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Sewage treatment system

A sewage treatment system and water tank technology, applied in water/sewage multi-stage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of high solid content at the inlet of hollow fiber membranes and the efficiency of membrane unit components Not high, reducing the filtration efficiency of membrane unit components, etc., to improve the overall efficiency and alleviate membrane fouling

Inactive Publication Date: 2012-07-18
BEIJING MINE WASTE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the sewage treatment system using separate membrane bioreactors, due to the one-way circulation of the feed liquid, the solid content at the inlet of the hollow fiber membrane will be high, and aggregates will easily form, which will block the entrance or inner cavity of the hollow fiber ultrafiltration membrane. When the membrane unit components in the membrane bioreactor operate under these conditions, since the feed liquid cannot enter the clogged fibers, the filtration efficiency of the membrane unit components is greatly reduced, resulting in unbalanced pollution of the entire membrane filaments. The overall efficiency of the membrane unit module is not high

Method used

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Embodiment 1

[0024] This embodiment provides a sewage treatment system, which can be used to treat sewage with separate membrane bioreactors, such as figure 1 As shown, the system includes:

[0025] Bioreactor 7, circulation pump 8, multiple valves 1, 2, 3, 4, pipelines, membrane unit 9 and purified water tank 10; wherein, the membrane unit 9 in the split membrane bioreactor is set separately, and internal Press-type hollow fiber membrane module, so that the membrane unit module can be operated independently to facilitate replacement and cleaning;

[0026] The water outlet of the bioreactor 7 is connected to the forward port of the membrane unit 9 through the pipeline, the circulation pump 8 and the first valve 1, and the reverse port of the membrane unit 9 is connected to the reverse port through the pipeline, the third valve 3 and the return port. Water pipe is connected to the water return port of described bioreactor 7; It is connected to the water return port of the bioreactor 7 thr...

Embodiment 2

[0039] The embodiment of the present invention provides a sewage treatment system. The structure of the system is basically the same as that of the sewage treatment system given in Example 1. The difference is that in this system, the pipeline connected to the water outlet of the bioreactor 7 It is connected to the gas supply equipment 16 through the intake pipeline 15; the pipeline connected to the permeate outlet of the membrane unit 9 is connected to the gas supply equipment 16 through another intake pipeline 17, realizing the water inlet and backwashing system in the membrane unit. Added double air punch means in the middle. During operation, the gas supply equipment 16 introduces the intake air through the two intake pipes 15 and 17 to realize the intermittent air flushing technology, and realizes the gas-water mixed backwashing of the membrane components in the membrane unit during the cleaning process, which can solve the problem of active pollution. The mud composition...

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Abstract

The invention discloses a sewage treatment system and belongs to the field of sewage treatment. The system comprises a bioreactor, a circulating pump, a plurality of valves, a pipeline, a membrane unit and a purification water tank, wherein the water outlet of the bioreactor is connected to the positive opening of the membrane unit through the pipeline, the circulating pump and a first valve; thereverse opening of the membrane unit is connected to the water return port of the bioreactor through the pipeline, a third valve and a return pipe; the water outlet of the circulating pump is connected to the reverse opening of the membrane unit through the pipeline and a second valve; the positive opening of the membrane unit is connected to the water return port of the bioreactor through the pipeline, a fourth valve and the return pipe; and the permeate outlet of the membrane unit is connected with the purification water tank through the pipeline. In the system, the sludge in the bioreactorcan enter the membrane unit by switching directions so as to realize the self-cleaning of the membrane unit, alleviate membrane pollution and improve the treatment efficiency of the membrane unit.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a sewage treatment system. Background technique [0002] At present, membrane bioreactor (Membrane Bioreactor, referred to as MBR) is recognized as an advanced sewage treatment and sewage recycling technology in the world today. It combines ultrafiltration, microfiltration or nanofiltration membrane components in membrane separation technology with sewage biological treatment. A new treatment system formed by the combination of bioreactors in the bioreactor. This integrated combined new process integrates the biodegradation of the bioreactor and the high-efficiency separation technology of the membrane. Due to the high-efficiency separation of membranes, MBR has many outstanding advantages that traditional biological treatment processes do not have: such as excellent and stable effluent quality, which can be directly reused; high volume load, small footprint, and compact process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/00C02F1/44
Inventor 牛晋辉孟洪
Owner BEIJING MINE WASTE TECH