Vibrating flat plate ceramic membrane bioreactor technology for enhancing phosphorus removal, and sewage treatment system

A technology of membrane bioreactor and ceramic membrane, which is applied in biological water/sewage treatment, water/sewage treatment, multi-stage water/sewage treatment, etc., can solve the problem of not being able to meet the municipal sewage phosphorus discharge standard and having no phosphorus pollutant treatment procedures , can not effectively alleviate membrane fouling and other problems, and achieve the effect of excellent thermal stability and pore stability, small footprint, and not easy to clog

Inactive Publication Date: 2017-12-26
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No treatment program for phosphorus pollutants in municipal wastewater
Since phosphorus in sewage is mainly dissolved in water as phosphate, membrane separation technology alone cannot meet the municipal sewage phosphorus discharge standard
The backwash system used in this invention cannot effectively remove the hydrophobic substances (such as proteins and polysaccharides) that have blocked the membrane pores, so it cannot effectively alleviate membrane fouling and prolong the membrane service life

Method used

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  • Vibrating flat plate ceramic membrane bioreactor technology for enhancing phosphorus removal, and sewage treatment system
  • Vibrating flat plate ceramic membrane bioreactor technology for enhancing phosphorus removal, and sewage treatment system
  • Vibrating flat plate ceramic membrane bioreactor technology for enhancing phosphorus removal, and sewage treatment system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A sewage treatment system for a vibration plate ceramic membrane bioreactor process that strengthens phosphorus removal, including: a coagulation tank, a membrane bioreactor and a vibration device,

[0035] Among them, there is a fast agitator in the coagulation tank;

[0036] The coagulation tank and the membrane bioreactor are connected through the pumping pipeline and the raw water pump. There is an aeration head at the bottom of the aerobic reactor, which is connected to the external air flow meter and air pump in turn through the air pipeline;

[0037] The flat ceramic membrane is fixed on one end of the metal frame and submerged vertically in the aerobic reactor, and is connected with the suction pressure gauge and suction pump outside the reactor in turn through the suction pipeline, and the vibration motor is fixed on the other end of the metal frame and is located in the aerobic reactor. above the device.

[0038] Unless otherwise specified, after the various...

Embodiment 2

[0040] A kind of vibrating plate ceramic membrane bioreactor process that adopts the sewage treatment system described in embodiment 1 to strengthen dephosphorization, comprises:

[0041] (1) Sewage continuously enters the coagulation mixing tank through the raw water pump (I) to mix with the flocculant, and the hydraulic retention time of the coagulation mixing tank is 1 to 2 minutes. The flocculant preferably chooses iron salt, aluminum salt and other compounds that are easy to precipitate with phosphate. Through rapid stirring (preferably rotating speed>200RPM), the pollutants in the sewage and the flocculant produce flocs. Among them, orthophosphate and flocculant form coprecipitate, which changes from dissolved state to precipitated state.

[0042] (2) The mixed solution enters the aerobic membrane bioreactor through the raw water pump. The reactor is inoculated with activated sludge and supplied with oxygen through an air pump. A flat ceramic membrane is submerged in ...

Embodiment 3

[0044] Embodiment 3: compare the removal efficiency of pollutants under different doses of coagulants

[0045] Adopt the scheme of embodiment 2, coagulant uses ferric chloride, dosage increases from small to large, is respectively 0,10,15,20mg-Fe / L. Each dosage condition was run for 20 days to ensure that the reactor reached a steady state. Firstly, the raw water pump (I) pumps the municipal sewage into the coagulation tank and mixes it with the coagulant ferric chloride. The average organic matter concentration of sewage is 360mg-COD / L, and the average total phosphorus concentration is 6.35mg / L. The stirring speed in the coagulation tank is 200rpm, and the hydraulic retention time is 2min. At the same time, the raw water pump (II) pumps the mixed solution from the coagulation tank into the membrane bioreactor (8L) at a flow rate of 16L / d. Activated sludge (4.12g / L) was inoculated in the membrane bioreactor, the hydraulic retention time was 12h, and the sludge retention tim...

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Abstract

The invention is mainly applied to the technical field of municipal sewage treatment, and mainly relates to a vibrating flat plate ceramic membrane bioreactor technology for enhancing phosphorus removal, and a sewage treatment system and treatment method. The technology has excellent effects of sewage treatment and phosphorus removal. A membrane has the characteristics of long period of use, high anti-corrosion capability, good thermal stability, good stability of holes and the like. The device system involved by the technology has the advantages of small land occupation area, simple operation, high purification ability and wide application scope, and is suitable for various scales of sewage treatment systems.

Description

technical field [0001] The invention is mainly applied in the technical field of municipal sewage treatment, and mainly relates to a vibrating plate ceramic membrane bioreactor process for strengthening phosphorus removal, a sewage treatment system and a treatment method thereof. Background technique [0002] With the development of society, the society's requirements for sewage treatment technology continue to increase. Among various technologies, the membrane bioreactor can achieve good and stable effluent quality, save floor space and reduce labor costs. At present, the membranes used in municipal sewage treatment mainly use organic membranes. Its materials include Nylon, PES, MCE, CA, PTFE, PVDF, GF, PP. Although the membrane bioreactor has an excellent effect on solid-liquid separation, its removal effect on dissolved pollutants, such as phosphorus, is poor. [0003] In addition, although the price of the organic membrane is low, its service life is short, its corros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14B01D65/02C02F101/10
CPCB01D65/02B01D2321/2058C02F1/5236C02F3/1268C02F2101/105
Inventor 李晓岩李若泓李炳郭学超
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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