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Aerobic-anoxic integration AO membrane bioreactor

A membrane bioreactor, an integrated technology, applied in the direction of aerobic and anaerobic process treatment, food industry wastewater treatment, etc., can solve the problems of large floor area, complicated operation, high operating cost, etc., and achieve small floor space, Simplify the process and achieve good results

Active Publication Date: 2017-05-31
HENAN INST OF ENG
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above situation, in order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide an aerobic-anoxic integrated AO membrane bioreactor, which can effectively solve the reflux of nitrifying liquid in the existing AO process, and occupies a large area. Complex operation and high operating costs

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Examples

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Embodiment example 1

[0016] Implementation Case 1: Apply the process of the present invention to treat potato starch production wastewater. In this implementation case, the main operating parameters of the integrated AO membrane bioreactor are: the concentration of the mixed liquid suspended sludge is 3000~4000mg / L, the hydraulic retention time is 8h, the sludge age is 30~40d, and the dissolved sludge in the reactor The oxygen concentration is 4~6mg / L. The influent of the biochemical reactor is pretreated potato starch production wastewater, the main water quality indicators: COD concentration is 700~1500mg / L, pH is 7.5~8.5, TN (total nitrogen concentration) is 180~200mg / L, TP (total phosphorus concentration) is 16.8~19.4mg / L. Technological conditions: The whole system is in the state of continuous water inlet and outlet, and the volume load is 1.2-1.5kgBOD5 / (m 3 . d), the treated water volume is 5~8m 3 , covers an area of ​​2m 2 . The water quality indicators after treatment are: COD 60~80m...

Embodiment example 2

[0017] Implementation Case 2: Applying the process of the present invention to treat astaxanthin production wastewater. In this implementation case, the main operating parameters of the integrated AO membrane bioreactor: the concentration of suspended sludge in the mixed liquid is 6000mg / L, the hydraulic retention time is 6h, the sludge retention time is 30d, and the dissolved oxygen concentration in the reactor is 4 ~6mg / L. The influent of the biochemical reactor is the pretreated astaxanthin production wastewater. The main water quality indicators are: the COD concentration is 1700~2000mg / L, the pH value is about 6.5~7.5, and the TN concentration is 200~250mg / L. The concentration of TP is 18.2~24.7mg / L. Technological conditions: The whole system is in the state of continuous water inlet and outlet, and the volume load is 0.8-1.0kgBOD5 / (m 3 d), the treatment water volume is 30~50m 3 / d, covers an area of ​​about 20m 2 . The effluent quality indicators after treatment are...

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Abstract

The invention relates to an aerobic-anoxic integration AO membrane bioreactor and aims to effectively solve the problems of backflow of nitrification liquor in the existing AO process, large occupied space, complicated operation and high operation cost. According to the technical scheme, a sludge area is arranged at the bottom of a shell; a shell inner cavity above the sludge area is divided into an aerobic area, a flow guide area and an anoxic precipitation area which are successively arranged along a horizontal direction; the bottoms of the aerobic area, the flow guide area and the anoxic precipitation area are communicated with the upper part of the sludge area; an aeration pipe is arranged in the aerobic area; an overflowing opening is formed in the upper part of a first partition plate between the aerobic area and the flow guide area; a ceramic membrane component is arranged in the anoxic precipitation area; a water discharging pipeline stretching out of the shell is mounted on the ceramic membrane component. Through the aerobic-anoxic integration AO membrane bioreactor, the aerobic-anoxic integration can be achieved; the occupied area is small; returning devices do not need to be additionally arranged; the process is simplified; the stable and up-to-standard emission of the wastewater can be achieved; the aerobic-anoxic integration AO membrane bioreactor is convenient to use and excellent in effect, and has significant social and economic benefits.

Description

technical field [0001] The invention relates to wastewater treatment equipment using biotechnology and membrane separation technology, in particular to an aerobic-anoxic integrated AO membrane bioreactor, which is suitable for treating urban domestic sewage, industrial wastewater and special wastewater containing biodegradable organic matter. Background technique [0002] MBR, also known as Membrane Bio-Reactor (Membrane Bio-Reactor), is a new type of water treatment technology that combines a membrane separation unit with a biological treatment unit. It is widely used in sewage treatment, water resource recycling and other fields. Membrane bioreactor replaces the secondary settling tank in traditional biological wastewater treatment technology with membrane modules, and uses membrane separation equipment to intercept activated sludge and macromolecular organic matter in water. A high sludge concentration can be maintained in the bioreactor, and the concentration of activate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F103/32
CPCC02F3/30C02F2103/32Y02W10/10
Inventor 鲍锦磊马培刘碧波范晓远张通姗陈忠艳孙新乐
Owner HENAN INST OF ENG
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