Anaerobic active sludge process

An activated sludge, sequencing batch technology, applied in the direction of aerobic and anaerobic process treatment, can solve the problems of difficult biochemical advantages, the potential of Methanothrix cannot be fully utilized, and unstable ecosystems.

Inactive Publication Date: 2008-07-02
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the perspective of microbial ecology, batch fermentation is carried out in ASBR. With the continuous transfer of initial substrates to intermediate products, the composition of methane bacteria and dominant bacteria in the reactor are also constantly replaced, forming an unstable ecosystem. , making it difficult for Methanosarcina and Methanotrichum to give full play to their respective biochemical advantages: On the one hand, the methanogens in ASBR are mostly Methanothrix, in order to maintain the balance between acidogenic bacteria and methanogenic bacteria, Its organic load is generally ≯8.0g / L d, sacrificing the function of high substrate utilization rate of Methanosarcina; on the other hand, the granular sludge in ASBR is composed of hydrolytic bacteria, acid-producing bacteria and methanogenic bacteria The mixed flora and the alternation of the dominant flora make the potential of Methanothrix to the substrate conversion reaction not be fully utilized

Method used

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  • Anaerobic active sludge process

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0025] Inoculation sludge is inoculated with digested sludge from urban sewage treatment plants.

[0026] The reactor in section A operates at medium temperature (30-35°C); the adsorption time is 10-15 minutes; the biogas (biogas) produced by itself is used for intermittent stirring; the reactor in section A is maintained at a high concentration of acetic acid, and the organic load of the influent is about 5.0~ 7.5g / L·d; trace metal elements have an activation effect on Methanosarcina bacteria, the trace elements Fe, Co, Ni are directly added to the reactor, and the dosage of trace elements is: Fe adopts 1mg / L·d ; Co adopts 0.1mg / L·d; Ni adopts 0.2mg / L·d. The ratio of reactor height to diameter is 5.

[0027] The B-stage reactor operates at medium temperature (30-35°C); the biodegradation time is 6h-8h; the biogas (biogas) generated by the A-stage reaction is used for intermittent stirring; the load of the B-stage reactor is kept below 5g / L·d, Make it run at low acetic acid ...

Embodiment approach 2

[0029] Inoculation sludge is inoculated with digested sludge from urban sewage treatment plants.

[0030] The reactor in section A operates at medium temperature (30-35°C); the adsorption time is 10-20 minutes; the biogas (biogas) produced by itself is used for intermittent stirring; the reactor in section A is maintained at a high concentration of acetic acid, and the organic load of the influent is 7.5~ Between 10.0g / L·d; trace metal elements have an activation effect on Methanosarcina bacteria, and the trace elements Fe, Co, Ni are directly added to the reactor, and the trace element dosage is: Fe adopts 1mg / L d; 0.1 mg / L d for Co; 0.2 mg / L d for Ni. The ratio of reactor height to diameter is 6.

[0031] The B-stage reactor operates at medium temperature (30-35°C); the biodegradation time is 8h-12h; the biogas (methane) generated by the A-stage reaction is used for intermittent stirring; the load of the B-stage reactor is kept below 5g / L·d, Make it run at low acetic acid ...

Embodiment approach 3

[0033] Inoculation sludge is inoculated with digested sludge from urban sewage treatment plants.

[0034] The reactor in section A operates at medium temperature (30-35°C); the adsorption time is 15-30 minutes; the biogas (biogas) produced by itself is used for intermittent stirring; the reactor in section A is maintained at a high concentration of acetic acid, and the organic load of the influent is 10.0~ Between 12.0g / L·d; trace metal elements have an activation effect on Methanosarcina bacteria, and the trace elements Fe, Co, and Ni are directly added to the reactor, and the trace element dosage is: Fe is 1mg / L d; 0.1 mg / L d for Co; 0.2 mg / L d for Ni. The ratio of reactor height to diameter is 5.5.

[0035] The B-stage reactor operates at medium temperature (30-35°C); the biodegradation time is 12h-24h; the biogas (biogas) generated by the A-stage reaction is used for intermittent stirring; the load of the B-stage reactor is kept below 5g / L·d, Make it run at low acetic ac...

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Abstract

The anaerobic sequencing batch active sludge process belongs to the field of environment protecting and waste water treating technology. The present invention features the two-stage serially contained anaerobic sequencing batch reactor (ASBR) for optimizing methane bacteria colony, the separate adsorption in the reactor A and biodegradation in the reactor B, and the application of the technological process for treating medium and high concentration insoluble organic waste water. Compared with traditional ASBR, the present invention has 10-30 % raised organic load, 10-20 % reduced power consumption and 10 % raised organic matter eliminating rate.

Description

technical field [0001] The invention discloses an anaerobic sequencing batch activated sludge process, which belongs to the technical field of environmental protection and waste water treatment. Specifically, two-stage anaerobic sequencing batch reactor Anaerobic Sequencing BatchReactor-ASBR is used in series to optimize the methane flora, and the A-stage reactor and B-stage reactor are used to complete the adsorption process and biodegradation reaction respectively. To treat medium and high concentration non-dissolved organic wastewater. technical background [0002] Anaerobic sequencing batch reactor ASBR is a high-efficiency anaerobic reactor developed by Professor Dague in the United States in the early 1990s. It has the advantages of high-efficiency and stable kinetics, and is simple in structure, flexible in operation, easy to operate, and strong in adaptability. However, from the perspective of microbial ecology, batch fermentation is carried out in ASBR. With the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
Inventor 李亚新岳秀萍
Owner TAIYUAN UNIV OF TECH
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