Method for advanced treatment and reuse of wastewater

A technology for advanced treatment and sewage, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. It can solve the problems of short service life, easy clogging of membrane modules, and low water production. Achieve the effect of highlighting technological progress, low operating cost, and high water production rate

CN103172216AInactive Publication Date: 2013-06-26XINJIANG ENVIRONMENTAL ENG TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2013-06-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for advanced treatment and reuse of wastewater. The method is characterized in that a biochemical device adopting a biological aerated filter comprises a water inlet pipe, a backwashing water inlet pipe, a backwashing air inlet pipe, an aerator pipe, a backwashing drain pipe, a water outlet pipe, water distributors, supporting fillers, ceramic fillers, a cell body and a filter plate, wherein energy consumption is only 60% of that of a contact oxidation method after secondary wastewater is subjected to biochemical treatment in the biological aerated filter and organic pollutants are removed; a separation device of an ultrafiltration pressing film comprises a biological aerated filter water discharging tank, a lift pump, a safety filter, ultrafiltration films, an ultrafiltration water production pipe and an ultrafiltration concentrated water pipe, wherein the ultrafiltration films can be used for intercepting matters with molecular weights of 3*10000-1*10000 and removing most colloidal silicon and organic matters in the water; and an electric-absorption desalting device comprises an ultrafiltration device water discharging tank, a water supply pump, a filtering device, an electro-adsorption module, a water production pipe, a reuse water tank, a regenerative pump and a regenerative water outlet, wherein raw water lifted by the regenerative pump is flushed by a short-circuited and standing module so as to regenerate an electrode, and a pollution discharge process is a backwashing process of the module.
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Description

technical field

[0001] The invention relates to advanced sewage treatment technology, and is especially suitable for replenishment of recycled circulating water for advanced sewage treatment. By utilizing the linkage technology of biological aerated filter, ultrafiltration membrane and electric adsorption, the method realizes the purpose of sewage reuse. Background technique

[0002] At present, the "biological aerated filter (BAF) + reverse osmosis (RO)" process is basically used for industrial high-end reuse water. RO is reverse osmosis technology, which is the opposite process of natural osmosis after applying pressure to the concentrated solution at the junction of the semi-permeable membrane. The semi-permeable membrane separates the pure water from the salt water, and the water molecules will pass through the membrane from the pure water side to the salt water side, so that the liquid level on the salt water side rises to a certain height, when the penetration reaches ...

Examples

Embodiment

[0024] The technology of "biological aerated filter + ultrafiltration + electro-adsorption" is adopted, and the steps are as follows;

[0025] 1) Biochemical disposal of biological aerated filter

[0026] Its device structure: the filter plate 11 of the ceramic filter material 9 and the supporting packing 8 is arranged in the pool body 10 from top to bottom, and the filter plate 11 is evenly distributed with the water distributor 7; the ceramic filter material 9 and the supporting packing The aeration pipe 4 is arranged in the interlayer of 8; the backwash water inlet pipe 2 connected to the water inlet pipe 1 is arranged on the water inlet side of the lower part of the filter plate 11, and the backwash air inlet pipe 3 is installed on the other side; the ceramic filter material 9 is filled The upper layer, that is, the side of the water outlet on the pool body 10 is equipped with a backwash drain pipe 5 and a water outlet pipe 6;

[0027] During operation, open the pipe valv...