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Phototrophic enhanced biological system and biological nitrogen and phosphorus removal method

A biological denitrification and culture solution technology, applied in the field of sewage treatment, can solve the problems of residence time limited nitrification, low sedimentation characteristics, and does not allow the growth of nitrifying bacterial communities, so as to reduce operating costs, carbon emissions, and oxygen content Effect of reduction in demand, aeration costs

Active Publication Date: 2022-02-18
BEIJING LONGTAO ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it often exhibits low settling properties and the low hydraulics and sludge residence times applied do not allow the growth of nitrifying bacterial communities
In addition, short sludge residence time limits nitrification in wastewater with low C / N ratio

Method used

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  • Phototrophic enhanced biological system and biological nitrogen and phosphorus removal method
  • Phototrophic enhanced biological system and biological nitrogen and phosphorus removal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 A kind of phototrophic enhanced biological system

[0026] It includes a regulating tank, a reactor, a sludge tank, and a clear water tank 3 connected by pipelines. The reactor includes a control system, a halogen lamp, an aerator, and an agitator arranged in the reactor shell. In vitro circulating water pump, fan, culture solution dosing tank, argon gas source.

Embodiment 2

[0027] Embodiment 2 biological nitrogen and phosphorus removal method

[0028] S1.EBPR stage: pass the wastewater and culture solution I in the adjustment tank into the reactor 4, and set an anaerobic-aerobic period in the reactor under dark conditions, and the wastewater is stirred in the reactor for 7 hours, and then left to stand for 1 hour , and pass into argon; wherein, the treatment time in the anaerobic period is 3h, and the aeration time in the aerobic period is 4h;

[0029] S2. EBPR to the expired stage of phototrophic EBPR: the culture solution I is passed into the reactor, and the anaerobic-aerobic period is set in the reactor, the anaerobic period operates under dark conditions, and the aerobic period operates under light conditions The waste water was stirred and treated in the reactor for 7 hours, then allowed to stand for 1 hour, and argon gas was introduced; the treatment time in the anaerobic period was 3 hours, the treatment time in the aerobic period was 4 h...

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Abstract

The invention relates to the technical field of sewage treatment, in particular to a phototrophic enhanced biological system and a biological nitrogen and phosphorus removal method, the phototrophic enhanced biological system comprises an adjusting tank, a reactor, a sludge tank and a clean water tank which are connected through pipelines, and wastewater in the reactor is discharged after passing through an EBPR stage, an expiration stage from EBPR to phototrophic EBPR, a phototrophic EBPR stage, a transition stage from phototrophic EBPR to phototrophic BNR and a phototrophic BNR stage. According to the phototrophic enhanced biological system and the biological nitrogen and phosphorus removal method provided by the invention, illumination conditions, aeration conditions and stirring conditions are set and alternately carried out, after passing through an EBPR stage, an expiration stage from EBPR to phototrophic EBPR, a phototrophic EBPR stage, a transition stage from phototrophic EBPR to phototrophic BNR and a phototrophic BNR stage, and multiple internal circulation is carried out in each stage, proper aerobic, anoxic and anaerobic environments are created, the synergistic effect of microalgae-bacterial consortia is enhanced, the aeration requirement of biological nutrient substance removal can be eliminated, external COD dosing is not needed, the operation cost is low, and the method is environment-friendly.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a phototrophic enhanced biological system and a biological nitrogen and phosphorus removal method. Background technique [0002] With industrial expansion and population growth, intensive agricultural activities have excessively applied chemical fertilizers, releasing excess nitrogen (N) and / or phosphorus (P) into the aquatic environment. Eutrophication breaks the balance of the aquatic ecosystem and aggravates the pollution of environmental water bodies. According to the regulations issued by the State Environmental Protection Administration, most of the sewage treatment plants are currently facing upgrading and transformation of existing processes to meet the requirements of the state. [0003] Usually in the activated sludge process, carbon absorption and phosphorus release occur in the anaerobic section; heterotrophic denitrification and phosphorus absorption occur ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F1/66C02F1/30
CPCC02F3/301C02F3/302C02F1/66C02F1/30Y02W10/10
Inventor 王馨悦杨阳骆坚平郭行潘涛
Owner BEIJING LONGTAO ENVIRONMENTAL TECH CO LTD
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