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Sewage treatment process and device capable of achieving surface IV-class water discharge

A sewage treatment device and sewage treatment technology, applied in water/sewage treatment, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc., to achieve the effect of reducing pollution, reducing cleaning cycle, and maintaining adsorption capacity

Pending Publication Date: 2020-03-24
JIANGSU JIUWU HITECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The technology of the sewage treatment system can solve the technical problems of standard upgrading and transformation of traditional sewage plants

Method used

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  • Sewage treatment process and device capable of achieving surface IV-class water discharge
  • Sewage treatment process and device capable of achieving surface IV-class water discharge

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Embodiment 1

[0078] The waste water to be treated in the present invention mainly comes from the secondary biochemical effluent of the paper mill, and its indicators are generally COD120mg / L, pH about 7.8, total phosphorus (TP) about 12mg / L, and total nitrogen about 15mg / L.

[0079] The steps taken include:

[0080] Step 1: Add a flocculant mixed with polyaluminum chloride and polyaluminum ferric chloride in a weight ratio of 2:1 to the effluent from the secondary biochemical treatment. The amount of flocculant added is 75ppm; at the same time, 15ppm of coagulant cations are added Non-toxic polyacrylamide is used for flocculation treatment, and the water produced by flocculation is successively settled by inclined plate and coarsely filtered;

[0081] Step 2: The clear liquid obtained in step 1 enters the denitrification biofilter for denitrification treatment to remove nitrate nitrogen in the sewage; wherein, the average diameter of the filler used in the denitrification biofilter is 5~6m...

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Abstract

Belonging to the field of water treatment, the invention discloses a sewage treatment process capable of achieving surface IV-class water discharge. The process includes: step 1, carrying out dosing coagulating sedimentation, coarse filtration and other pretreatment processes on two-stage biochemical treatment effluent water to remove large-particle suspended matters and TP; step 2, enabling the clear liquid obtained in step 1 to enter a denitrification biological filter tank for denitrification treatment so as to remove nitrate nitrogen in the sewage; and step 3, enabling the effluent water of the denitrification biological filter tank in step 2 to enter an O3-powdered activated carbon (PAC)-flat ceramic membrane system to remove COD, NH3-N, SS and bacterial microorganisms, and performingup-to-standard discharge on the filtered effluent water. The process provided by the invention adopts coagulation sedimentation, denitrification biofilter and O3-PAC-flat plate ceramic membrane treatment and other technologies to carry out advanced treatment on conventional sewage biochemical treatment effluent water, can be applied to upgrading and reconstruction of municipal sewage or industrial sewage and the like, and finally reaches discharge to surface IV-class water after sewage plant upgrading and reconstruction.

Description

technical field [0001] The invention relates to a sewage treatment system capable of discharging Class IV water on the surface, in particular to a technology that integrates various processes such as chemical precipitation, biological oxidation, ozone oxidation, activated carbon adsorption, and membrane separation to treat traditional biochemical waste water. The tail water process belongs to the field of waste water treatment. Background technique [0002] At present, more stringent local discharge standards have been introduced in various places. The traditional sewage treatment process can no longer meet the continuously improving drainage standards. Therefore, the traditional sewage treatment plants are facing standard upgrading and transformation, and the treatment water quality and effect are superior and the operation is more stable. Demand for new technologies and processes. Traditional sewage treatment processes mainly include A2O, MBR, SBR, and BAF, and these si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16
CPCC02F9/00C02F2001/007C02F1/44C02F1/78C02F2305/02C02F1/5236C02F1/56C02F1/283C02F3/28C02F2305/06C02F2301/08C02F2101/16
Inventor 彭文博罗小勇吴正雷陈道康范克银党建兵
Owner JIANGSU JIUWU HITECH
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