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Method for direct filtration of municipal wastewater with plate ceramic membrane

A ceramic membrane and flat plate technology, applied in the field of environmental sewage treatment, can solve the problems of long recovery period, long initial start-up time, and difficulty in achieving stable water output, so as to reduce the concentration of organic matter and phosphorus, reduce the membrane fouling rate, and shorten the hydraulic pressure. The effect of dwell time

Inactive Publication Date: 2017-11-17
李晓岩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anaerobic biofilter described in this patent takes a long time to start up for the first time, has high requirements on temperature, is sensitive to the influence of poisons, and has a long recovery period after being damaged, while the subsequent ceramic membrane bioreactor will be affected by the initial annoyance. Oxygen biofilter has a greater impact and it is difficult to achieve stable water output

Method used

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  • Method for direct filtration of municipal wastewater with plate ceramic membrane
  • Method for direct filtration of municipal wastewater with plate ceramic membrane
  • Method for direct filtration of municipal wastewater with plate ceramic membrane

Examples

Experimental program
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Embodiment 1

[0034] refer to figure 1, the present invention provides a kind of municipal waste water pretreatment system, it is characterized in that, it comprises inlet pump (1), feed pump (2), coagulation reaction tank (3), ceramic membrane reaction tank (4), suction pump (5), backwash tank (6) and backwash pump (7); Ceramic membrane reactor comprises intake pump (8); Inlet pump (1) is connected with the water inlet of coagulation reaction tank (3) by pipeline, enters The drug pump (2) is connected to the drug inlet of the coagulation reaction tank (3) through a pipeline, and the water outlet of the coagulation reaction tank (3) enters the ceramic membrane reaction tank (4) through the pipeline under the action of gravity, and the ceramic membrane reaction tank (4) An aeration strip is installed at the bottom, the aeration strip is connected with the intake pump (8), the water outlet of the ceramic membrane is connected with the water pump (5), and the outlet of the ceramic membrane rea...

Embodiment 2

[0036] refer to figure 1 , on the basis of Example 1, when the ceramic membrane needs to be cleaned after being polluted, chemical reagents are added to the backwash pool (6), and then the ceramic membrane is backwashed, and the outlet of the backwash pool (6) is connected to the backwash tank (6) through a pipeline. Rinse the pump (7), import the cleaning solution into the ceramic membrane reaction tank, and continue the filtration process with the cleaned ceramic membrane.

[0037] On the basis of Example 1, the polluted ceramic membrane can efficiently remove membrane fouling and restore the original state of the membrane through low-pressure on-line / off-line backwashing.

Embodiment 3

[0039] A kind of flat ceramic membrane using a kind of municipal wastewater pretreatment system of embodiment 2 directly filters the treatment method of municipal wastewater comprising:

[0040] (1) Municipal wastewater enters the first pool, and the coagulant ferric chloride or polyaluminium chloride is added under the action of quick stirring. After adding the coagulant, the coagulant suspension flows into the second pool. In this way, the coagulation process can be realized, and the destabilization and settlement of suspended particles and organic pollutants can be promoted.

[0041] (2) The coagulation suspension flows into the second tank, and the coagulation suspension is filtered through a flat ceramic membrane to obtain purified water, wherein the second tank is provided with a flat ceramic membrane and a gas inlet, and the gas inlet is on the flat plate The bottom of the ceramic membrane reaction tank is aerated with a strip-shaped aeration strip, and the aeration str...

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Abstract

Belonging to the technical field of environmental sewage treatment, the invention in particular relates to a method for direct filtration of municipal wastewater with a plate ceramic membrane. The method includes the three processes of: 1) performing coagulation to promote the destabilization settlement of suspended particles and organic pollutants; 2) letting a coagulated suspension flow into a plate ceramic membrane reactor, and conducting low pressure filtering to obtain purified effluent water; and 3) performing online / offline backwash process to control membrane pollution. The method provided by the invention can effectively reduce the concentration of organic matters and phosphorus in water and reduce the membrane pollution rate.

Description

technical field [0001] The invention belongs to the technical field of environmental sewage treatment, in particular to a method for directly filtering municipal wastewater with a flat ceramic membrane. Background technique [0002] In the traditional municipal wastewater treatment process, the sedimentation tank is a common primary treatment process for removing particulate matter and particulate organic matter in water. After primary treatment, the wastewater enters the follow-up bioreactor for secondary biological treatment. The secondary treatment mainly removes the Organic pollutants in colloidal and dissolved forms. [0003] The traditional sedimentation tank pretreatment process for municipal wastewater has a long hydraulic retention time (about 2 hours) and a low removal rate for organic matter and phosphorus. Higher concentrations of organic matter and phosphorus are not effectively removed in the primary treatment stage, and thus enter the subsequent secondary bio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/06B01D65/02C02F9/04
CPCB01D65/02B01D2321/04B01D2321/168B01D2321/18C02F1/44C02F1/5245
Inventor 李晓岩赵艳侠
Owner 李晓岩
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