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Technique for reusing sewage

A process and sewage technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc., can solve the problems of high sand and activated carbon replacement frequency, complicated operation and maintenance process, Consuming manpower and material resources, etc., to achieve the effect of small footprint, low sludge output, and reduction of secondary pollution

Inactive Publication Date: 2008-02-20
TORAY FIBER RES INST(CHINA) CO LTD +2
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Problems solved by technology

During the operation, the replacement frequency of sand and activated carbon is high; the operation and maintenance process is relatively complicated, requiring a large number of specialized talents, thus consuming a lot of manpower and material resources

Method used

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  • Technique for reusing sewage
  • Technique for reusing sewage

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Experimental program
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Embodiment example

[0021] Implementation case: referring to Fig. 2, the experimental treatment capacity of the present invention is 2m 3 / h design; the total volume of anaerobic pool, anoxic pool and aerobic pool is 12m 3 ;MBR pool volume 5m 3 ; RO processing capacity 2m 3 / h; hydraulic retention time HRT = 6h. The processing conditions are shown in Table 1. Except for the pollutants listed in Table 1, other pollution indicators all meet the "Drinking Water Hygienic Standard" (GB5749-85).

[0022] Table 1 Influent and effluent water quality in the test

[0023]

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Abstract

The invention relates to a novel technique to apply membrance technique in sewage treatment, which is applied to waste water treatment and reuse field in environment engineering. The invention is characterized in that: firstly, the waste water is pretreated, then passes through anaerobic / anoxic / oxic (A / A / O) treatment sections, and then biologically decomposed and mud-water separated are carried out through a membrance biological reactor (MBR), and the waste water is disinfected after passing through a revere osmosis (RO) system. The invention has higher denitrification and phophrous removal effect with a total denitrificatin ratio as high as 99 percent and a total phophrous removal ratio as high as 99.5 percent. The final discharged waste water after the treatment can meet the Health Standard for Domestic Drinking Water of China (GB5749-85); the sludge concentration in a biological reaction tank is as high as 15-20g / l. The sludge production of the invention is low, the technical process of the invention is simple and is suitable for being PLC controlled; a secondary sedimentation tank is not needed in the system, and the occupying area is small.

Description

technical field [0001] The invention relates to a new technology for applying membrane technology to sewage treatment, which is suitable for the field of sewage treatment and reuse in environmental engineering. Background technique [0002] Our country is short of water resources. my country's per capita water resources are less than 2,200 cubic meters, only 1 / 4 of the world's average level; the per capita water resources in northern China are only 990 cubic meters, less than 1 / 8 of the world's average. It is predicted that my country's population will reach a peak of 1.6 billion around 2030. With full consideration of water conservation, it is estimated that the total water consumption will be 700 billion to 800 billion cubic meters at that time, and the actual amount of water resources that may be used in the country is about 8000. billion to 900 billion cubic meters, the further development of water resources is extremely difficult. [0003] The potential for wastewater ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F1/44C02F1/50
Inventor 杨德立杨瑜芳北中敦黄霞曹斌
Owner TORAY FIBER RES INST(CHINA) CO LTD
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