Method for enriching anaerobic ammonium oxidation bacteria by utilizing tannery wastewater and activated sludge of biochemical system of tannery wastewater

An anaerobic ammonia oxidizing bacteria and biochemical system technology, applied in the field of sewage treatment, can solve the problems of high cost, harsh environmental requirements, long generation cycle, etc., and achieve the effects of strong impact resistance, reduced labor intensity, and high ammonia nitrogen content

Inactive Publication Date: 2020-09-18
CHAMBROAD CHEM IND RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the abundance of anammox bacteria in ordinary activated sludge is extremely low, and they grow slowly, have a long generation cycle, are sensitive to matrix components and concentrations, and have strict requirements on the environment, which lead to the use of ordinary activated sludge enrichment culture cycle Too long, and need to manually configure the medium to meet the growth requirements of the strains, the cost of strain enrichment culture is high
In addition, it is difficult to start the reactor when inoculated with ordinary activated sludge. Inoculation of activated sludge after enrichment culture is insufficient in provenance, expensive, and there are problems such as poor versatility of activated sludge enriched with different water quality, which leads to anaerobic ammonia The application of oxidation engineering is seriously limited

Method used

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  • Method for enriching anaerobic ammonium oxidation bacteria by utilizing tannery wastewater and activated sludge of biochemical system of tannery wastewater
  • Method for enriching anaerobic ammonium oxidation bacteria by utilizing tannery wastewater and activated sludge of biochemical system of tannery wastewater

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Embodiment 1

[0034] A method for enriching anammox bacteria by utilizing tannery wastewater and activated sludge of its biochemical system, the specific steps comprising:

[0035] Tannery A wastewater (ammonia nitrogen 1000-1200mg / L, COD 3000-3500mg / L) enters the flocculation sedimentation tank and then adds polyferric sulfate 0.8kg / m 3 , ferrous sulfate 1.5kg / m 3 , react for 20min, then add polyacrylamide 0.03kg / m 3 , react for 15min, finally add calcium oxide 3.2kg / m 3 , Precipitating suspended solids in raw water and ions toxic to microorganisms into physical sludge to complete wastewater pretreatment.

[0036]After pretreatment, the wastewater enters the anoxic pool. The process parameters of the anoxic pool are: temperature 25±2°C, pH 7.0-7.2, dissolved oxygen 0.2-0.3mg / L, residence time 20-24h, control effluent COD<1500mg / L Enter the aerobic pool; after entering the aerobic pool, the process parameters of the aerobic pool are: temperature 25±2°C, pH 7.5-7.8, dissolved oxygen 1.0±0...

Embodiment 2

[0040] A method for enriching anammox bacteria by utilizing tannery wastewater and activated sludge of its biochemical system, the specific steps comprising:

[0041] Tannery B wastewater (ammonia nitrogen 300-400mg / L, COD 800-1000mg / L) enters the flocculation sedimentation tank and then adds ferrous sulfate 0.3kg / m 3 , react for 20min, then add polyacrylamide 0.01kg / m 3 , react for 15min, finally add calcium oxide 1.1kg / m 3 , Precipitating suspended solids in raw water and ions toxic to microorganisms into physical sludge to complete wastewater pretreatment.

[0042] After pretreatment, the wastewater enters the anoxic pool. The process parameters of the anoxic pool are: temperature 30°C, pH 7.0-7.2, dissolved oxygen 0.2-0.3mg / L, residence time 12-14h, control effluent COD<500mg / L to enter Oxygen tank: After entering the aerobic tank, the process parameters of the aerobic tank are: temperature 30°C, pH 7.7-7.8, dissolved oxygen 1.5±0.1mg / L controlled by micro-aeration and p...

Embodiment 3

[0046] A method for enriching anammox bacteria by utilizing tannery wastewater and activated sludge of its biochemical system, the specific steps comprising:

[0047] Tannery C wastewater (ammonia nitrogen 500-550mg / L, COD 1500-1800mg / L) enters the flocculation sedimentation tank and then adds ferrous sulfate 0.4kg / m 3 , reacted for 20min, then added polyaluminum chloride 0.6kg / m 3 , react for 15min, add polyacrylamide 0.01kg / m 3 , react for 15min, finally add calcium oxide 2.8kg / m 3 , Precipitating suspended solids in raw water and ions toxic to microorganisms into physical sludge to complete wastewater pretreatment.

[0048] After pretreatment, the wastewater enters the anoxic pool. The process parameters of the anoxic pool are: temperature 30°C, pH 7.3-7.4, dissolved oxygen 0.2-0.3mg / L, residence time 18-20h, control effluent COD<700mg / L to enter Oxygen tank: After entering the aerobic tank, the process parameters of the aerobic tank are: temperature 30°C, pH 7.5-7.6, di...

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Abstract

The invention belongs to the technical field of sewage treatment. The invention particularly provides a method for enriching anaerobic ammonium oxidation bacteria by utilizing tannery wastewater and activated sludge of a biochemical system of the tannery wastewater. The tannery wastewater is pretreated by a physicochemical method and biologically treated by an anoxic tank-aeration tank, effluent is used as inlet water of an enrichment reactor, activated sludge of an anoxic tank and an aerobic tank of the biochemical system is mixed and used as inoculation sludge of the enrichment reactor, operating parameters of the enrichment reactor are controlled, and rapid enrichment of the anaerobic ammonia oxidizing bacteria is realized. On one hand, wastewater is used for replacing a manually prepared culture medium to provide nutrition for strains; on the other hand, the anaerobic ammonium oxidation bacteria enriched under the process are high in adaptability to the tannery wastewater and highin tolerance to harmful components of the tannery wastewater, the debugging period of later-period tannery wastewater anaerobic ammonium oxidation process denitrification industrial application is shortened, and the wastewater denitrification effect is guaranteed.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, and specifically provides a method for enriching anammox bacteria by utilizing tannery wastewater and activated sludge of a biochemical system. Background technique [0002] Tannery wastewater has the characteristics of strong toxicity, high ammonia-nitrogen, and low carbon-to-nitrogen ratio. The traditional nitrification-denitrification process requires a large amount of carbon source and soda ash, and the amount of aeration is large and energy consumption is high, resulting in sewage treatment costs. high. Anaerobic ammonia oxidation refers to the process of converting ammonia nitrogen into nitrogen gas with nitrite nitrogen as the electron acceptor under anaerobic conditions. It has the advantages of low source, low sludge yield, low energy consumption and aeration, which can greatly reduce the overall sewage operation cost, and is a new sewage treatment technology with great applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/24
CPCC02F3/30C02F3/28C02F3/02C02F1/56C02F1/5236C02F3/2846C02F3/284C02F2103/24
Inventor 马韵升杨传伦蔡颖辉车树刚孔凡衡王秀芝陈振发
Owner CHAMBROAD CHEM IND RES INST CO LTD
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