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Method and device for removing nitrogen and phosphorus in immobilized phycomycete coupling membrane separation process

A separation process, denitrification and phosphorus removal technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, osmosis/dialysis water/sewage treatment, etc. Increase the efficiency of COD and nitrogen and phosphorus removal, improve the nitrification capacity, and simplify the operation.

Inactive Publication Date: 2008-09-10
SHENZHEN UNIV +1
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Problems solved by technology

However, since most of these researchers put activated sludge and algal cells in the same device for cultivation, the significant differences between algal cells and bacteria in terms of growth conditions, culture environment and nutritional requirements make the operation of the entire treatment process more difficult. It is difficult to achieve industrialization, and the co-cultivation of algae and bacteria is not conducive to the discharge of excess sludge, which is not conducive to phosphorus removal

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  • Method and device for removing nitrogen and phosphorus in immobilized phycomycete coupling membrane separation process

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Embodiment 1

[0028] A method for immobilizing deoxyphosphorus in the process of coupling membrane separation of algae and bacteria, the steps are as follows:

[0029] A. Domestic sewage is treated by anaerobic digestion and aerobic aeration to remove most of COD and part of nitrogen and phosphorus. Slow stirring is provided in the anaerobic tank, and the stirring speed is 15-45r / min, depending on the specific situation; aerobic tank Bottom aeration, the amount of aeration is adjusted by the level of dissolved oxygen in the sewage in the aerobic tank, and the level of dissolved oxygen is maintained at 2-4mg / L. A soft filler is set in the aerobic tank for the sludge to attach and grow. The soft filler is polypropylene fiber filament material, which is evenly suspended in the aerobic tank.

[0030] B. The domestic sewage after aerobic and anaerobic treatment in step A enters the membrane separation device, the sewage treated by anaerobic and aerobic treatment is filtered by the membrane sepa...

Embodiment 2

[0035]According to Fig. 1, it can be seen that the device comprises anaerobic tank 1, aerobic tank 2, membrane separation tank 3, immobilized algae cell fluidized beds 4a, 4b, and is characterized in that: anaerobic tank 1 passes pipeline and lift pump 5a, respectively 5b, the aerobic tank 2 is connected, and a motor 6 is installed outside the anaerobic tank 1. The raw water is pumped into the anaerobic tank 1 through the sewage lifting pumps 5a and 5b for oxygen digestion, and the stirring motor 6 provides slow stirring for the anaerobic tank 1. The sludge is evenly mixed; the submersible sewage pump 9 is connected to the anaerobic tank 1 and the membrane separation tank 3 through pipelines to return the sludge and concentrated water, and the air storage tank 8 is connected to the air compressor 7 and the aerobic tank 2 through pipelines , the membrane separation tank 3 is respectively connected with the aerobic tank 2 and the extraction pumps 11a and 11b through pipelines, th...

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Abstract

The invention discloses a denitriding and dephosphorizing method in the course of immobilized phycomycete coupling membrane separation and a device to carry out the same. The method comprises the following steps of: firstly, COD, nitrogen and phosphor in sewage are treated through anaerobic digestion and aerobic aeration, then the sewage enters a membrane separation device, sludge are stopped and condensed water reflows to anaerobic and aerobic slots, and finally water through a membrane component enters the immobilized algae cell treating device and is discharged after nitrogen and phosphor are further removed. The invention comprises a device consisting of an anaerobic slot, an aerobic slot, a membrane separation slot and an immobilized algae cell fluidized bed. The method is simple, the device is stable in operation, and the operation cost is lost, high in COD and nitrogen and phosphor removing efficiency, can be widely used for urban living and industry sewage treatment with obvious economic, environmental and social benefits.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and more specifically relates to a method for denitrification and dephosphorization of immobilized algal bacteria coupling membrane separation process, and also relates to a device for denitrification and dephosphorization, which is mainly used for COD and COD of urban domestic sewage and industrial sewage. Nitrogen and phosphorus removal. Background technique [0002] The intensification of environmental pollution and water eutrophication has forced more and more countries and regions to formulate strict nitrogen and phosphorus discharge standards, which has also made sewage nitrogen and phosphorus removal technology a hot spot and difficulty in the field of sewage treatment. China's existing sewage treatment process has long focused on the reduction of carbon source pollutants, ignoring the removal of nitrogen and phosphorus, the main nutrients that lead to eutrophication of water bodi...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F9/02C02F1/44
Inventor 邓旭刘京胡章立游勇雷安平杜飞艳
Owner SHENZHEN UNIV
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