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Treating method and micro flocculation reactor for reusing washing sewage

A treatment method and technology of sewage circulation, applied in the directions of water/sewage multi-stage treatment, water/sludge/sewage treatment, osmosis/dialysis water/sewage treatment, etc., can solve complex process, low water recovery rate, sludge Large volume and other problems, to achieve the effect of saving water resources, high recovery rate, less sludge

Inactive Publication Date: 2006-09-13
BEIJING JIAOTONG UNIV
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  • Description
  • Claims
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Problems solved by technology

[0006] Aiming at the problems and deficiencies existing in the existing washing sewage treatment technology, such as complex process flow, many equipments, high energy consumption, low water recovery rate, large amount of sludge, special sludge treatment and micro-flocculation reactor, the present invention Provide a treatment method and micro-flocculation reactor for the recycling and reuse of washing sewage

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  • Treating method and micro flocculation reactor for reusing washing sewage
  • Treating method and micro flocculation reactor for reusing washing sewage

Examples

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Embodiment 1

[0019] Example 1: The treated water volume is 1m 3 / h: Collect the washing sewage discharged from the washing machine into the regulating water tank, and use the filter installed in the regulating water tank to intercept the lint and other sundries in the washing sewage; add the coagulation agent to the suction port of the water pump in front of the micro-flocculation reactor After the polyaluminum chloride 40mg / L, it enters the microflocculation reactor to react for 25s, so that the fine suspended solids, organic matter, grease, etc. in the water form microflocs; after microflocculation, it is filtered through an ultrafiltration membrane with a molecular weight cut-off of 100,000Da The polypropylene PP hollow fiber membrane, under the membrane pressure of 0.1MPa, the microflocs and bacteria in the water are almost completely intercepted by the surface of the membrane, 75% of the free anionic surfactant in the water penetrates the membrane pores, and the filtered The water is conn...

Embodiment 2

[0021] Example 2: The treated water volume is 5m 3 / h: Collect the washing sewage discharged from the washing machine into the regulating water tank, and use the filter installed in the regulating water tank to intercept the lint and other sundries in the washing sewage; add the coagulation agent to the suction port of the water pump in front of the micro-flocculation reactor After aluminum sulfate 80mg / L, it enters the micro-flocculation reactor to react for 15s to make small suspended solids, organic matter, grease, etc. in the water form micro-flocs; after micro-flocculation, it is filtered through an ultrafiltration membrane, which uses a polymer with a molecular weight cut-off of 50,000 Da Acrylonitrile PAN hollow fiber membrane, under the membrane pressure of 0.15MPa, the microflocs and bacteria in the water are almost completely intercepted by the surface of the membrane, 70% of the free anionic surfactant in the water penetrates the membrane pores, and the filtered water C...

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Abstract

The present invention discloses one kind of treating method and micro flocculation reactor for reusing washing sewage. Washing sewage is collecting in regulating water tank and has its flock intercepted with the filtering net inside the tank; the washing sewage is then reacted with coagulating chemical in the micro flocculation reactor for some time and filtered in the ultrafiltering system at low pressure of 0.05-0.2 MPa; and the filtered water is collected for reuse in the next washing process. The micro flocculation reactor is one snake-shaped pipe, the ultrafiltering membrane is reverse flushed regularly, and the reverse flushed waste water is deposited inside the reverse flush waste water tank, with the supernatant being returned into the regulating water tank. The treating method is simple, high in water recovering rate and low in power consumption, and is suitable for use in where washing amount is relatively great and household.

Description

Technical field [0001] The invention relates to a treatment method for recycling and reuse of washing sewage and a microflocculation reactor, in particular to a method for processing washing sewage to obtain recyclable water by using a microflocculation-ultrafiltration combined process and a microflocculation method Flocculation reactor. Background technique [0002] The main pollutants in washing sewage are anionic surfactant LAS, grease FOG and suspended solids TSS. At present, the traditional washing sewage treatment method takes the anionic surfactant LAS in the sewage as the main treatment target, adopts the coagulation-air flotation-filtration process, the secondary biological treatment method, or the micro-flocculation-filtration-ultrafiltration process to achieve Strict requirements for LAS in national discharge and reclaimed water quality standards. [0003] These technological processes are complicated, with many equipment and large area. Among them, the best dosage of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F1/44C02F1/52B01D39/08
Inventor 王锦石磊杨成永许兆义
Owner BEIJING JIAOTONG UNIV
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