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MBR purification method and system of domestic grey water

A purification system, gray water technology, applied in chemical instruments and methods, biological water/sewage treatment, sustainable biological treatment, etc., can solve problems without any research and application

Inactive Publication Date: 2011-11-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Combining high-efficiency coagulation and clarification pretreatment with MBR to treat domestic gray water can give full play to the advantages of each other, which not only reduces the impact of LAS on subsequent membrane materials, eliminates foam, but also improves the operation stability of MBR to achieve excellent effluent water quality. The combination of efficient and rapid clarification technology and MBR applied to the advanced treatment and regeneration of domestic gray water has not yet had any research and application

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  • MBR purification method and system of domestic grey water
  • MBR purification method and system of domestic grey water
  • MBR purification method and system of domestic grey water

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Effect test

Embodiment 1

[0057] Embodiment 1, domestic gray water MBR purification system

[0058] The domestic gray water MBR purification system in the present embodiment is made up of preprocessor 1 and membrane bioreactor (MBR reactor) 2, and is connected by pipeline 125 between preprocessor 1 and membrane bioreactor 2, and specific composition sees figure 1 As shown, the domestic gray water MBR purification system in this embodiment can be used for advanced treatment and reuse of gray water.

[0059] Among them, the preprocessor 1 includes a coagulation reaction zone 11 and a high-efficiency clarification zone 12 .

[0060] The coagulation reaction zone 11 is divided into a dosing and mixing section 111 and a reaction curing section 112 by incomplete partitions 117 . One side (inlet end) of the coagulation reaction zone 11 is provided with a water inlet pipe 113, a coagulant injection pipe 114 and a return sludge pipe 131; -300r / min), the reaction maturing section 112 is provided with a low-spe...

Embodiment 2

[0068] Embodiment 2, the MBR purification process of domestic gray water

[0069] The domestic gray water in this embodiment comes from all miscellaneous gray waters such as bathing, laundry and kitchen of a certain building, and the NH of water 3 -N is 20~35mg / L, COD Cr 200-350mg / l, LAS 6.2-31.5mg / L, TP 3-8mg / L, SS 140-300mg / L.

[0070] The purification process is as follows:

[0071]After the domestic gray water is collected, it enters the dosing mixing section 111 of the preprocessor 1 through the water inlet pipe 113. This section is provided with a coagulant filling pipe 114 and a mixing paddle 115, where the gray water is mixed with the coagulant (this implementation The coagulant in the example is polyaluminium, and the dosing concentration is 30mg / L), return sludge (the amount of return sludge is 3%~5% of water inflow) mixed, and the mixing paddle 115 stirs rapidly to promote the agent, sewage Mud and water are fully mixed and reacted to form flocs.

[0072] The fu...

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Abstract

The invention belongs to the technical field of environmental protection, in particular to an MBR purification method and a system of domestic grey water. The MBR purification method of the domestic grey water comprises two steps: coagulate clarification preprocessing and membrane biological reaction processing. The MBR purification method couples the high-efficiency preprocessing of grey water with low pollution and a membrane bioreactor in the same processing system and has low processing difficulty, little investment cost, small occupied area, easy realization of automatic running and simple management. After being processed, the domestic grey water has favorable water quality stability, can be used as fresh water and is used for water closet flushing, subdistrict greening, vehicle washing or industrial production and the like. In the processing process, the system can automatically run and has outstanding adaptability and impact resistance of the water quality and the water quantity.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a domestic gray water MBR purification method and system. Background technique [0002] Domestic gray water comes from various bathing, washing and kitchen wastewater in the family. The water volume accounts for 70-75% of all domestic sewage, and the pollutants only account for about 20% of domestic sewage. Detergents (mainly anionic detergents, LAS) , suspended matter and a small amount of organic pollutants, and the concentration of nitrogen and phosphorus is about 80% lower than that of ordinary domestic sewage. Domestic gray water is collected on-site for advanced treatment and directly reused for flushing toilets and greening. Not only is the processing difficulty and cost low, but it also contains almost no pathogenic bacteria. , so as to save energy and resource consumption. The research on the collection and treatment of domestic gray water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/52C02F3/12C02F1/44
CPCY02W10/10
Inventor 陈洪斌唐贤春何群彪董滨屈计宁
Owner TONGJI UNIV