CN116282526A - Method for enriching anaerobic ammonia oxidation bacteria in denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge - Google Patents

Method for enriching anaerobic ammonia oxidation bacteria in denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge Download PDF

Info

Publication number
CN116282526A
CN116282526A CN202310517267.7A CN202310517267A CN116282526A CN 116282526 A CN116282526 A CN 116282526A CN 202310517267 A CN202310517267 A CN 202310517267A CN 116282526 A CN116282526 A CN 116282526A
Authority
CN
China
Prior art keywords
denitrification
tank
concentration
filter
sludge
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.)
Pending
Application number
CN202310517267.7A
Other languages
Chinese (zh)
Inventor
马斌
何禹雄
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.)
Hainan University
Original Assignee
Hainan University
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 Hainan University filed Critical Hainan University
Priority to CN202310517267.7A priority Critical patent/CN116282526A/en
Publication of CN116282526A publication Critical patent/CN116282526A/en
Pending legal-status Critical Current

Links

Images

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
    • C02F3/28—Anaerobic digestion processes
    • 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
    • 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
    • C02F3/302—Nitrification and denitrification treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C02F2101/163—Nitrates
    • 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
    • C02F2209/005—Processes using a programmable logic controller [PLC]
    • 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
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • 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
    • C02F2209/14—NH3-N
    • 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
    • C02F2209/15—N03-N
    • 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

  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention discloses a method for enriching anaerobic ammonia oxidation bacteria in a denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge. The method comprises inoculating conventional activated sludge (natural low-abundance anaerobic ammonia oxidizing bacteria) of a local sewage treatment plant in a denitrification starting stage; in the operation stage, a PLC automatic controller is arranged in the denitrification filter tank: ammonia nitrogen, nitrite nitrogen and nitrate nitrogen on-line monitoring sensor. The water inlet and outlet data in the denitrification filter are collected on line, so that the PLC control system automatically regulates and controls the proportion of the introduced raw water and the carbon source adding amount, thereby ensuring that short-range denitrification occurs in the denitrification filter to produce nitrite nitrogen, ensuring that the substrate of anaerobic ammoxidation is sufficient, realizing in-situ enrichment of the anaerobic ammoxidation, gradually transitioning the traditional denitrification filter into a short-range denitrification anaerobic ammoxidation filter, simultaneously reducing the manual carbon source adding amount of the denitrification filter, and reducing the cost of upgrading the denitrification filter into the short-range denitrification anaerobic ammoxidation filter.

Description

Method for enriching anaerobic ammonia oxidation bacteria in denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge
Technical Field
The invention relates to a method for enriching anaerobic ammonia oxidation bacteria in a denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge, belonging to the field of sewage treatment. Is suitable for secondary effluent of sewage treatment plants containing nitrate.
Background
The denitrification biological filter is widely used for removing residual nitrate of secondary effluent of a sewage treatment plant. In the denitrification biological filter, organic matters are used as electron donors, and the residual nitrate of the secondary effluent is reduced into nitrogen. However, the effluent of the secondary sedimentation tank is limited in biodegradable organic matters, and organic matters are required to be additionally introduced into DNBF, so that the cost for treating the residual nitrate of the secondary effluent of the sewage treatment plant is high, and more energy-saving technology is required to be innovated.
Short-cut denitrification/anaerobic ammoxidation is a novel low-carbon energy-saving denitrification technology. Short-cut denitrification utilizes the activity difference between nitrate reductase and nitrite reductase, the reduction rate of nitrate is higher than that of nitrite, and COD/NO is controlled 3 - Part of nitrate is converted into nitrite, so that accumulation of nitrite can be realized, and the anaerobic ammonia oxidizing bacteria can realize autotrophic denitrification by utilizing ammonia nitrogen and nitrite without participation of an organic carbon source. The combination of short-range denitrification and anaerobic ammoxidation successfully realizes the low-carbon energy-saving denitrification treatment effect in the biological filter, and compared with the traditional denitrification biological filter, a large amount of artificially added carbon sources can be saved.
However, in practical applications, if the short-cut denitrification/anaerobic ammoxidation biofilter is to be used instead of the denitrification biofilter, two major problems are faced: 1) How does a sewage treatment plant continue to maintain the ability to treat secondary sedimentation tank effluent while the denitrification biological filter is upgraded and retrofitted? 2) If anaerobic ammonia oxidation sludge is directly inoculated in the denitrification biological filter, a large amount of mature anaerobic ammonia oxidation sludge is required to be purchased, huge cost investment is brought to upgrading and reconstruction of the filter, and a large amount of sludge has corresponding difficulty in the transportation process.
Fortunately, anaerobic ammonia oxidation bacteria are widely distributed in the environment, low-abundance anaerobic ammonia oxidation bacteria are also detected in a sewage treatment plant, and if a proper method can be adopted to directly enrich anaerobic ammonia oxidation bacteria in a local biological filter to promote the upgrading of the traditional denitrification filter to be changed into the application of a short-range denitrification/anaerobic ammonia oxidation filter, the method has important significance.
Disclosure of Invention
Based on the key problems, the invention develops a method for enriching anaerobic ammonia oxidation bacteria in a denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonia oxidation sludge in order to directly enrich anaerobic ammonia oxidation bacteria in the denitrification filter.
The technical scheme of the invention is realized as follows:
the method for enriching anaerobic ammonia oxidation bacteria by a denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge is characterized in that an applied device is provided with an urban sewage raw water tank (1), an AO biochemical tank (2), a secondary sedimentation tank (3), a carbon source adding tank (4), a mixing tank (5), a denitrification filter (6), a back flushing wastewater tank (7), a clean water tank (8) and a PLC automatic control system (9), and the method comprises the following steps:
s1: inoculating activated sludge of a traditional sewage treatment plant to a denitrification biological filter to enable the activated sludge to be coated on a filter material; recording the effluent NO of the secondary sedimentation tank 3 - -N concentration of a, NH 4 + -N concentration b, flow Q1; raw sewage NH 4 + -N concentration is c, COD concentration is d, and drainage flow is Q2; the COD concentration of the carbon source adding pool is e, and the flow is Q3; water inlet NH of denitrification filter 4 + -N concentration f, initially f is set to 3mg/L; denitrifying filter pond effluent NH 4 + -N concentration is g, effluent NO 2 - The concentration of N is h, and the effluent NO 3 - -N concentration is i; q is the total flow of the original sewage;
s2: collecting NO in secondary sedimentation tank on line every 5min by using sensor 3 - -N concentration a and NH 4 + N concentration b, raw sewage NH 4 + The concentration c of N and the concentration d of COD can be directly measured, and the concentration e of COD in the carbon adding tank can be directly measured, and the sensor is used for collecting NH of water entering the denitrification filter tank every 5min on line 4 + -N concentration f and NH of effluent 4 + N concentration g, NO 2 - -N concentration h, NO 3 - N concentration i, collecting the secondary sedimentation tank effluent flow Q1, the raw sewage drainage flow Q2 and the carbon adding flow by using an online flow monitorAn amount Q3;
the individual flows of the whole process are calculated as follows:
Q2＝(b+c-f)/c*Q
Q1＝Q-Q2
Q3＝(4a*Q1-f*Q-d*Q2)/e
further, an ammonia nitrogen concentration sensor (1.1) and a COD concentration sensor (1.2) are arranged in the raw sewage tank (1); a nitrate nitrogen concentration sensor (3.2) is arranged in the secondary sedimentation tank (3); a COD concentration sensor (4.1) is arranged in the carbon source adding pool (4); an ammonia nitrogen concentration sensor (6.2) is arranged at the water inlet end of the denitrification filter, and an ammonia nitrogen concentration sensor (6.4), a nitrite nitrogen sensor (6.5) and a nitrate nitrogen sensor (6.6) are arranged at the water outlet end.
Further described, the raw sewage tank (1) is connected with the AO biochemical tank (2); the original sewage tank is connected with the mixing tank (5) through a drainage pump (5.1), and the drainage pump is connected with a PLC control system (9); the outlet pipe of the AO biochemical tank is connected with a secondary sedimentation tank (3); the secondary sedimentation tank is connected with the AO biochemical tank through a sludge reflux pump (3.1); the secondary sedimentation tank is connected with the mixing tank (5) through a secondary sedimentation tank water outlet pipe; the carbon source adding pool is connected with the mixing pool (5) through a carbon source adding pump (5.2), and the mixing pool is provided with a stirrer (5.3); the water outlet pipe of the mixing tank is connected with a water inlet pump (6.1) of the denitrification filter; the denitrification filter (6) is filled with ceramsite filter materials (6.3) and traditional activated sludge.
Further, the drainage pump (5.1), the carbon source feeding pipe and the secondary sedimentation tank water outlet pipe are respectively provided with a flow monitor (5.5), (5.6) and (5.4), the sensor or the flow monitor are connected with the PLC control system, the denitrification filter (6) is provided with a water outlet pipe, the water outlet pipe is simultaneously connected with the back flush wastewater tank (7) and the clean water tank (8), and the back flush wastewater tank (7) and the clean water tank (8) are respectively provided with a water outlet pipe.
Further, all data measured by any sensor or detector are transmitted to the PLC automatic control system for operation.
Further, at the beginning of the whole process, Q2 is set to 0, the COD concentration e in the carbon source adding pool is set to 150g/L, and f is set to 3mg/L.
Further described, the overall process, after start-up, includes the following regulatory schemes:
the ammonia nitrogen regulation mode of denitrification filter tank water inlet: if the NH of the effluent of the denitrification filter is monitored 4 + The N concentration g lasts for 2 days and is smaller than 1mg/L, the PLC automatic control system transmits an adjusting signal to the drainage pump, so that the pump speed of the drainage pump is increased by 1% -3% until f=f+2; otherwise stopping regulation and control, and keeping f unchanged;
the method for regulating the nitrite nitrogen in the effluent of the denitrification filter tank comprises the following steps: if the denitrification filter tank is discharged with NO 2 - The N concentration h is smaller than 2mg/L, and the PLC automatic control system transmits the adjusting signal to the carbon source adding pump, so that the pump speed of the carbon source adding pump is reduced according to the proportion of 1% -3%; if h is more than 4mg/L, the PLC automatic control system transmits an adjusting signal to the carbon source adding pump, so that the pump speed of the carbon source adding pump is increased by 1% -3%; otherwise stopping regulation and control, and maintaining h unchanged;
the method for regulating the nitrate nitrogen in the effluent of the denitrification filter comprises the following steps: if the denitrification filter tank is discharged with NO 3 - The N concentration i is larger than 5mg/L, the PLC automatic control system transmits the adjusting signal to the carbon source adding pump, so that the pump speed of the carbon source adding pump is increased according to the proportion of 1% -3%; otherwise, stopping regulation and control, and keeping i unchanged.
The technical principle of the invention is as follows:
an ammonia nitrogen concentration sensor and a COD concentration sensor are arranged in the original sewage tank; a nitrate nitrogen concentration sensor is arranged in the secondary sedimentation tank; a COD concentration sensor is arranged in the carbon source adding pool; the water inlet end of the denitrification filter is provided with an ammonia nitrogen concentration sensor, the water outlet end is provided with an ammonia nitrogen concentration sensor, a nitrite nitrogen concentration sensor and a nitrate nitrogen concentration sensor, and the water outlet pipe of the secondary sedimentation tank, the drainage pipe and the carbon source feeding pipe are provided with a flow monitor; the sensor and the flow monitor are connected with a PLC automatic control system; meanwhile, the PLC automatic control system is connected with the raw sewage drainage pump and the carbon source adding pump; when the whole system starts to operate, concentration data of each set sensor and flow data of a flow monitor are automatically collected and input to a PLC automatic control system, calculation is carried out through a set algorithm, then feedback signals are output to a drainage pump and a carbon source feeding pump according to a set regulation rule, and the water quality of the inflow water of the denitrification filter is regulated, so that the denitrification filter provides substrate ammonia nitrogen and nitrite nitrogen for anaerobic ammonia oxidizing bacteria on the premise that the outflow water reaches the standard.
Compared with the method for directly inoculating short-cut denitrification sludge and anaerobic ammonia oxidation sludge to transform the traditional nitrifying filter into the short-cut denitrification anaerobic ammonia oxidation filter, the method has the following advantages:
1) The short-range denitrification sludge and anaerobic ammoxidation sludge do not need to be inoculated, and the conversion cost of the filter tank is greatly reduced;
2) The substrate ammonia nitrogen and nitrite nitrogen are provided for the anaerobic ammonia oxidation bacteria in the denitrification filter by continuously regulating and controlling the water inlet condition, the anaerobic ammonia oxidation bacteria are slowly enriched in the local denitrification filter, the normal operation of a sewage treatment plant is not affected in the whole operation process, and the effluent is stable and reaches the standard;
3) The anaerobic ammonia oxidizing bacteria utilizes ammonia nitrogen to replace part of organic matters to reduce nitrite nitrogen, and compared with the traditional denitrification filter, the anaerobic ammonia oxidizing bacteria can reduce carbon source addition;
4) Part of the raw water is introduced into the mixing tank, so that the aeration quantity in the AO biochemical tank is reduced.
Description of the drawings:
FIG. 1 is a schematic diagram of the whole set of apparatus used in the method for enriching anaerobic ammonia oxidation bacteria in a denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge.
FIG. 2 is a diagram for regulating and controlling the concentration of ammonia nitrogen in water entering the denitrification filter;
FIG. 3 is a diagram for regulating and controlling the nitrite nitrogen concentration in effluent of the denitrification filter;
FIG. 4 is a graph for regulating and controlling the concentration of nitrate nitrogen in effluent of the denitrification filter.
In the figure 1, 1 is an original sewage tank, 2 is an AO biochemical tank, 3 is a secondary sedimentation tank, 4 is a carbon source adding tank, 5 is a mixing tank, 6 is a denitrification filter tank, 7 is a back flushing wastewater tank, 8 is a clean water tank, and 9 is a PLC automatic control system; 1.1 is an ammonia nitrogen concentration sensor, and 1.2 is a COD concentration sensor; 3.1 is a sludge reflux valve, and 3.2 is a nitrate nitrogen concentration sensor; 4.1 is a COD concentration sensor; 5.1 is a drainage pump, 5.2 is a carbon source adding pump, 5.3 is a stirrer, 5.4 is a secondary sedimentation tank effluent flow monitor, 5.5 is a drainage flow monitor, and 5.6 is a carbon source adding flow monitor; 6.1 is a denitrification filter water inlet pump, 6.2 is an ammonia nitrogen concentration sensor, 6.3 is a denitrification filter biomembrane filter material, 6.4 is an ammonia nitrogen concentration sensor, 6.5 is a nitrite nitrogen concentration sensor, and 6.6 is a nitrate nitrogen concentration sensor; 7 is a back flushing wastewater tank; 8 is a clean water tank; and 9 is a PLC automatic control system.
Detailed Description
For a better understanding of the technical content of the present invention, specific examples are provided below and the present invention is further described with reference to the accompanying drawings.
Example 1 method for enriching anaerobic ammonium oxidation bacteria in denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidation sludge
The raw sewage is denitrified from a raw sewage tank (1) through an AO biochemical tank (2), then enters a secondary sedimentation tank (3), sludge-water separation is carried out in the secondary sedimentation tank, part of precipitated sludge is discharged as surplus sludge, supernatant effluent of the secondary sedimentation tank enters a mixing tank (5), and part of sludge flows back to the AO biochemical tank through a sludge reflux pump (3.1); in addition, raw sewage is introduced into a raw water inlet mixing tank through a drainage pump (5.1); the carbon source adding pool (4) enters the mixing pool through a carbon source adding pump (5.2); the mixing pool is stirred to realize uniform mixing; the effluent of the mixing tank enters a denitrification filter (6) through a denitrification filter water inlet pump (6.1); the denitrification filter is filled with traditional activated sludge biomembrane filler, and the effluent of the denitrification filter flows to a back flushing wastewater tank (7) and a clean water tank (8).
S1: recording the effluent NO of the secondary sedimentation tank 3 - -N concentration of a, NH 4 + -N concentration b, flow Q1; raw sewage NH 4 + -N concentration c, COD concentration d, drainage flow Q2; the COD concentration of the carbon source adding pool is e, and the flow is Q3; water inlet NH of denitrification filter 4 + -N concentration f, initially f is set to 3mg/L; denitrifying filter pond effluent NH 4 + -N concentration is g, effluent NO 2 - The concentration of N is h, and the effluent NO 3 - -N concentration is i; q is the total flow of the original sewage;
s2: collecting NO in secondary sedimentation tank on line every 5min by using sensor 3 - -N concentration a and NH 4 + N concentration b, raw sewage NH 4 + The concentration c of N, the concentration d of COD and the concentration e of COD in the carbon adding tank can be directly measured, and the sensor is used for collecting NH of water in the denitrification filter tank every 5min on line 4 + -N concentration f and NH of effluent 4 + N concentration g, NO 2 - -N concentration h, NO 3 - The N concentration i is obtained by utilizing an online flow monitor, the secondary sedimentation tank effluent flow Q1, the primary sewage drainage flow Q2 and the carbon source adding flow Q3 are collected, and all data are transmitted to a PLC automatic control system for calculation.
The initial flow rates in the whole system are calculated as follows:
Q2＝(b+c-f)/c*Q
Q1＝Q-Q2
Q3＝(4a*Q1-f*Q-d*Q2)/e
when the whole system is started, Q2 is set to 0, COD concentration e in the carbon source adding pool is set to 150g/L, f is set to 3mg/L, and the regulation and control scheme after the system is started is as follows:
the ammonia nitrogen regulation mode of denitrification filter tank water inlet: if the NH of the effluent of the denitrification filter is monitored 4 + -N concentration g for 2 days less than 1mg/L; the PLC automatic control system transmits the adjusting signal to the drainage pump, so that the pump speed of the drainage pump is increased by 1% until f=f+2; otherwise stopping regulation and control, and keeping f unchanged;
the method for regulating the nitrite nitrogen in the effluent of the denitrification filter tank comprises the following steps: if the denitrification filter tank is discharged with NO 2 - The PLC automatic control system transmits an adjusting signal to the carbon source adding pump to enable the pump speed of the carbon source adding pump to be reduced by 1 percent, if h is more than 4mg/L, the PLC automatic control system transmits the adjusting signal to the carbon source adding pump to enable the pump speed of the carbon source adding pump to be increased by 1 percent, otherwise, the control is stopped, and h is kept unchanged;
the method for regulating the nitrate nitrogen in the effluent of the denitrification filter comprises the following steps: if the denitrification filter tank is discharged with NO 3 - And if the N concentration i is greater than 5mg/L, the PLC automatic control system transmits an adjusting signal to the carbon source adding pump, so that the pump speed of the carbon source adding pump is increased according to the proportion of 1%, otherwise, the regulation and control are stopped, and the i is kept unchanged.
The test results show that: according to the system for treating urban domestic sewage, anaerobic ammonia oxidation denitrification is observed in the denitrification filter under the premise that the effluent of the denitrification filter reaches the standard by a method for enriching anaerobic ammonia oxidation bacteria in the denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge, the denitrification amount accounts for 5-20% of the total nitrogen removal amount of the filter, and the effluent NO 3 - The concentration of the-N is 0.7-3.4mg/L, and the NH of the effluent is 4 + The concentration of the-N is 1.0-3.5mg/L, and the effluent NO 2 - The N concentration is 3.4-7.4mg/L. However, the denitrification filter operating in the conventional manner treats municipal domestic sewage, but no anaerobic ammonia oxidation denitrification effect is observed.
Example 2 method for enriching anaerobic ammonium oxidation bacteria in denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidation sludge
S1: recording the effluent NO of the secondary sedimentation tank 3 - -N concentration of a, NH 4 + -N concentration b, flow Q1; raw sewage NH 4 + -N concentration c, COD concentration d, drainage flow Q2; the COD concentration of the carbon source adding pool is e, and the flow is Q3; water inlet NH of denitrification filter 4 + -N concentration f, initially f is set to 3mg/L; denitrifying filter pond effluent NH 4 + -N concentration is g, effluent NO 2 - The concentration of N is h, and the effluent NO 3 - -N concentration is i; q is the total flow of the original sewage;
s2: collecting NO in secondary sedimentation tank on line every 5min by using sensor 3 - -N concentration a and NH 4 + N concentration b, raw sewage NH 4 + The concentration c of N, the concentration d of COD and the concentration e of COD in the carbon adding tank can be directly measured, and the sensor is used for collecting NH of water in the denitrification filter tank every 5min on line 4 + -N concentration f and NH of effluent 4 + N concentration g, NO 2 - -N concentration h, NO 3 - The N concentration i is obtained by utilizing an online flow monitor, the secondary sedimentation tank effluent flow Q1, the primary sewage drainage flow Q2 and the carbon source adding flow Q3 are collected, and all data are transmitted to a PLC automatic control system for calculation.
The initial flow rates in the whole system are calculated as follows:
Q2＝(b+c-f)/c*Q
Q1＝Q-Q2
Q3＝(4a*Q1-f*Q-d*Q2)/e
when the whole system is started, Q2 is set to 0, COD concentration e in the carbon source adding pool is set to 150g/L, f is set to 3mg/L, and the regulation and control scheme after the system is started is as follows:
the ammonia nitrogen regulation mode of denitrification filter tank water inlet: if the NH of the effluent of the denitrification filter is monitored 4 + -N concentration g for 2 days less than 1mg/L; the PLC automatic control system transmits the adjusting signal to the drainage pump, so that the pump speed of the drainage pump is increased by 1% until f=f+2; otherwise stopping regulation and control, and keeping f unchanged;
the method for regulating the nitrite nitrogen in the effluent of the denitrification filter tank comprises the following steps: if the denitrification filter tank is discharged with NO 2 - The PLC automatic control system transmits an adjusting signal to the carbon source adding pump to enable the pump speed of the carbon source adding pump to be reduced by 3 percent, if h is more than 4mg/L, the PLC automatic control system transmits the adjusting signal to the carbon source adding pump to enable the pump speed of the carbon source adding pump to be increased by 1 percent, otherwise, the control is stopped, and h is kept unchanged;
the method for regulating the nitrate nitrogen in the effluent of the denitrification filter comprises the following steps: if the denitrification filter tank is discharged with NO 3 - And if the N concentration i is greater than 5mg/L, the PLC automatic control system transmits an adjusting signal to the carbon source adding pump, so that the pump speed of the carbon source adding pump is increased according to the proportion of 3%, otherwise, the regulation and control are stopped, and the i is kept unchanged.
The test results show that: according to the system for treating urban domestic sewage, anaerobic ammonia oxidation denitrification is observed in the denitrification filter under the premise that the effluent of the denitrification filter reaches the standard by a method for enriching anaerobic ammonia oxidation bacteria in the denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge, the denitrification amount accounts for 5-18% of the total nitrogen removal amount of the filter, and the effluent NO 3 - The concentration of the-N is 0.8-3.0mg/L, and the NH of the effluent is 4 + The concentration of the-N is 1.0-3.2mg/L, and the effluent NO 2 - The N concentration is 3.4-6.6mg/L. But by usingThe denitrification filter operated in the traditional mode treats urban domestic sewage, but no anaerobic ammonia oxidation denitrification effect is observed.
The above embodiments are only examples of the present invention, and the present invention is not limited thereto, but any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. The method for enriching anaerobic ammonia oxidation bacteria by a denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge is characterized in that the device is provided with an urban sewage raw water tank (1), an AO biochemical tank (2), a secondary sedimentation tank (3), a carbon source adding tank (4), a mixing tank (5), a denitrification filter (6), a back flushing wastewater tank (7), a clean water tank (8) and a PLC automatic control system (9), and the method is characterized by comprising the following steps:
s1: inoculating activated sludge of a traditional sewage treatment plant to a denitrification biological filter to enable the activated sludge to be coated on a filter material; recording the effluent NO of the secondary sedimentation tank 3 - -N concentration of a, NH 4 + -N concentration b, flow Q1; raw sewage NH 4 + -N concentration c, COD concentration d, drainage flow Q2; the COD concentration of the carbon source adding pool is e, and the flow is Q3; water inlet NH of denitrification filter 4 + -N concentration is f; denitrifying filter pond effluent NH 4 + -N concentration is g, effluent NO 2 - The concentration of N is h, and the effluent NO 3 - -N concentration is i; q is the total flow of the original sewage;
s2: on-line collection of effluent NO of secondary sedimentation tank by using sensor 3 - -N concentration a and NH 4 + N concentration b, raw sewage NH 4 + N concentration c and COD concentration d, and COD concentration e of the carbon adding tank are directly measured, and a sensor is used for collecting NH of water in the denitrification filter tank on line 4 + -N concentration f and NH of effluent 4 + N concentration g, NO 2 - -N concentration h, NO 3 - The method comprises the steps of (1) collecting the water outlet flow Q1 of a secondary sedimentation tank, the drainage flow Q2 of raw sewage and the adding flow Q3 of a carbon source by using an online flow monitor;
the individual flows of the whole process are calculated as follows:
Q2＝(b+c-f)/c*Q
Q1＝Q-Q2
Q3＝(4a*Q1-f*Q-d*Q2)/e。
2. the method for enriching anaerobic ammonia oxidation bacteria in a denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge according to claim 1, wherein an ammonia nitrogen concentration sensor (1.1) and a COD concentration sensor (1.2) are arranged in the raw sewage water tank (1); a nitrate nitrogen concentration sensor (3.2) is arranged in the secondary sedimentation tank (3); a COD concentration sensor (4.1) is arranged in the carbon source adding pool (4); an ammonia nitrogen concentration sensor (6.2) is arranged at the water inlet end of the denitrification filter, and an ammonia nitrogen concentration sensor (6.4), a nitrite nitrogen sensor (6.5) and a nitrate nitrogen sensor (6.6) are arranged at the water outlet end.
3. The method for enriching anaerobic ammonia oxidation bacteria in a denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge according to claim 1, wherein the raw sewage tank (1) is connected with an AO biochemical tank (2); the original sewage tank is connected with the mixing tank (5) through a drainage pump (5.1), and the drainage pump is connected with a PLC control system (9); the outlet pipe of the AO biochemical tank is connected with a secondary sedimentation tank (3); the secondary sedimentation tank is connected with the AO biochemical tank through a sludge reflux pump (3.1); the secondary sedimentation tank is connected with the mixing tank (5) through a secondary sedimentation tank water outlet pipe; the carbon source adding pool is connected with the mixing pool (5) through a carbon source adding pump (5.2), and the mixing pool is provided with a stirrer (5.3); the water outlet pipe of the mixing tank is connected with a water inlet pump (6.1) of the denitrification filter; the denitrification filter (6) is filled with ceramsite filter materials (6.3) and traditional activated sludge.
4. The method for enriching anaerobic ammonium oxidation bacteria in the denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonium oxidation sludge according to claim 3, wherein the drainage pump (5.1), the carbon source feeding pipe and the secondary sedimentation tank water outlet pipe are respectively provided with flow monitors (5.5), (5.6) and (5.4).
5. The method for enriching anaerobic ammonium oxidation bacteria in a denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonium oxidation sludge according to claim 2 and 4, wherein the sensor or the flow detector is connected with a PLC control system.
6. The method for enriching anaerobic ammonia oxidation bacteria by a denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge according to claim 1, wherein the denitrification filter (6) is provided with a water outlet pipe which is simultaneously connected with a back flushing wastewater tank (7) and a clean water tank (8), and the back flushing wastewater tank (7) and the clean water tank (8) are respectively provided with a water outlet pipe.
7. The method for enriching anaerobic ammonium oxidation bacteria in the denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonium oxidation sludge according to claim 1, wherein all data measured by any sensor or detector in the step (2) are transmitted to a PLC automatic control system (9) for operation.
8. The method for enriching anaerobic ammonium oxidation bacteria in a denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonium oxidation sludge according to claim 1, wherein when the whole process is started, Q2 is set to 0, the COD concentration e in a carbon source adding tank is set to 130-150g/L, and f is set to 3-5mg/L.
9. The method for enriching anaerobic ammonium oxidation bacteria in a denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonium oxidation sludge according to claim 1, wherein the whole process comprises the following regulation scheme after starting:
the ammonia nitrogen regulation mode of denitrification filter tank water inlet: if the NH of the effluent of the denitrification filter is monitored 4 + The N concentration g lasts for 2 days and is smaller than 1mg/L, the PLC automatic control system transmits an adjusting signal to the drainage pump, so that the pump speed of the drainage pump is increased by 1% -3% until f=f+2; otherwise stopping regulation and control, and keeping f unchanged;
denitration processThe method for regulating the nitrite nitrogen in the water outlet of the chemical filter tank comprises the following steps: if the denitrification filter tank is discharged with NO 2 - The N concentration h is smaller than 2mg/L, and the PLC automatic control system transmits the adjusting signal to the carbon source adding pump, so that the pump speed of the carbon source adding pump is reduced according to the proportion of 1% -3%; if h is more than 4mg/L, the PLC automatic control system transmits an adjusting signal to the carbon source adding pump, so that the pump speed of the carbon source adding pump is increased by 1% -3%; otherwise stopping regulation and control, and maintaining h unchanged;
the method for regulating the nitrate nitrogen in the effluent of the denitrification filter comprises the following steps: if the denitrification filter tank is discharged with NO 3 - The N concentration i is larger than 5mg/L, the PLC automatic control system transmits the adjusting signal to the carbon source adding pump, so that the pump speed of the carbon source adding pump is increased according to the proportion of 1% -3%; otherwise, stopping regulation and control, and keeping i unchanged.
CN202310517267.7A 2023-05-09 2023-05-09 Method for enriching anaerobic ammonia oxidation bacteria in denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge Pending CN116282526A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310517267.7A CN116282526A (en) 2023-05-09 2023-05-09 Method for enriching anaerobic ammonia oxidation bacteria in denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310517267.7A CN116282526A (en) 2023-05-09 2023-05-09 Method for enriching anaerobic ammonia oxidation bacteria in denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge

Publications (1)

Publication Number Publication Date
CN116282526A true CN116282526A (en) 2023-06-23

Family

ID=86817039

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310517267.7A Pending CN116282526A (en) 2023-05-09 2023-05-09 Method for enriching anaerobic ammonia oxidation bacteria in denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge

Country Status (1)

Country Link
CN (1) CN116282526A (en)

Similar Documents

Publication Publication Date Title
KR102369453B1 (en) Method and apparatus for nitrogen removal in wastewater treatment
CN107162193B (en) Device and method for treating domestic sewage by low-oxygen nitrification coupled with short-range denitrification anaerobic ammonia oxidation
CN110002594B (en) Device and method for realizing shortcut nitrification-anaerobic ammonia oxidation based on hydroxylamine side inhibition
CN103058461B (en) Municipal sewage partial nitrification and anaerobic ammonia oxidation denitrification method capable of enhancing energy recuperation
CN101284697B (en) Device and method for realizing shortcut nitrification of sludge-digestion liquid by combined control of FA and FNA
CN109160670B (en) Denitrification method of municipal sewage denitrification filter based on short-cut denitrification and anaerobic ammonia oxidation
CN112607861B (en) Process for treating municipal sewage by using excess sludge fermentation carbon source to strengthen denitrification dephosphorization, partial short-cut denitrification and anaerobic ammonia oxidation
CN110078303B (en) Step feed A2Method and device for realizing shortcut nitrification/anaerobic ammonia oxidation in/O process
CN112850894A (en) Device and method for advanced denitrification of industrial wastewater through anaerobic ammonia oxidation
CN110342638B (en) Low-carbon-nitrogen-ratio sewage denitrification device and method based on double reflux and gradient oxygen limitation
CN212450841U (en) Enhanced denitrification system for treating low C/N municipal sewage continuous flow
CN114772725A (en) Device and method for enhancing nitrogen and phosphorus removal of domestic sewage by coupling sulfur autotrophic short-cut denitrification with anaerobic ammonia oxidation
CN110723816B (en) Method for realizing long-term stable operation of short-cut nitrification and anaerobic ammonia oxidation integrated treatment of municipal sewage
CN111661925A (en) Enhanced denitrification system and method for treating low C/N urban sewage continuous flow
CN106348444A (en) Method for quickly starting CANON nitrogen removal process
CN107879469A (en) A kind of partial nitrification starts and control method
CN107473382B (en) Biological treatment method for realizing simultaneous removal of carbon and nitrogen in sewage by controlling dissolved oxygen
CN111960538A (en) System and method for realizing stable operation of shortcut nitrification-anaerobic ammonia oxidation denitrification of low-ammonia nitrogen wastewater
CN113105078B (en) Method for coupling anaerobic ammonia oxidation with landfill leachate MBR biochemical system
CN107986443B (en) Whole-course autotrophic nitrogen removal method suitable for sewage with large COD/N fluctuation
CN203048739U (en) Urban wastewater partial nitrification and anaerobic ammonia oxidation denitrification device strengthening energy recovery
CN115477388A (en) Ammonium nitrate wastewater treatment device and method
CN116282526A (en) Method for enriching anaerobic ammonia oxidation bacteria in denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonia oxidation sludge
CN202099115U (en) Device for membrane bioreactor to achieve short-cut nitrification
CN205472940U (en) Sewage treatment plant through monitoring N2O automatic control

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination