CN106045046B - A method of activated sludge dephosphorizing efficiency is assessed based on breathing map - Google Patents

A method of activated sludge dephosphorizing efficiency is assessed based on breathing map Download PDF

Info

Publication number
CN106045046B
CN106045046B CN201610585761.7A CN201610585761A CN106045046B CN 106045046 B CN106045046 B CN 106045046B CN 201610585761 A CN201610585761 A CN 201610585761A CN 106045046 B CN106045046 B CN 106045046B
Authority
CN
China
Prior art keywords
curve
activated sludge
respiratory
point
atlas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201610585761.7A
Other languages
Chinese (zh)
Other versions
CN106045046A (en
Inventor
李志华
郭锐
俞汉青
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Science and Technology of China USTC
Xian University of Architecture and Technology
Original Assignee
University of Science and Technology of China USTC
Xian University of Architecture and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of Science and Technology of China USTC, Xian University of Architecture and Technology filed Critical University of Science and Technology of China USTC
Priority to CN201610585761.7A priority Critical patent/CN106045046B/en
Publication of CN106045046A publication Critical patent/CN106045046A/en
Application granted granted Critical
Publication of CN106045046B publication Critical patent/CN106045046B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/308—Biological phosphorus removal
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
    • G06Q10/063—Operations research, analysis or management
    • G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/22—O2
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/38—Gas flow rate
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Landscapes

  • Business, Economics & Management (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Human Resources & Organizations (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Strategic Management (AREA)
  • Entrepreneurship & Innovation (AREA)
  • Economics (AREA)
  • Educational Administration (AREA)
  • Organic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Microbiology (AREA)
  • Development Economics (AREA)
  • Game Theory and Decision Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • General Business, Economics & Management (AREA)
  • Physics & Mathematics (AREA)
  • Tourism & Hospitality (AREA)
  • Quality & Reliability (AREA)
  • Operations Research (AREA)
  • Marketing (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Activated Sludge Processes (AREA)

Abstract

The invention discloses a kind of methods based on breathing map assessment activated sludge dephosphorizing efficiency, comprising: 1) carries out breathing atlas analysis to sludge sewage, obtain breathing map DO-t curve；2) corresponding breathing map OUR-t curve is converted by breathing map DO-t curve；3) two change points B and C are obtained according to OUR variation characteristic on breathing map OUR-t curve, this two o'clock respectively corresponding points B ˊ and C ˊ is found respectively on breathing map DO-t curve simultaneously, DO-t curve with point B ˊ, C ˊ line, is divided into region I and region II respectively by DO-t curve starting point A；4) according to I area ratio of region II/region, activated sludge dephosphorizing efficiency is assessed, I area ratio of region II/region is bigger, and activated sludge dephosphorizing efficiency is higher.The present invention breathes atlas analysis according to activated sludge, effectively assesses the dephosphorization efficiency of activated sludge.

Description

Method for evaluating activated sludge dephosphorization efficiency based on respiratory map
Technical Field
The invention belongs to the field of sewage treatment, and relates to a method for evaluating the phosphorus removal efficiency of activated sludge by analyzing the respiratory map of the activated sludge.
Background
Water eutrophication causes water quality deterioration and seriously affects production and life of people, nitrogen and phosphorus are important nutrient substances of water organisms, but aquatic organisms such as algae are more sensitive to phosphorus, so that the key point is to remove phosphorus in sewage.
At present, chemical and biological methods are generally adopted to remove phosphorus from sewage. Chemical phosphorus removal is the earliest method for removing phosphorus, and the basic principle is that chemical agents (aluminum salt, calcium salt, iron salt and the like) are added to react with phosphorus in water to generate insoluble phosphate precipitate, and then the phosphorus in the water is removed through solid-liquid separation. The method is simple to operate and high in dephosphorization efficiency. But the addition of chemical agents obviously increases the treatment cost, generates a large amount of sludge and is difficult to perform subsequent treatment; biological phosphorus removal, namely phosphorus removal of activated sludge, is mainly completed by microorganisms which are collectively called as phosphorus-accumulating bacteria in the activated sludge, and the phosphorus removal mechanism is as follows: under the anaerobic condition, phosphorus accumulating bacteria in the activated sludge hydrolyze phosphorus accumulating bacteria in cells into phosphate to release the phosphate out of the cells, obtain energy from the phosphate, and synthesize easily degradable organic matters in the sewage into an energy storage substance PHB to be stored in the cells; then under aerobic condition, the PHB is oxidized and decomposed by phosphorus accumulating bacteria in the activated sludge, and the energy generated by the reaction is utilized to excessively absorb phosphate in the sewage and store the phosphate in the form of phosphorus accumulation in cells. The aerobic phosphorus uptake is usually larger than the anaerobic phosphorus release, so the purpose of phosphorus removal can be realized by discharging excess sludge. The biological phosphorus removal method has the advantages of sustainability, low operation cost, no secondary pollution and the like, so that most of the countries select the application of the method to realize the purpose of high-efficiency phosphorus removal. Therefore, how to accurately evaluate the phosphorus removal efficiency of the activated sludge is very important.
The phosphorus removal efficiency of the activated sludge is evaluated by methods such as anaerobic phosphorus release rate, anaerobic stored PHB content and the like. The invention establishes a simpler and easier activated sludge dephosphorization efficiency evaluation method through respiratory map analysis.
Disclosure of Invention
The invention aims to provide a method for evaluating the phosphorus removal efficiency of activated sludge based on a respiratory map.
As a method for evaluating the phosphorus removal efficiency of activated sludge, the test result of the activated sludge in a sewage plant shows that: the method for evaluating the phosphorus removal efficiency of the activated sludge based on the respiratory map can accurately and efficiently evaluate the phosphorus removal efficiency of the activated sludge.
The purpose of the invention is realized by the following technical scheme.
The method for evaluating the phosphorus removal efficiency of the activated sludge based on the respiratory map provided by the embodiment of the invention comprises the following steps:
1) taking activated sludge of a sewage treatment plant, washing the activated sludge for multiple times by using a buffer solution, and fully aerating to enable the activated sludge to enter an endogenous respiration state;
2) selecting aeration quantity parameter k of aeration equipmentLa, in the activated sludge entering the endogenous respiration state in the step 1), according to a selected aeration parameter kLa, controlling the addition amount S of organic matters, and adjusting aeration parameters according to the actual phosphorus removal characteristic of activated sludge to obtain a DO-t curve of a respiration map;
3) selecting saturated dissolved oxygen value C in the presence of activated sludge, and combining the aeration parameter k of the aeration equipment selected in the step 2)La, converting the DO-t curve of the respiratory atlas obtained in the step 2) into an OUR-t curve of the respiratory atlas according to a formula;
4) determining a respiratory rate OUR mutation point B and a respiratory rate OUR change termination point C on the respiratory atlas OUR-t curve obtained in the step 3), and then finding a point B 'corresponding to the respiratory rate OUR mutation point B and a point C' corresponding to the respiratory rate OUR change termination point C on the corresponding respiratory atlas DO-t curve; connecting an initial point A and a point C ' of a DO-t curve of a respiratory atlas, dividing the DO-t curve of the respiratory atlas into two areas by taking a connecting line of two points A, B ' on the DO-t curve of the respiratory atlas as a boundary line, and forming an area I by the connecting line AB ' and the DO-t curve of the respiratory atlas; a connecting line AB ', a connecting line AC' and a respiration atlas DO-t curve form an area II;
5) and evaluating the phosphorus removal efficiency of the activated sludge according to the area ratio of the area II to the area I, wherein the larger the area ratio of the area II to the area I is, the higher the phosphorus removal efficiency of the activated sludge is.
Further, in the step 1), the specific process of the activated sludge entering the endogenous respiration state is as follows:
taking activated sludge of a sewage treatment plant, adding tap water according to the volume ratio of 1:3 for dilution, stirring, precipitating, removing supernatant, fixing the volume of an activated sludge sample to 1/2 volume of activated sludge diluent, washing sludge for 3 times by using PBS buffer solution, then adding tap water to fix the volume of activated sludge mixed liquid to the original volume of the activated sludge diluent, aerating for 2 hours, and enabling the activated sludge to enter an endogenous respiration state.
Further, the DO-t curve of the respiratory map meets the following conditions:
duration t of DO drop phase1：5≤t1≤25min；
The descending amplitude △ DO of the DO descending stage is more than or equal to 0.2 and less than or equal to △ DO and less than or equal to 6.0 mg/L;
total duration t of DO-t curve3，120≤t3≤600min。
Further, in the step 2), the breathing pattern DO-t curve is obtained by the following condition control:
2a) adjusting the addition amount S of organic matters and the concentration MLSS of the activated sludge diluent, and controlling the duration t of the DO reduction stage1：5≤t1The DO reduction range is △ DO of not less than 25min and 0.2 not less than △ DO not less than 6.0 mg/L;
△ DO is the difference value of DO at the starting point A of a DO-t curve of the respiratory map and DO at the ending point D of a DO descending stage;
duration t when DO falls1If the DO is reduced within 5min or the DO reduction amplitude △ DO is less than 0.2mg/L, the adding amount of the organic matter S or the concentration MLSS of the activated sludge diluent is increased;
duration t when DO falls1When the DO is reduced for more than 25min or the DO reduction amplitude △ DO is more than 6.0mg/L, the quantity S of organic matters or the concentration MLSS of the activated sludge diluent is reduced;
continuously adjusting the addition amount S of organic matters and the concentration MLSS of the activated sludge diluent to ensure the duration t of the DO reduction stage1：5≤t1The DO reduction range is △ DO of not less than 25min and 0.2 not less than △ DO not less than 6.0 mg/L;
2b) keeping the addition amount S of the organic matters and the concentration MLSS of the activated sludge diluent obtained in the step 2a) unchanged, and adjusting the aeration quantity parameter k of the aeration equipmentLa, controlling the total duration t of the DO-t curve3：120≤t3≤600min；
Wherein, t3The time point when the slope change of the curve tends to zero;
keep satisfying the duration t of the DO descent phase1The adding amount S of organic matters and the concentration MLSS of the activated sludge diluent are not changed under the condition of DO reduction amplitude △ DO, and when the total duration t of the curve is3When the time is less than 120min, the aeration quantity parameter k of the aeration equipment is reducedLa; when curve total duration t3When the time is more than 600min, the aeration quantity parameter k of the aeration equipment is increasedLa; by continuously adjusting kLa, making the total duration t of the curve3：120≤t3≤600min；
2c) If the above step 2b) is performed by continuously adjusting kLa, aeration quantity parameter k of aeration equipmentLa total duration t of the curve can not be realized within a controllable range3：120≤t3Adjusting the addition amount S of organic substances within 600min or less, and maintaining the duration t of DO lowering stage1：5≤t1The total duration t of the curve is realized under the premise that the DO is not less than 25min and the DO reduction amplitude △ DO is not less than 0.2 and not more than △ DO and not more than 6.0mg/L3：120≤t3≤600min；
2d) The amount S of organic matter and the aeration parameter k of the aeration apparatus determined in combination in the above steps 2a), 2b) and 2c)LUnder the condition a, obtaining a DO-t curve, namely a respiration atlas DO-t curve, and simultaneously obtaining the inflection point occurrence time t of the respiration atlas DO-t curve at the rising stage2：30≤t2≤300min。
Further, the adjustment range of the adjustment of the concentration MLSS of the activated sludge diluent is 250-5000 mg/L.
Further, the organic matter is a single carbon source: sodium acetate, glucose, or as a mixed carbon source: domestic sewage.
Step 2) according to the selected aeration parameter k of the aeration equipmentLa, controlling the addition amount S of the organic matters, wherein the control method comprises the following steps:
2 a') if the organic substance is a single carbon source of sodium acetate, the corresponding relationship in value is S ═ 0.23 to 136 kLa；
2 b') if the organic substance is glucose as a sole carbon source, the numerical correspondence is S ═ 0.38 to 231 kLa；
2 c') if the organic matter is a mixed carbon source domestic sewage, the numerical correspondence is S ═ 1.25 to 750 kLa; the addition amount of S unit mg/L, kLa unit h-1。
Further, the temperature of the process of obtaining the DO-t curve of the respiratory map in the step 2) is controlled to be 8-40 ℃.
Further, in the step 3), the respiration atlas DO-t curve is converted into a corresponding respiration atlas OUR-t curve, and the corresponding respiration atlas OUR-t curve is obtained through the following conversion formula:
wherein,is the derivative of the actual dissolved oxygen value on the DO-t curve of the respiration atlas to time, kLa is aeration quantity parameters of the aeration equipment, C is a saturated dissolved oxygen value under the condition of sludge existence, C is an actual dissolved oxygen value, and OUR is a respiration rate OUR.
Further, in the step 1), the buffer solution for cleaning the sludge is a PBS buffer solution, and the buffer solution is a mixed solution of the following components:
A：KH2PO4the concentration is 1.5 to 2.5 mmol.L-1；
B：Na2HPO4The concentration is 8-12 mmol.L-1；
C: NaCl concentration of 135-140 mmol/L-1；
D: KCl concentration of 2.5-3.0 mmol/L-1。
Further, in the step 5), the starting point A of the DO-t curve of the breathing pattern is the same time point with the added organic matter; a respiratory rate OUR mutation point B on the respiratory map OUR-t curve is a turning point in the process that the respiratory rate OUR is extremely reduced to be stable, and a corresponding point B' on the respiratory map DO-t curve is a corresponding point on the respiratory map DO-t curve at the same moment of the point B; the respiratory rate OUR change termination point C on the respiratory atlas OUR-t curve is a turning point in the process that the respiratory rate OUR change is small and tends to be constant, and the corresponding point C' on the respiratory atlas DO-t curve is the corresponding point on the respiratory atlas DO-t curve at the same moment of the point C.
The invention has the following advantages:
1) the method finds the relationship between the area ratio of the area II to the area I of the respiratory map area and the actual phosphorus removal efficiency, can accurately and efficiently evaluate the phosphorus removal efficiency of the activated sludge, further provides an effective judgment method for solving the problem of water eutrophication, and has certain guiding significance.
2) The method of the invention is convenient for detection. The steps are simple and easy to implement, and the testing equipment is automated, for example, the intelligent operation workstation for WBM series sewage treatment provided by the Xian Green Standard Water environmental science and technology Limited company is used, so that the sludge to be tested can be automatically tested under the condition of no operation.
Drawings
FIG. 1 is a DO-t curve of a D respiration profile of a sewage plant and a corresponding OUR-t curve of the respiration profile.
FIG. 2 is a graph showing the relationship between the area ratio of the area II to the area I on the DO-t curve of the respiratory map and the actual dephosphorization efficiency of a sewage plant.
Detailed Description
The invention is further illustrated by the following figures and examples.
The invention evaluates the dephosphorization efficiency of the activated sludge by analyzing the respiratory map of the activated sludge.
The invention evaluates the dephosphorization efficiency of activated sludge, and comprises the following steps:
1) taking activated sludge of a sewage treatment plant, washing the activated sludge for multiple times by using a buffer solution, and fully aerating to enable the activated sludge to enter an endogenous respiration state;
the buffer solution is a mixed solution of the following components:
a: the concentration of KH2PO4 is 1.5-2.5 mmol/L-1；
B: the Na2HPO4 concentration is 8-12 mmol.L-1；
C: NaCl concentration of 135-140 mmol/L-1；
D: KCl concentration of 2.5-3.0 mmol/L-1。
2) Selecting aeration quantity parameter k of aeration equipmentLa, in the step 1) of entering the sludge in endogenous respiration state, according to a selected parameter kLa, controlling the addition amount S of organic matters (single carbon source: sodium acetate, glucose or mixed carbon source: domestic sewage), and adjusting aeration parameters according to the actual phosphorus removal characteristics of sludge to obtain a respiration pattern DO-t curve; the control temperature in the process of obtaining the DO-t curve is 8-40 ℃;
the DO-t curve of the respiratory map meets the following conditions:
duration t of DO drop phase1：5≤t1≤25min；
The descending amplitude △ DO of the DO descending stage is more than or equal to 0.2 and less than or equal to △ DO and less than or equal to 6.0 mg/L;
total duration t of DO-t curve3，120≤t3≤600min。
And, the respiratory map DO-t curve is obtained by the following condition control:
2a) adjusting the addition amount S of the organic matters and the concentration MLSS of the activated sludge diluent, and adjusting the adjustment range of the concentration MLSS of the activated sludge diluent to be 250-5000 mg/L; controlling duration t of DO drop phase1：5≤t1The DO drop amplitude △ DO is not less than 25min and 0.2 not less than △ DO not less than 6.0mg/L, wherein △ DO refers to the difference value of DO at the starting point A of a DO-t curve of the respiratory map and DO at the end point D of a DO drop stage;
duration t when DO falls1If the DO is reduced within 5min or the DO reduction amplitude △ DO is less than 0.2mg/L, the adding amount of the organic matter S or the concentration MLSS of the activated sludge diluent is increased;
duration t when DO falls1When the DO is reduced for more than 25min or the DO reduction amplitude △ DO is more than 6.0mg/L, the quantity S of organic matters or the concentration MLSS of the activated sludge diluent is reduced;
continuously adjusting the addition amount S of organic matters and the concentration MLSS of the activated sludge diluent to ensure the duration t of the DO reduction stage1：5≤t1The DO reduction range is △ DO of not less than 25min and 0.2 not less than △ DO not less than 6.0 mg/L;
2b) keeping the addition amount S of the organic matters and the concentration MLSS of the activated sludge diluent obtained in the step 2a) unchanged, and adjusting the aeration quantity parameter k of the aeration equipmentLa, total duration t of control curve3：120≤t3Less than or equal to 600 min; wherein, t3The time point when the slope change of the curve tends to zero;
keep satisfying the duration t of the DO descent phase1The adding amount S of organic matters and the concentration MLSS of the activated sludge diluent are not changed under the condition of DO reduction amplitude △ DO, and when the total duration t of the curve is3When the time is less than 120min, the aeration quantity parameter k of the aeration equipment is reducedLa; when curve total duration t3When the time is more than 600min, the aeration quantity parameter k of the aeration equipment is increasedLa; by continuously adjusting kLa, making the total duration t of the curve3：120≤t3≤600min；
2c) If the above step 2b) is performed by continuously adjusting kLa, aeration quantity parameter k of aeration equipmentLa total duration t of the curve can not be realized within a controllable range3：120≤t3Adjusting the addition amount S of organic substances within 600min or less, and maintaining the duration t of DO lowering stage1：5≤t1The total duration t of the curve is realized under the premise that the DO is not less than 25min and the DO reduction amplitude △ DO is not less than 0.2 and not more than △ DO and not more than 6.0mg/L3：120≤t3≤600min；
2d) The amount S of organic matter and the aeration parameter k of the aeration apparatus determined in combination in the above steps 2a), 2b) and 2c)LUnder the condition a, obtaining a DO-t curve, namely a respiration atlas DO-t curve, and simultaneously obtaining the inflection point occurrence time t of the respiration atlas DO-t curve at the rising stage2：30≤t2≤300min。
By the condition control of obtaining the DO-t curve of the respiratory map, the aeration quantity parameter k according to the aeration equipment can be obtainedLa, controlling the addition amount S of organic matters to obtain a respiration pattern DO-t curve, wherein the control method comprises the following steps:
2 a') if the organic substance is a single carbon source of sodium acetate, the corresponding relationship in value is S ═ 0.23 to 136 kLa；
2 b') if the organic substance is glucose as a sole carbon source, the numerical correspondence is S ═ 0.38 to 231 kLa；
2 c') if the organic matter is a mixed carbon source domestic sewage, the numerical correspondence is S ═ 1.25 to 750 kLa. The addition amount of S unit mg/L, kLa unit h-1。
3) Selecting saturated dissolved oxygen value C in the presence of sludge, and combining the aeration parameter k of the aeration equipment selected in the step 2)La according to formulaConverting the DO-t curve of the respiratory atlas obtained in the step 2) into an OUR-t curve of the respiratory atlas;
wherein,is the derivative of the actual dissolved oxygen value on the DO-t curve of the respiration atlas to time, kLa is aeration quantity parameter k of aeration equipmentLand a, C is a saturated dissolved oxygen value in the presence of the sludge, C is an actual dissolved oxygen value, and OUR is a respiration rate OUR.
4) Determining a respiratory rate OUR mutation point B and a respiratory rate OUR change termination point C on the respiratory atlas OUR-t curve obtained in the step 3), and then finding a point B 'corresponding to the respiratory rate OUR mutation point B and a point C' corresponding to the respiratory rate OUR change termination point C on the corresponding respiratory atlas DO-t curve; connecting an initial point A and a point C ' of a DO-t curve of a respiratory atlas, dividing the DO-t curve of the respiratory atlas into two areas by taking a connecting line of two points A, B ' on the DO-t curve of the respiratory atlas as a boundary line, and forming an area I by the connecting line AB ' and the DO-t curve of the respiratory atlas; a connecting line AB ', a connecting line AC' and a respiration atlas DO-t curve form an area II;
the starting point A of the DO-t curve of the respiratory atlas is the same time point with the added organic matter; a respiratory rate OUR mutation point B on the respiratory map OUR-t curve is a turning point in the process that the respiratory rate OUR is extremely reduced to be stable, and a corresponding point B' on the respiratory map DO-t curve is a corresponding point on the respiratory map DO-t curve at the same moment of the point B; the respiratory rate OUR change termination point C on the respiratory atlas OUR-t curve is a turning point in the process that the respiratory rate OUR change is small and tends to be constant, and the corresponding point C' on the respiratory atlas DO-t curve is the corresponding point on the respiratory atlas DO-t curve at the same moment of the point C.
5) And evaluating the phosphorus removal efficiency of the activated sludge according to the area ratio of the area II to the area I, wherein the larger the area ratio of the area II to the area I is, the higher the phosphorus removal efficiency of the activated sludge is.
The effects of the present invention will be further described below by way of specific examples.
1) Activated sludge from a plurality of sewage treatment plants in the city of Xian is sampled (the summary of each sewage treatment plant is shown in Table 1);
2) selecting WBM450 series intelligent operation workstations provided by Xian green standard water environment science and technology limited company as equipment for obtaining an activated sludge respiration pattern DO-t curve;
3) taking activated sludge of a sewage treatment plant, adding tap water according to the volume ratio of 1:3 for dilution, stirring, precipitating, removing supernatant, fixing the volume of the activated sludge sample to 1/2 volume of activated sludge diluent, washing the sludge for 3 times by using PBS buffer solution, then adding tap water to fix the volume of the activated sludge mixed solution to the original volume of the activated sludge diluent, and aerating for 2 hours (the activated sludge enters an endogenous respiration state).
Buffer solution PBS:
A:KH2PO4the concentration is 1.7 mmol.L-1；
B：Na2HPO4The concentration is 10 mmol.L-1；
C: NaCl concentration 137 mmol. L-1；
D: KCl concentration of 2.8 mmol. L-1。
4) Selecting aeration quantity parameter k of aeration equipmentLa＝10.06h-1In step 3) into endogenous respired sludge, according to a selected parameter kLa＝10.06h-1Controlling the amount S of sodium acetate added as a single carbon source to be 3kLa, namely 30.18mg/L, obtaining a respiration pattern DO-t curve at the temperature of 20 +/-0.5 ℃, and shown in a figure 1;
5) selecting the saturated dissolved oxygen value C-8.4 mg/L under the condition of sludge existence, and combining the aeration parameter k of the selected aeration equipment in the step 4)La＝10.06h-1According to the formulaConverting the DO-t curve of the respiratory atlas obtained in the step 4) into an OUR-t curve of the respiratory atlas;
wherein,is the derivative of the actual dissolved oxygen value on the DO-t curve of the respiration atlas to time, kLa is aeration quantity parameter k of aeration equipmentLand a, C is a saturated dissolved oxygen value in the presence of the sludge, C is an actual dissolved oxygen value, and OUR is a respiration rate OUR.
And determining a respiratory rate OUR mutation point B and a respiratory rate OUR change termination point C on the obtained respiratory atlas OUR-t curve, and then finding a point B 'corresponding to the respiratory rate OUR mutation point B and a point C' corresponding to the respiratory rate OUR change termination point C on the corresponding respiratory atlas DO-t curve. Connecting an initial point A and a point C ' of a DO-t curve of a respiratory atlas, dividing the DO-t curve of the respiratory atlas into two areas by taking a connecting line of two points A, B ' on the DO-t curve of the respiratory atlas as a boundary line, and forming an area I by the connecting line AB ' and the DO-t curve of the respiratory atlas; a connecting line AB ', a connecting line AC' and a respiration atlas DO-t curve form an area II;
example analysis:
the area ratio of the area II to the area I on the DO-t curves of the respiratory maps of the four sewage treatment plants (A, B, C and D) is related to the actual dephosphorization efficiency of the sewage treatment plants, as shown in figure 2. And (3) taking the activated sludge of each large water plant to obtain a respiration map DO-t curve, and obtaining the area ratio of each area II to area I, wherein the size sequence of D is more than C and more than B is more than A. The actual dephosphorization efficiency of the sewage treatment plant is obtained by measuring the inlet water TP and the outlet water TP of each large sewage treatment plant, and the sizes of the sewage treatment plants are sorted as follows: d > C > B > A. Obviously, the area ratio of the area II to the area I obtained by testing the activated sludge of the four sewage treatment plants is consistent with the corresponding actual phosphorus removal efficiency high-low sequence, and is completely consistent with the actual phosphorus removal efficiency high-low sequence. That is, the actual dephosphorization efficiency of the water plant can be accurately evaluated by obtaining a respiration map DO-t curve from activated sludge of the sewage treatment plant and calculating the area ratio of the area II to the area I, which is shown in Table 2.
In conclusion, the invention is a method for evaluating the phosphorus removal efficiency of activated sludge based on the respiratory map.
TABLE 1 overview of the Sewage treatment plant
Table 2 different sewage treatment plant examples
As described above, the preferred embodiment of the present invention is described, but the scope of the present invention is not limited thereto, and the duration t of the DO-drop phase of the DO-t curve is controlled by adjusting the amount S of the organic matter added and the concentration MLSS of the activated sludge diluent1DO reduction △ DO and total duration t of the curve3Thus, in obtaining the DO-t curve of the respiration profile, Table 2 shows only the preferred embodiments, and the claimed organic matter is a single carbon source and a mixed carbon source in numerical terms with kLThe numerical protection range of the corresponding relation a can meet the requirement of obtaining a DO-t curve of the respiratory atlas. Any changes or substitutions that may be easily made by those skilled in the art within the technical scope of the present disclosure are intended to be included within the scope of the present disclosure.

Claims (8)

1. A method for evaluating the phosphorus removal efficiency of activated sludge based on a respiratory map is characterized by comprising the following steps:
1) taking activated sludge of a sewage treatment plant, washing the activated sludge for multiple times by using a buffer solution, and fully aerating to enable the activated sludge to enter an endogenous respiration state;
2) selecting aeration quantity parameter k of aeration equipmentLa, in the activated sludge entering the endogenous respiration state in the step 1), according to a selected aeration parameter kLa, controlling the addition amount S of the organic matters according to the actual content of the activated sludgeAdjusting aeration quantity parameters to obtain a DO-t curve of a respiratory map;
3) selecting saturated dissolved oxygen value C in the presence of activated sludge, and combining the aeration parameter k of the aeration equipment selected in the step 2)La, converting the respiration atlas DO-t curve obtained in the step 2) into a respiration atlas OUR-t curve according to a formula, and obtaining the respiration atlas OUR-t curve through the following conversion formula:
wherein,the derivative of the actual dissolved oxygen value on a DO-t curve of a respiration map to time is shown, kLa is an aeration parameter of aeration equipment, C is a saturated dissolved oxygen value under the condition of sludge existence, C is the actual dissolved oxygen value, and OUR is a respiration rate OUR;
the DO-t curve of the respiratory map meets the following conditions:
duration t of DO drop phase1：5≤t1≤25min；
The descending amplitude △ DO of the DO descending stage is more than or equal to 0.2 and less than or equal to △ DO and less than or equal to 6.0 mg/L;
total duration t of DO-t curve3，120≤t3≤600min；
4) Determining a respiratory rate OUR mutation point B and a respiratory rate OUR change termination point C on the respiratory atlas OUR-t curve obtained in the step 3), and then finding a point B 'corresponding to the respiratory rate OUR mutation point B and a point C' corresponding to the respiratory rate OUR change termination point C on the corresponding respiratory atlas DO-t curve; connecting an initial point A and a point C ' of a DO-t curve of a respiratory atlas, dividing the DO-t curve of the respiratory atlas into two areas by taking a connecting line of two points A, B ' on the DO-t curve of the respiratory atlas as a boundary line, and forming an area I by the connecting line AB ' and the DO-t curve of the respiratory atlas; a connecting line AB ', a connecting line AC' and a respiration atlas DO-t curve form an area II;
the respiratory rate OUR mutation point B on the respiratory map OUR-t curve is a turning point in the process that the respiratory rate OUR is decreased to be stable; the respiratory rate OUR change termination point C on the respiratory map OUR-t curve is a turning point in the process that the respiratory rate OUR change is very small to tend to be constant;
5) and evaluating the phosphorus removal efficiency of the activated sludge according to the area ratio of the area II to the area I, wherein the larger the area ratio of the area II to the area I is, the higher the phosphorus removal efficiency of the activated sludge is.
2. The method for evaluating the phosphorus removal efficiency of the activated sludge based on the respiratory map as claimed in claim 1, wherein in the step 1), the specific process of the activated sludge entering the endogenous respiratory state is as follows:
taking activated sludge of a sewage treatment plant, adding tap water according to the volume ratio of 1:3 for dilution, stirring, precipitating, removing supernatant, fixing the volume of an activated sludge sample to 1/2 volume of activated sludge diluent, washing sludge for 3 times by using PBS buffer solution, then adding tap water to fix the volume of activated sludge mixed liquid to the original volume of the activated sludge diluent, aerating for 2 hours, and enabling the activated sludge to enter an endogenous respiration state.
3. The method for evaluating the phosphorus removal efficiency of the activated sludge based on the respiration map as claimed in claim 1, wherein in the step 2), the respiration map DO-t curve is obtained by controlling the following conditions:
2a) adjusting the addition amount S of organic matters and the concentration MLSS of the activated sludge diluent, and controlling the duration t of the DO reduction stage1：5≤t1The DO reduction range is △ DO of not less than 25min and 0.2 not less than △ DO not less than 6.0 mg/L;
△ DO is the difference value of DO at the starting point A of a DO-t curve of the respiratory map and DO at the ending point D of a DO descending stage;
duration t when DO falls1If the DO is reduced within 5min or the DO reduction amplitude △ DO is less than 0.2mg/L, the adding amount of the organic matter S or the concentration MLSS of the activated sludge diluent is increased;
duration t when DO falls1When the DO is reduced for more than 25min or the DO reduction amplitude △ DO is more than 6.0mg/L, the quantity S of organic matters or the concentration MLSS of the activated sludge diluent is reduced;
by continuously adjusting the addition amount of organic mattersS and activated sludge Diluent concentration MLSS, duration t of DO drop phase1：5≤t1The DO reduction range is △ DO of not less than 25min and 0.2 not less than △ DO not less than 6.0 mg/L;
2b) keeping the addition amount S of the organic matters and the concentration MLSS of the activated sludge diluent obtained in the step 2a) unchanged, and adjusting the aeration quantity parameter k of the aeration equipmentLa, controlling the total duration t of the DO-t curve3：120≤t3≤600min；
Wherein, t3The time point when the slope change of the curve tends to zero;
keep satisfying the duration t of the DO descent phase1The adding amount S of organic matters and the concentration MLSS of the activated sludge diluent are not changed under the condition of DO reduction amplitude △ DO, and when the total duration t of the curve is3When the time is less than 120min, the aeration quantity parameter k of the aeration equipment is reducedLa; when curve total duration t3When the time is more than 600min, the aeration quantity parameter k of the aeration equipment is increasedLa; by continuously adjusting kLa, making the total duration t of the curve3：120≤t3≤600min；
2c) If the above step 2b) is performed by continuously adjusting kLa, aeration quantity parameter k of aeration equipmentLa total duration t of the curve can not be realized within a controllable range3：120≤t3Adjusting the addition amount S of organic substances within 600min or less, and maintaining the duration t of DO lowering stage1：5≤t1The total duration t of the curve is realized under the premise that the DO is not less than 25min and the DO reduction amplitude △ DO is not less than 0.2 and not more than △ DO and not more than 6.0mg/L3：120≤t3≤600min；
2d) The amount S of organic matter and the aeration parameter k of the aeration apparatus determined in combination in the above steps 2a), 2b) and 2c)LUnder the condition a, obtaining a DO-t curve, namely a respiration atlas DO-t curve, and simultaneously obtaining the inflection point occurrence time t of the respiration atlas DO-t curve at the rising stage2：30≤t2≤300min。
4. The method for evaluating the phosphorus removal efficiency of the activated sludge based on the respiratory map as claimed in claim 3, wherein the adjustment range of the concentration MLSS of the dilution of the activated sludge is 250-5000 mg/L.
5. The method for evaluating the phosphorus removal efficiency of the activated sludge based on the respiration map as claimed in claim 1, wherein the organic matter is a single carbon source: sodium acetate, glucose, or as a mixed carbon source: domestic sewage; step 2) according to the selected aeration parameter k of the aeration equipmentLa, controlling the addition amount S of the organic matters, wherein the control method comprises the following steps:
2 a') if the organic substance is a single carbon source of sodium acetate, the corresponding relationship in value is S ═ 0.23 to 136 kLa；
2 b') if the organic substance is glucose as a sole carbon source, the numerical correspondence is S ═ 0.38 to 231 kLa；
2 c') if the organic matter is a mixed carbon source domestic sewage, the numerical correspondence is S ═ 1.25 to 750 kLa; the addition amount of S unit mg/L, kLa unit h-1。
6. The method for evaluating the phosphorus removal efficiency of the activated sludge based on the respiration map as claimed in claim 1, wherein the temperature of the process of obtaining the DO-t curve of the respiration map in the step 2) is controlled to be 8-40 ℃.
7. The method for evaluating the phosphorus removal efficiency of the activated sludge based on the respiratory map as claimed in claim 1, wherein in the step 1), the buffer solution for cleaning the sludge is a PBS buffer solution, and the buffer solution is a mixed solution of the following components:
A：KH2PO4the concentration is 1.5 to 2.5 mmol.L-1；
B：Na2HPO4The concentration is 8-12 mmol.L-1；
C: NaCl concentration of 135-140 mmol/L-1；
D: KCl concentration of 2.5-3.0 mmol/L-1。
8. The method for evaluating the phosphorus removal efficiency of the activated sludge based on the respiration map as claimed in claim 1, wherein in the step 5), the starting point A of the DO-t curve of the respiration map is the same time point with the addition of organic matters; the corresponding point B' of the respiratory rate OUR mutation point B on the respiratory atlas OUR-t curve on the respiratory atlas DO-t curve is the corresponding point on the respiratory atlas DO-t curve at the same moment as the point B; and a corresponding point C' of a respiratory rate OUR change termination point C on the respiratory atlas OUR-t curve on the respiratory atlas DO-t curve is a corresponding point C on the respiratory atlas DO-t curve at the same moment.
CN201610585761.7A 2016-07-22 2016-07-22 A method of activated sludge dephosphorizing efficiency is assessed based on breathing map Active CN106045046B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610585761.7A CN106045046B (en) 2016-07-22 2016-07-22 A method of activated sludge dephosphorizing efficiency is assessed based on breathing map

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610585761.7A CN106045046B (en) 2016-07-22 2016-07-22 A method of activated sludge dephosphorizing efficiency is assessed based on breathing map

Publications (2)

Publication Number Publication Date
CN106045046A CN106045046A (en) 2016-10-26
CN106045046B true CN106045046B (en) 2018-12-14

Family

ID=57417314

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610585761.7A Active CN106045046B (en) 2016-07-22 2016-07-22 A method of activated sludge dephosphorizing efficiency is assessed based on breathing map

Country Status (1)

Country Link
CN (1) CN106045046B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106896190B (en) * 2017-02-23 2019-04-05 西安建筑科技大学 Whether there is or not the methods of nitrate nitrogen and assessment sludge phosphorus removal property in a kind of judgement returned sludge

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101540008A (en) * 2009-04-24 2009-09-23 北京工业大学 Analogy method based on activated sludge purification process of HPP cellular automaton model
CN102874919A (en) * 2012-10-08 2013-01-16 上海电力学院 Method for estimating difficulty of biological nitrogen and phosphorus removal in wastewater treatment
JP5347711B2 (en) * 2009-05-21 2013-11-20 新日鐵住金株式会社 Detection method of harmful substances in water
CN103922461A (en) * 2014-01-13 2014-07-16 扬州大学 Method for monitoring biological treatment oxygen uptake rate of sewage and controlling aeration quantity
CN105699601A (en) * 2016-03-16 2016-06-22 西安建筑科技大学 Method for determining activated sludge treatment capacity

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8748138B2 (en) * 2009-12-10 2014-06-10 Veolia Water Solutions & Technologies Support Method for accumulation of polyhydroxyalkanoates in biomass with on-line monitoring for feed rate control and process termination

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101540008A (en) * 2009-04-24 2009-09-23 北京工业大学 Analogy method based on activated sludge purification process of HPP cellular automaton model
JP5347711B2 (en) * 2009-05-21 2013-11-20 新日鐵住金株式会社 Detection method of harmful substances in water
CN102874919A (en) * 2012-10-08 2013-01-16 上海电力学院 Method for estimating difficulty of biological nitrogen and phosphorus removal in wastewater treatment
CN103922461A (en) * 2014-01-13 2014-07-16 扬州大学 Method for monitoring biological treatment oxygen uptake rate of sewage and controlling aeration quantity
CN105699601A (en) * 2016-03-16 2016-06-22 西安建筑科技大学 Method for determining activated sludge treatment capacity

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Changes in respiratory quinone profiles of enhanced biological phosphorus removal activated sludge under different influent phosphorus/carbon ratio conditions;Johwan Ahn;《Bioprocess and Biosystems Engineering》;20060624;第29卷(第3期);第143-148页 *
基于呼吸图谱的自养菌与异养菌内源呼吸过程分析;李志华;《环境科学》;20140930;第35卷(第9期);第3492-3497页 *

Also Published As

Publication number Publication date
CN106045046A (en) 2016-10-26

Similar Documents

Publication Publication Date Title
CN110451661B (en) Prediction model of microbial soluble organic nitrogen in sewage and application thereof
Cook et al. Dissolved organic carbon in old field soils: total amounts as a measure of available resources for soil mineralization
Isanta et al. Long term operation of a granular sequencing batch reactor at pilot scale treating a low-strength wastewater
Guo et al. Long-term effect of dissolved oxygen on partial nitrification performance and microbial community structure
Pedrouso et al. Pilot-scale ELAN® process applied to treat primary settled urban wastewater at low temperature via partial nitritation-anammox processes
Miao et al. Optimization of three-stage Anammox system removing nitrogen from landfill leachate
CN106745822B (en) A method of active sludge microorganism suspend mode and loss are differentiated based on breathing map
CN108414716B (en) Device and method for detecting organic matter components of sewage
Seco et al. Plant-wide modelling in wastewater treatment: showcasing experiences using the Biological Nutrient Removal Model
Wang et al. Nitrous oxide emissions from a typical northern Chinese municipal wastewater treatment plant
CN204752319U (en) N2O -SBR biological reaction device
CN106745734B (en) Method for analyzing nitrous oxide discharge rate in nitrification and denitrification processes of single-stage biological denitrification system
Dobbeleers et al. Biological nutrient removal from slaughterhouse wastewater via nitritation/denitritation using granular sludge: an onsite pilot demonstration
KR20200068618A (en) Hydroponics drainage processing system and control method thereof
CN106045046B (en) A method of activated sludge dephosphorizing efficiency is assessed based on breathing map
Dobbeleers et al. Evaluation of two start‐up strategies to obtain nitrogen removal via nitrite and examination of the nitrous oxide emissions for different nitritation levels during the treatment of slaughterhouse wastewater
Shilton Ammonia volatilization from a piggery pond
Picot et al. Nitrogen removal in wastewater stabilisation ponds
CN112573641A (en) Sewage treatment capacity determining method and device
Matassa et al. Ammonia stripping from buffalo manure digestate for future nitrogen upcycling into bio-based products
CN201942563U (en) Phosphate accumulating organisms (PAO) enrichment equipment
Putro et al. Biomethane emissions: Measurement in wastewater pond at palm oil mill by using TGS2611 methane gas sensor
Wentzel et al. Fundamentals of biological behaviour and wastewater strength tests
CN110579567B (en) Method for evaluating denitrification effect of activated sludge based on respiratory map
Van Wageningen et al. Development of a kinetic model for biological sulphate reduction with primary sewage sludge as substrate

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant