the liquid level meter, the medicine storage tank and/or the dosing tank to dose medicines according to the monitoring information.

In a fourth aspect of the present application, an electronic device is provided. The electronic device includes: a memory having a computer program stored thereon and a processor implementing the method as described above when executing the computer program.

In a fifth aspect of the application, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method.

It should be understood that what is described in this summary section is not intended to limit key or critical features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the present application will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of various embodiments of the present application will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:

FIG. 1 shows a block diagram of an on-line nutrient dosing system in an embodiment of the present application;

FIG. 2 shows a flow chart of an on-line nutrient addition method in an embodiment of the present application;

FIG. 3 shows a structure diagram of an on-line nutrient adding device in the embodiment of the application;

fig. 4 shows a schematic structural diagram of an electronic device suitable for implementing embodiments of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference herein to "a plurality" means greater than or equal to two. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.

The online nutrient element adding method provided by the embodiment of the application can be applied to the technical field of sewage treatment.

In the field of sewage treatment, nitrogen and phosphorus are the main components of activated sludge and are also important components of microorganisms. Thus, the basis for understanding the nutritional needs of microorganisms is the need to understand the chemical composition of the cells. Chemical analysis of the cells showed that the microbial cells contained a large amount of moisture (about 80%), the remainder being dry matter (about 20%), which in turn consisted of organic matter (about 90%) and inorganic matter (about 10%). Carbon accounts for the first (about 53.1%) and nitrogen for the third (about 12.4%) in organic matter; in inorganic substances, phosphorus is the first position (50%), and the rest is sulfur, sodium and the like. It follows that nitrogen and phosphorus are essential for microorganisms.

Meanwhile, most of the wastewater has numerous and complicated components and can generally provide various nutrient components required by microorganisms. However, for industrial sewage with a single component, the relative contents of nitrogen and phosphorus in the wastewater are very small. According to the law of minimum factors, it can be seen from "the growth of microorganisms is limited by nutrients with the lowest relative content, not the lowest absolute content", and when industrial wastewater is treated by biological methods, nitrogen and phosphorus are liable to become limiting factors. Therefore, when the activated sludge method is used for treating the industrial sewage with single component, the addition of nitrogen and phosphorus is necessary.

In the process of sewage treatment by an activated sludge method, the influence of insufficient addition of nitrogen and phosphorus on sewage treatment is mainly shown in the following aspects:

one is as follows: the flocculation property of the activated sludge is poor. When the activated sludge decomposes organic matters, nitrogen and phosphorus nutrient elements are required to be added in a matching ratio, and when the nitrogen and the phosphorus are insufficient, sufficient microorganisms cannot be generated to decompose the organic matters. In the state of lacking of nutrient, the activated sludge can not obtain enough coordination of nitrogen and phosphorus in the synthesis process, and the flocculation property is worse immediately.

The second step is as follows: the activated sludge has poor settleability. Because the flocculation property of the activated sludge is poor, excessive and fine activated sludge flocs cannot play a good role in sedimentation. Filamentous bacteria expansion is an expression of insufficient addition of nitrogen and phosphorus nutrient elements, and similarly, because enough microorganisms cannot be synthesized to deal with inflow organic matters with relatively high concentration, the activated sludge is in a high-load state, and the phenomenon that the settleability of the activated sludge is poor in a state with a high sludge load is inevitable. The activated sludge will disintegrate or flocculate poorly, resulting in liquid level scum and foaming.

Thirdly, the treatment efficiency of the activated sludge is reduced. The reduction in treatment efficiency is also caused by the deficiency of nutrients at the time of synthesis of the bacterial bodies, and is not synthesized efficiently and in sufficient quantities. Meanwhile, loosening of the structure of the activated sludge and loss due to poor settleability are another cause of poor treatment efficiency of the activated sludge.

And fourthly, the effluent water discharged from the secondary sedimentation tank is brownish yellow. The effluent of the secondary sedimentation tank presents a brown-yellow color for a plurality of reasons, wherein the active sludge is disintegrated due to the synthesis and metabolism failure of the active sludge caused by the lack of sufficient supplement of nitrogen and phosphorus nutrient elements, and the abnormality of the effluent of the secondary sedimentation tank is found when the disintegrated active sludge is dissolved in the water body.

Fifthly, the concentration of the activated sludge is difficult to increase. In the earlier stage of sewage treatment by an activated sludge process, during the culture and domestication stages of the activated sludge, if the addition of nitrogen and phosphorus nutrient elements is insufficient, the increase of the concentration of the activated sludge is seriously influenced. The expression is that the concentration of the activated sludge is low, and the membrane formation is unsuccessful after a long time.

Based on the above, in the bacteria culture stage of the activated sludge, the adding requirements of nutrient elements (elements such as nitrogen and phosphorus) are the same as those of normal bacteria culture and need to be strictly mastered, but the adding amount of the nutrient elements is slightly higher than that of the nutrient elements added in normal operation, and is basically higher than about 15% of the normal value, so that the peripheral conditions necessary for the successful start of the rapid bacteria culture of the activated sludge are provided, and meanwhile, the concentration of the activated sludge rapidly proliferating in the bacteria culture process of the activated sludge is also provided with necessary guarantee.

However, in the current methods for adding nutrient elements, a mode of manually setting and discharging the nutrient elements at fixed time is mostly adopted. The method has a serious problem for the sewage treatment process by the activated sludge method which has strict requirements on adding nutrient elements. Therefore, in the current measure of regularly discharging the medicament containing the nutrient elements based on manual setting, the problem of poor accuracy of controlling the dosage of the medicament to be added exists. In order to solve the technical problem, the embodiment of the application provides an on-line nutrient adding system.

For the sake of understanding, terms of art referred to in the embodiments of the present application will be described.

Biochemical Oxygen Demand (BOD) is a comprehensive index of the content of aerobic pollutants such as organic matters in water, and indicates the total amount of dissolved Oxygen in water consumed by the oxidation decomposition of the organic matters in water due to the Biochemical action of microorganisms to make the organic matters become inorganic or gasified.

Five-day biochemical oxygen demand (i.e., BOD5) is an important indicator of the degree of contamination of water by organic matter indirectly from the amount of dissolved oxygen consumed by microbial metabolism, and is defined as the amount of free oxygen consumed by aerobic microorganisms to oxidatively decompose organic matter in a unit volume of water on day 5, expressed in milligrams per liter (mg/L) of oxygen. BOD5 is used primarily to monitor the pollution status of organic matter in a body of water. Generally, organic matters can be decomposed by microorganisms, but the microorganisms consume oxygen when decomposing organic compounds in water, and if dissolved oxygen in water is not enough to supply the microorganisms, the water body is in a polluted state.

Specifically, the degradation of the organic matters by the microorganisms is related to the temperature, and the optimal temperature is generally 15-30 ℃, so that the 20 ℃ is generally used as the standard temperature for determination when the biochemical oxygen demand is determined. The oxidative decomposition process in the first stage (99% of the completion process) is generally completed within 20 days of the organic matter under the measured conditions of BOD (oxygen abundance, no agitation) at 20 ℃. That is, the biochemical oxygen demand in the first stage is measured, and it takes 20 days, which is difficult to do in actual work. For this purpose, a standard time is defined, generally 5 days as the standard time for measuring BOD, and hence the standard time is called five-day biochemical oxygen demand and is expressed as BOD 5.

Chemical Oxygen Demand (COD) is a Chemical method for measuring the amount of reducing substances to be oxidized in a water sample. CODcr is the chemical oxygen consumption, i.e., the dichromate index, measured using potassium dichromate (K2Cr2O7) as an oxidizing agent.

It is known that the biochemical treatment of sewage is to use the pollutant contained in the sewage as a nutrient source, and to utilize the metabolism of microorganisms to degrade the pollutant and purify the sewage. Therefore, the analysis of the sewage components and the judgment of whether the sewage can adopt the biochemical treatment are the prerequisites for designing the sewage biochemical treatment project.

The biochemical evaluation reference data of the sewage in the embodiment of the application are shown in table 1, see table 1, BOD5 and CODcr are two water quality indexes commonly used in the biochemical treatment process of the sewage, and the evaluation of the biodegradability of the sewage by using BOD5/CODcr value is the simplest method widely adopted. Different water quality ratios are different, the biochemical property of municipal sewage is better, and industrial sewage is difficult to be biochemical. BOD5 values can be scaled from CODcr.

Table 1: reference data for biochemical evaluation of sewage

BOD5/CODcr	>0.45	0.3～0.45	0.2～0.3	<0.2
					Biodegradability	Better biochemistry	Can be used for biochemical treatment	Is difficult to be biochemically treated	Unsuitable for biochemical treatment

FIG. 1 shows a block diagram of an on-line nutrient dosing system in an embodiment of the present application. Referring to fig. 1, the on-line nutrient adding system in this embodiment includes: a monitoring subsystem 101 and a control subsystem 102. The monitoring subsystem 101 is used for monitoring information of a biochemical oxygen demand monitoring device, a chemical oxygen demand monitoring device, a sludge concentration monitoring device and/or a water quality analysis device; and the control subsystem 102 is used for controlling the nutrient element adding device to add the medicament according to the monitoring information.

In the embodiment of the present application, the monitoring information includes biochemical oxygen demand information, chemical oxygen demand, activated sludge concentration, influent concentration of phosphorus element (influent total phosphorus), influent concentration of nitrogen element (influent total nitrogen) and/or influent concentration of carbon element (influent nitrate nitrogen carbon source demand).

Optionally, the biochemical oxygen demand monitoring device is a BOD5 instrument (standard equipment) and is arranged in the biochemical pool, and the signal (biochemical oxygen demand information) is fed back to the on-line nutrient adding system. The chemical oxygen demand monitoring device is a COD instrument (standard equipment) and is arranged in the biochemical pool, and a signal (chemical oxygen demand) is fed back to the on-line nutrient element adding system and the residual sludge discharge control system. The water quality analysis device is a total phosphorus online water quality analyzer (an online TP instrument and standard equipment) and/or a total nitrogen online water quality analyzer (an online TN instrument and standard equipment) and is arranged in the biochemical pool, and signals (the inlet water concentration of phosphorus element, the inlet water concentration of nitrogen element and/or the inlet water concentration of carbon element) are fed back to the online nutrient element adding system. The control nutrient element adding device (standard equipment) comprises a phosphorus nutrient element adding device, a nitrogen nutrient element adding device and a carbon source adding device, and is arranged in a dosing room.

In some embodiments, the nutrient adding device comprises a medicine adding pump, a flow meter, a liquid level meter, a medicine storage tank and a medicine adding tank. And the control subsystem 102 is specifically used for controlling the operation point positions of the flow meter and the liquid level meter according to the monitoring information, controlling the operation of the dosing pump according to the operation point positions of the flow meter and the liquid level meter, extracting the medicament from the medicament storage tank, conveying the medicament to the dosing tank, and dosing the medicament by the dosing tank according to the operation point positions of the flow meter and the liquid level meter.

In order to solve the technical problem, the embodiment of the application also provides an on-line nutrient element adding method. In some embodiments, the online nutrient dosing method may be performed by an electronic device.

Fig. 2 shows a flow chart of an on-line nutrient addition method in the embodiment of the application. Referring to fig. 2, the online nutrient adding method in this embodiment includes:

step S201: monitoring the influent concentration of elements to be added in the biochemical tank, wherein the elements to be added comprise phosphorus, nitrogen and/or carbon.

Step S202: and when the water inlet concentration is lower than the concentration threshold of the element to be added, acquiring water quality data in the biochemical tank in a preset period.

Step S203: and calculating the adding concentration of the element to be added according to the concentration threshold and the water inlet concentration.

Step S204: and calculating the medicament adding amount of the element to be added according to the medicament adding information, the adding concentration and the water quality data, so as to realize the adding of the element to be added.

In step S201, the influent concentration of the elements to be added in the biochemical tank includes influent concentration of phosphorus (total phosphorus in influent), influent concentration of nitrogen (total nitrogen in influent), and/or influent concentration of carbon (required amount of nitrate nitrogen carbon source in influent).

It should be noted that the elements to be added may also include, but are not limited to, sodium, potassium, calcium, iron, and copper.

In step S202, the concentration threshold of the element to be added comprises a certain value of total phosphorus, total nitrogen and/or required amount of the nitrate nitrogen carbon source, and the concentration threshold of the element to be added is changed along with different water quality and is basically between 1mg/L and 10 mg/L.

In the embodiment of the application, when the concentration of the inlet water is lower than the concentration threshold of the element to be added, the concentration of the element to be added is insufficient, the adding amount of the element to be added, which needs to be added, of the online nutrient element adding system is calculated according to basic water quality data in a control mode, and the concentration of the element to be added, which needs to be supplemented in a period (preset period), is calculated according to a difference value. The preset period is set manually and is basically 4 hours.

In the examples of the present application, the water quality data includes influent water flow, biochemical oxygen demand, chemical oxygen demand, and/or activated sludge concentration. Wherein the biochemical oxygen demand of the inlet water is changed according to different values of water quality and is basically between 100mg/L and 300 mg/L; the chemical oxygen demand of the inlet water varies according to different water quality values and is basically between 300mg/L and 1000 mg/L.

In step S203, the adding concentration of the element to be added is calculated according to the difference between the concentration threshold and the inlet water concentration.

In step S204, the dosing agent information corresponds to elements to be dosed, and one element to be dosed may correspond to one dosing agent information or may correspond to a plurality of dosing agent information. For example, the information of the added medicament corresponding to the sodium element comprises sodium carbonate. And the information of the added medicament corresponding to the phosphorus element comprises monopotassium phosphate, potassium phosphate, sodium phosphate and calcium superphosphate.

In the embodiment of the application, after the concentration of the element to be added, which needs to be supplemented in the preset period, is calculated, the agent adding amount of the element to be added is calculated according to the information of the added agent and the water quality data, so that the element to be added is added.

By adopting the technical scheme, the inlet water concentration of the elements to be added in the biochemical tank is monitored; when the concentration of inlet water is lower than the concentration threshold of an element to be added, acquiring water quality data in the biochemical tank in a preset period; then calculating the adding concentration of the element to be added according to the concentration threshold and the water inlet concentration; and then according to the information of the added medicament, the added concentration and the water quality data, calculating the medicament adding amount of the elements to be added, realizing the adding of the elements to be added, solving the problem of poor accuracy of controlling the medicament adding amount in the measure of regularly discharging the medicament containing nutrient elements based on manual setting, adaptively adjusting when the water quality or index state changes, calculating and predicting the medicament amount required by the system, accurately adding in time, achieving the effect of improving the accuracy of controlling the medicament adding amount, and saving energy consumption and operation cost. In some embodiments, the dosing agent information includes a type of agent, a dry matter content, and/or a dissolution concentration of the dosing agent. Step S204 includes: step a 1-step A3.

Step A1: and calculating the total amount of the biochemical oxygen demand according to the water quality data.

Step A2: and calculating the dry powder adding amount of the elements to be added according to the total biochemical oxygen demand, the adding concentration, the medicament type and/or the dry matter content.

Step A3: and calculating the dosage of the medicament according to the dosage of the dry powder and the dissolution concentration.

In the embodiment of the application, the total biochemical oxygen demand is calculated according to the inflow and the biochemical oxygen demand in the water quality data. The total amount of the biochemical oxygen demand is basic data for calculating the adding amount of elements to be added.

In the embodiment of the application, after the concentration of the elements to be added and the total biochemical oxygen demand which need to be supplemented in a preset period are calculated, the adding amount of the elements to be added is calculated according to the type, dry matter content and/or dissolved concentration of the added agents, and the adding amount of the supplemented agents is controlled by an online nutrient element adding system, so that the elements to be added are added.

In the embodiment of the application, when the adding amount of the medicament of the phosphorus element, the nitrogen element and/or the carbon element is calculated, the biochemical oxygen demand, the ratio of the nitrogen element and the phosphorus element are fixed values which are set by the user according to the water quality. For example, the biochemical oxygen demand, the ratio between nitrogen and phosphorus may be 100:5:1, i.e. BOD5: N: P: 100:5: 1.

In some embodiments, the water quality data includes influent water flow, biochemical oxygen demand, chemical oxygen demand, and/or activated sludge concentration. Step a1 includes: step a 1-step a 3.

Step a 1: and calculating the total amount of the biochemical oxygen demand according to the inflow water flow and the biochemical oxygen demand.

Step a 2: and calculating the total amount of the biochemical oxygen demand according to the inflow and the chemical oxygen demand.

Step a 3: and calculating the total amount of the biochemical oxygen demand according to the inflow and the concentration of the activated sludge.

In the embodiment of the present application, the relationship between step a1, step a2 and step a3 is and/or.

In the embodiment of the application, the biochemical oxygen demand can be calculated according to the proportion from the chemical oxygen demand, and the biochemical oxygen demand can be calculated according to the relevant conversion relation from the activated sludge concentration.

It should be noted that the accuracy of the biochemical oxygen demand obtained by receiving the monitoring information of the biochemical oxygen demand monitoring device is higher than the accuracy of the biochemical oxygen demand obtained by receiving the monitoring information of the chemical oxygen demand monitoring device and calculating the ratio after the chemical oxygen demand is obtained, and the accuracy of the biochemical oxygen demand obtained by receiving the monitoring information of the sludge concentration monitoring device and calculating the sludge concentration according to the related conversion relationship is higher than the accuracy of the biochemical oxygen demand obtained by receiving the monitoring information of the sludge concentration monitoring device and calculating the sludge concentration. In the actual application process, the acquisition mode of the biochemical oxygen demand can be selected according to the actual situation.

In order to improve the precision, the average value of the biochemical oxygen demand obtained in the above manner can be calculated to obtain the final biochemical oxygen demand. And according to the mode, multiple times of sampling calculation are carried out, and the median is taken as the final biochemical oxygen demand.

For the convenience of understanding, the dosage of the elements to be added is calculated by taking the elements to be added as phosphorus element, nitrogen element and/or carbon element as an example.

Table 2 shows basic values for calculating the dosage of the chemical to be dosed of the elements in the examples of the present application, and referring to table 2, the total amount of the bod is calculated by the following formula:

total BOD (BOD content. times. Q.times.24)/1000

Wherein, the total BOD represents the total biochemical oxygen demand, the BOD content represents the BOD5 content, and Q represents the influent flow of the biochemical tank.

Table 2: calculating the basic value of the dosage of the medicament of the element to be added

When the total phosphorus in the inlet water of the biochemical tank is lower than the concentration threshold of the phosphorus element, the element to be added is the phosphorus element. At the moment, the total phosphorus of the inlet water, BOD5 of the inlet water, COD of the inlet water and/or the concentration of the online sludge in 4 hours (in a certain period) are monitored, the amount of phosphorus elements required by the activated sludge is calculated, and the adding amount of the phosphorus elements in the period is automatically controlled.

In the next period (within 4 hours), if the total phosphorus in the influent water of the biochemical pool is lower than the concentration threshold of the phosphorus element, calculating the amount of the phosphorus element required by the activated sludge according to the mode, and automatically controlling the adding amount of the phosphorus element in the period.

The specific process for calculating the dosage of the phosphorus element comprises the following steps:

the ratio of the biochemical oxygen demand to the nitrogen element to the phosphorus element is set to be 100:5:1, namely BOD5: N: P is 100:5: 1.

And calculating the amount of the phosphorus element required by the activated sludge according to the set biochemical oxygen demand and the ratio of the nitrogen element to the phosphorus element.

The type of the selected medicament to be added is phosphoric acid (H) ₃ PO ₄ ) (ii) a The dry matter content was 32%; the dissolved concentration was 75%.

The adding amount of the phosphoric acid dry powder per hour is (((((BOD total amount x adding concentration)/dry matter content)/24)/Qx 1000)/dissolving concentration)/24

The adding amount of the dry phosphoric acid powder per hour represents the adding amount of the dry phosphoric acid powder added per hour, the BOD total amount represents the total biochemical oxygen demand amount, the adding concentration represents the adding concentration of an element (phosphorus element) to be added, the dry matter content represents the dry matter content of a medicament added with phosphoric acid, Q represents the water inlet flow rate of a biochemical pond, and the dissolving concentration represents the medicament concentration of the added medicament after phosphoric acid is dissolved.

In the embodiment of the present application, the calculation process of the dosage of the nitrogen element is the same as that of the dosage of the phosphorus element, and is not described herein again.

It should be noted that, when calculating the dosage of the carbon element or other elements, the corresponding parameters need to be adjusted according to the specific reaction process of the biochemical pool.

For example, when calculating the dosage of the carbon element, the basic data needs the total nitrogen content and the nitrate nitrogen content of the inlet water besides the inlet water flow of the biochemical pond and the biochemical oxygen demand of five days.

The specific process for calculating the medicament adding amount of the carbon element comprises the following steps:

acquiring a full-process nitrification and denitrification ratio and a short-process nitrification and denitrification ratio, reducing nitrate nitrogen into nitrogen organic-requiring substances in the full process and reducing nitrate nitrogen into nitrogen organic-requiring substances in the short process;

reducing the nitrate nitrogen carbon source demand amount of the inlet water to be equal to the nitrate nitrogen content of the inlet water multiplied by the organic matter required by the nitrogen in the whole process;

the whole-process carbon source demand is equal to the total nitrogen content minus the influent nitrate nitrogen content, multiplied by the whole-process nitrification and denitrification ratio, and multiplied by the whole process to reduce the nitrate nitrogen into nitrogen organic matter;

the short-range carbon source demand is equal to the total nitrogen content minus the nitrate nitrogen content of the feed water, multiplied by the short-range nitrification-denitrification ratio, and multiplied by the short-range reduction of the nitrate nitrogen into nitrogen organic matters;

the amount of the added carbon source is equal to the sum of the carbon source demand for reducing the nitrate nitrogen in the water and the whole carbon source demand, and the sum of the short-distance carbon source demand and the total carbon source demand is less than one hundred.

Based on the steps, if market sodium acetate is added as an added medicament, the per-hour adding amount of the carbon source is equal to the amount of the added carbon source divided by the BOD content of sodium acetate, and then divided by the content of the market solid sodium acetate multiplied by an adding coefficient;

table 3 shows a dosing calculation table for dosing nutrient elements in the embodiment of the present application, referring to table 3, based on the above process, the universal meter can detect the data of the influent water flow, influent water BOD5, influent water TP, and the like of the biochemical tank, calculate the dosing amount of the element to be dosed in a certain period, and automatically control the dosing by the nutrient element dosing system.

Meanwhile, the online nutrient element adding method based on the online nutrient element adding system is different from the current measure of manually setting the timed discharge, can realize real-time monitoring and calculation of the adding amount of the nutrient elements in a certain period, achieves accurate control of the added elements, and can also save the energy consumption of adding medicaments.

Table 3: adding calculation table for adding nutrient elements

It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are exemplary embodiments and that the acts and modules referred to are not necessarily required in this application.

The above is a description of method embodiments, and the embodiments of the present application are further described below by way of apparatus embodiments.

Fig. 3 shows a structure diagram of an on-line nutrient adding device according to an embodiment of the present application. Referring to fig. 3, the on-line nutrient adding device includes a monitoring module 301, an obtaining module 302, a first calculating module 303 and a second calculating module 304.

The monitoring module 301 is configured to monitor the influent concentration of elements to be added in the biochemical tank, where the elements to be added include phosphorus, nitrogen and/or carbon.

An obtaining module 302, configured to obtain water quality data in the biochemical tank within a preset period when the influent water concentration is lower than a concentration threshold of an element to be added.

And the first calculating module 303 is configured to calculate the adding concentration of the element to be added according to the concentration threshold and the water inlet concentration.

And the second calculating module 304 is configured to calculate a medicament adding amount of an element to be added according to the information of the added medicament, the added concentration, and the water quality data, so as to realize the adding of the element to be added.

In some embodiments, the second calculation module 304 is specifically configured to:

calculating the dry powder adding amount of elements to be added according to the total biochemical oxygen demand, the adding concentration, the medicament type and/or the dry matter content;

In some embodiments, the second calculation module 304 is further specifically configured to:

In the embodiment of the present application, in addition to the above-mentioned apparatus, the apparatus further includes: sewage treatment total nitrogen online control device that reaches standard, online mud backward flow controlling means, online nitrify liquid backward flow controlling means and online excess sludge discharge controlling means, wherein, the sewage total nitrogen online control device that reaches standard includes:

the data acquisition module is used for acquiring ammoniacal nitrogen concentration data and nitrate nitrogen concentration data in the biochemical pool in real time;

the setting module is used for receiving an upper limit concentration threshold value and a lower limit concentration threshold value of dissolved oxygen of the user terminal and standard ranges of ammoniacal nitrogen concentration and nitrate nitrogen concentration, and judging whether the ammoniacal nitrogen concentration and the nitrate nitrogen concentration exceed the standard or not in real time based on the standard ranges of the ammoniacal nitrogen concentration and the nitrate nitrogen concentration;

the up-regulation module is used for up-regulating the upper limit concentration threshold value and the lower limit concentration threshold value by a unit increment amount when the ammonia nitrogen concentration data exceeds the standard, and setting the maintaining time length;

and the carbon feeding control module is used for sending a carbon source feeding instruction to the carbon source terminal if the nitrate nitrogen concentration data in the maintaining time exceeds the standard, and the carbon source terminal is used for feeding a quantitative carbon source into the biochemical pool when receiving the carbon source feeding instruction.

Specifically, by adopting the technical scheme, the ammonia nitrogen concentration and the nitrate nitrogen concentration in the sewage are obtained in real time, the upper limit concentration threshold value and the lower limit concentration threshold value as well as the standard range of the ammonia nitrogen concentration and the nitrate nitrogen concentration are preset according to the ammonia nitrogen concentration and the nitrate nitrogen concentration, when the ammonia nitrogen concentration exceeds the standard, the system can automatically adjust the upper limit threshold value and the lower limit threshold value of the dissolved oxygen, so that the content of the dissolved oxygen in the water is increased, the adjusted numerical value is fixed, the maintaining time is set, the adding of the dissolved oxygen is more stable, the nitrate nitrogen is not easy to suddenly increase due to excessive adding, and the change of the ammonia nitrogen concentration and the nitrate nitrogen concentration in the sewage can be observed in the maintaining time; if the concentration of the nitrate nitrogen exceeds the standard in the maintaining time, namely the contents of the ammonia nitrogen and the nitrate nitrogen are unbalanced, the carbon source terminal throws carbon into the biochemical pond by sending a throwing instruction to the carbon source terminal to promote the denitrification reaction of the nitrate nitrogen and accelerate the denitrification process of the nitrate nitrogen so as to reduce the concentration of the nitrate nitrogen, and at the moment, the concentrations of the ammonia nitrogen and the nitrate nitrogen in the sewage can be maintained in the standard range to realize the balance of the ammonia nitrogen and the nitrate nitrogen in the sewage; the system can automatically adjust the upper and lower limit threshold of dissolved oxygen according to the ammonia nitrogen concentration and automatically control carbon feeding operation according to the nitrate nitrogen concentration, thereby reducing the complicated steps of manual debugging, facilitating the control of the ammonia nitrogen and nitrate nitrogen contents in the sewage treatment within the standard range by workers and ensuring more convenient control of the total nitrogen content in the sewage treatment.

On-line sludge backflow control device includes:

the data acquisition module is used for acquiring water quality feedback data of a water inlet end, first sludge concentration data of the reaction area and second sludge concentration data of the sedimentation tank in real time;

the data input module is used for inputting the water quality feedback data, the first sludge concentration data and the second sludge concentration data which are acquired in real time into the standard judgment model, and the standard judgment model is preset with a water quality standard exceeding threshold;

the data comparison module is used for judging the numerical values of the water quality feedback data and the water quality standard exceeding threshold value and judging the numerical values of the first sludge concentration data and the second sludge concentration data when the standard judgment model receives the water quality feedback data, the first sludge concentration data and the second sludge concentration data;

the interval up-regulation module is used for up-regulating a flow control interval of the sludge reflux quantity and setting the maintaining time when the water quality feedback data is greater than the water quality standard exceeding threshold or the second sludge concentration data is greater than the first sludge concentration data;

and the interval down-regulation module is used for down-regulating the flow control interval and setting the maintaining time length when the second sludge concentration data is less than or equal to the first sludge concentration data and the water quality feedback data is less than the water quality standard exceeding threshold value within the maintaining time length.

Specifically, through adopting above-mentioned technical scheme, acquire the quality of water feedback data of the end of intaking in real time, reaction zone sludge concentration and sedimentation tank concentration, whether the quality of water of the end of intaking is worsened in order to judge through the quality of water feedback data of the end of comparing the end of intaking more than quality of water exceeds standard threshold, whether the sludge concentration of the judgement sedimentation tank of comparing the sludge concentration of reaction zone and sedimentation tank is too big, when quality of water worsens, automatically, the flow control interval of the mud backward flow of rising, in order to increase the mud backward flow, the nitration and the denitrification reaction of reaction zone are accelerated in the increase of mud backward flow, when sedimentation tank sludge concentration is too big, rising the mud backward flow of rising has also improved the absorption of mud, the utilization ratio of the function of increase sludge sedimentation, make simultaneously the play water quality difficult receiving influence, can alleviate reaction zone water quality deterioration. When the water quality of the water inlet end reaches the standard again and the sludge concentration of the sedimentation tank is less than or equal to the sludge concentration of the reaction zone, the flow control interval can be automatically adjusted downwards, namely when the water quality accords with the standard again and the sludge concentration of the sedimentation tank and the sludge concentration of the reaction zone are balanced, the sludge reflux quantity is adjusted downwards to the initial state, therefore, when the water quality deteriorates or the sludge concentration of the sedimentation tank is too large, the sludge reflux quantity can be automatically monitored and adjusted according to the acquired data, the sludge treatment is not easily influenced, the time for artificially calculating the data is saved, the labor force for manually debugging and monitoring is saved, and the purposes of saving time and labor force in the sludge reflux quantity adjusting mode are achieved.

The online nitrifying liquid reflux control device includes:

the monitoring module is used for monitoring total nitrogen of inlet water, total nitrogen of outlet water and sludge reflux quantity of regulation and control index concentrations in the biochemical pool, wherein the regulation and control index concentrations comprise ammonia nitrogen concentration and/or nitrate concentration;

the calculating module is used for calculating a first nitrifying liquid reflux quantity of the biochemical pool according to the total influent nitrogen, the total effluent nitrogen and the sludge reflux quantity when the regulation and control index concentration exceeds a concentration threshold value, wherein the concentration threshold value comprises a concentration threshold value of the regulation and control index concentration, and the first nitrifying liquid reflux quantity comprises a nitrifying liquid reflux quantity actually required by the biochemical pool when the regulation and control index concentration exceeds the concentration threshold value;

the regulation and control module is used for regulating and controlling the regulation and control index concentration according to the first nitrifying liquid reflux amount and the concentration threshold value; the monitoring subsystem is used for monitoring the monitoring information of the dissolved oxygen concentration monitoring device, the ammonia nitrogen concentration monitoring device, the nitrate concentration monitoring device and/or the nitrifying liquid reflux monitoring device;

and the control subsystem is used for controlling the nitrification liquid reflux control device to regulate and control the regulation and control index concentration in the biochemical tank by matching with the dissolved oxygen control system according to the monitoring information.

Specifically, by adopting the above technical scheme, the control index concentration, the total nitrogen of the inlet water, the total nitrogen of the outlet water and the sludge reflux amount in the biochemical pool are monitored, when the control index concentration exceeds the concentration threshold, the first nitrifying liquid reflux amount of the biochemical pool is calculated according to the total nitrogen of the inlet water, the total nitrogen of the outlet water and the sludge reflux amount, then, the control index concentration is controlled according to the first nitrifying liquid reflux amount and the concentration threshold, the problems that in the current control method for nitrifying liquid reflux based on manual setting, the nitrifying liquid reflux amount is generally a constant value of equipment, cannot be automatically adjusted when the water quality or the index state changes, and the treatment effect is poor or the energy consumption is high due to insufficient reflux amount or excessive reflux amount, the accurate control of the total nitrogen reduction of the system cannot be realized are solved, the automatic control of the nitrifying liquid reflux amount is achieved, and the low energy consumption is reduced on the premise of good effect, improving the effect of the accuracy of total nitrogen reduction.

An on-line excess sludge discharge control apparatus comprising:

the state acquisition module is used for acquiring equipment state information of the online measurement equipment;

the state judgment module is used for judging whether the online measurement equipment is matched with a preset abnormal type or not according to the equipment state information;

the abnormality analysis module is used for generating a discharge stopping instruction when the online measuring equipment is matched with a preset abnormal type, analyzing the preset abnormal type matched with the online measuring equipment, and determining abnormal position information and abnormal reasons of the online measuring equipment, wherein the discharge stopping instruction is used for controlling the discharge equipment to stop discharging the residual sludge;

the scheme determining module is used for extracting keywords from the abnormal position information and the abnormal reason to obtain abnormal keyword information and determining an abnormal solution based on the keyword information;

and the control display module is used for controlling and displaying the abnormal solution.

Specifically, by adopting the above technical scheme, when the discharge control is performed on the excess sludge, the state acquisition module acquires the equipment state information of the online measurement equipment, then the state judgment module judges whether the online measurement equipment is matched with the preset abnormal type or not according to the equipment state information, when the online measurement equipment is matched with the preset abnormal type, the current online measurement equipment has a fault, the abnormal analysis module generates a discharge stopping instruction, controls the discharge equipment to stop discharging the excess sludge, analyzes the preset abnormal type matched with the online measurement equipment at the same time, determines the abnormal position information and the abnormal reason of the online measurement equipment, then the scheme determination module respectively performs keyword extraction on the abnormal position information and the abnormal reason to obtain the abnormal keyword information, determines the abnormal solution scheme according to the keyword information, the control display module controls and displays the abnormal solution so that maintenance personnel can maintain the online measuring equipment according to the abnormal solution, and the effect of timely troubleshooting and maintenance of the online measuring equipment is achieved.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the described module may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.

Fig. 4 shows a schematic structural diagram of an electronic device suitable for implementing embodiments of the present application. As shown in fig. 4, the electronic device 400 shown in fig. 4 includes: a processor 401 and a memory 403. Wherein the processor 401 is connected to the memory 403. Optionally, the electronic device 400 may also include a transceiver 404. It should be noted that the transceiver 404 is not limited to one in practical applications, and the structure of the electronic device 400 is not limited to the embodiment of the present application.

The Processor 401 may be a CPU (Central Processing Unit), a general purpose Processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or execute the various illustrative logical blocks, modules, and circuits described in connection with the disclosure herein. The processor 401 may also be a combination of computing functions, e.g., comprising one or more microprocessors, a combination of a DSP and a microprocessor, or the like.

Bus 402 may include a path that transfers information between the above components. The bus 402 may be a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, or the like. Bus 402 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 4, but this does not indicate only one bus or one type of bus.

The Memory 403 may be a ROM (Read Only Memory) or other type of static storage device that can store static information and instructions, a RAM (Random Access Memory) or other type of dynamic storage device that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), a magnetic Disc storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these.

The memory 403 is used for storing application program codes for executing the scheme of the application, and the execution is controlled by the processor 401. Processor 401 is configured to execute application program code stored in memory 403 to implement the aspects illustrated in the foregoing method embodiments.

Wherein, the electronic device includes but is not limited to: mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. The electronic device shown in fig. 4 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present application.

The present application provides a computer-readable storage medium, on which a computer program is stored, which, when running on a computer, enables the computer to execute the corresponding content in the foregoing method embodiments. Compared with the prior art, in the embodiment of the application, the water inlet concentration of the elements to be added in the biochemical pool is monitored; when the concentration of inlet water is lower than the concentration threshold of an element to be added, acquiring water quality data in the biochemical tank in a preset period; then calculating the adding concentration of the element to be added according to the concentration threshold and the water inlet concentration; and then according to the information of the added medicament, the added concentration and the water quality data, calculating the medicament adding amount of the elements to be added, realizing the adding of the elements to be added, solving the problem of poor accuracy of controlling the medicament adding amount in the measure of regularly discharging the medicament containing nutrient elements based on manual setting, adaptively adjusting when the water quality or index state changes, calculating and predicting the medicament amount required by the system, accurately adding in time, achieving the effect of improving the accuracy of controlling the medicament adding amount, and saving energy consumption and operation cost. It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims

1. An on-line nutrient element adding method is characterized by comprising the following steps:

2. The method according to claim 1, wherein the information of the added medicament comprises the type of the added medicament, the dry matter content and/or the dissolved concentration;

according to throwing with medicament information, throw with concentration with quality of water data, calculate the volume of throwing of the element of waiting to throw, include:

3. The method of claim 2, wherein the water quality data comprises influent water flow, biochemical oxygen demand, chemical oxygen demand, and/or activated sludge concentration;

And calculating the total amount of biochemical oxygen demand according to the inflow and the concentration of the activated sludge.

4. The utility model provides an online nutrient element dosing device which characterized in that includes:

the acquisition module is used for acquiring water quality data in the biochemical pool in a preset period when the inlet water concentration is lower than the concentration threshold of the element to be added;

5. The apparatus of claim 4, wherein the second computing module is specifically configured to:

6. The apparatus of claim 5, wherein the second computing module is further specifically configured to:

7. An on-line nutrient adding system is characterized by comprising: a monitoring subsystem and a control subsystem;

8. The system of claim 7, wherein the nutrient adding device comprises a dosing pump, a flow meter, a liquid level meter, a medicine storage tank and a dosing tank; the control subsystem is specifically configured to:

9. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program, wherein the processor, when executing the computer program, implements the method of any of claims 1-3.

10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 3.