Treating method and micro flocculation reactor for reusing washing sewage

A treatment method and sewage recycling technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, osmotic/dialysis water/sewage treatment, etc. It can save water resources, high recovery rate and less sludge.

Inactive Publication Date: 2005-09-28
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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Embodiment 1

[0019] Embodiment 1: the amount of treated water is 1m3 / h: the washing sewage discharged from the washing machine is collected into the regulating water tank, and the filter screen installed in the regulating water tank is used to intercept the flocs and other sundries in the washing sewage; before the microflocculation reactor After adding 40mg / L coagulant polyaluminum chloride to the suction port of the water pump, it enters the micro-flocculation reactor for 25s to make fine suspended solids, organic matter, grease, etc. in the water form micro-floc; The filter membrane adopts a polypropylene PP hollow fiber membrane with a molecular weight cut-off of 100,000Da. Under the operating pressure of 0.1MPa, microflocs and bacteria in the water are almost completely intercepted on the surface of the membrane, and 75% of the free anionic surfactant in the water Through the membrane holes, the filtered water is connected to the high-level recycling water tank, and the recycled water ...

Embodiment 2

[0021] Embodiment 2: the amount of treated water 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 flocs and other sundries in the washing sewage; add coagulant agent to the water pump suction port in front of the microflocculation reactor After the aluminum sulfate is 80mg / L, it enters the micro-flocculation reactor to react for 15s, so that the fine suspended matter, organic matter, oil, etc. in the water form micro-floc; Acrylonitrile PAN hollow fiber membrane, under the operating pressure of 0.15MPa, microflocs and bacteria in the water are almost completely trapped by the surface of the membrane, 70% of the free anionic surfactants in the water pass through the membrane pores, and the filtered water It is connected to the high-level recycling water tank, and the recycled water can flow into the washing machine from the high-level water tank; ...

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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 present invention relates to a treatment method and a microflocculation reactor for washing sewage recycling, in particular to a method for treating washing sewage using a microflocculation-ultrafiltration combined process to obtain recyclable water and a microflocculation reactor for microflocculation. flocculation reactor. Background technique [0002] The main pollutants in washing wastewater are anionic surfactant LAS, oil FOG and suspended solids TSS. At present, the traditional washing sewage treatment method takes the anionic surfactant LAS in sewage as the main treatment target, adopts coagulation-air flotation-filtration process, secondary biological treatment method, or micro-flocculation-filtration-ultrafiltration process to achieve Strict requirements for LAS in national discharge and reclaimed water quality standards. [0003] These technological processes are complex, with many equipments and occupy a large area. Among them, the co...

Claims

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Application Information

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