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Chemical waste water processing method

A technology for chemical wastewater and processes, applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Produce highly toxic by-products and other problems to achieve effective treatment, reduce chroma, and reduce COD

Inactive Publication Date: 2016-01-20
ANQING FENGYUAN CHEM
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  • Abstract
  • Description
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Problems solved by technology

However, the methods mentioned above have disadvantages
The disadvantages of biological anaerobic treatment and its combination technology are harsh reaction conditions, complex device design and maintenance, and long anaerobic sludge domestication process before the formal device operation; the disadvantages of chemical oxidation treatment and its combination technology are high cost of chemicals, Prone to produce highly toxic by-products

Method used

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Embodiment Construction

[0015] A process for treating chemical wastewater, comprising the following steps, S1 injecting high COD wastewater into an electrolytic cell;

[0016] S2 introduces the wastewater after electrolysis into the neutralization flocculation tank, and simultaneously adds PAC as polyaluminum chloride and PAM as polyacrylamide;

[0017] S3 combined catalytic oxidation; S2 is used after the reaction is over, and the catalytic oxidation uses FeSO4 as the catalyst, H2O2 and ozone as the oxidizing agent; a catalytic oxidation reaction;

[0018] After S4 reacts in S3, there is flocculation and precipitation in the pool, and then add PAC to react as polyaluminum chloride and PAM as polyacrylamide;

[0019] S5 After the reaction of S4 is added to the biochemical reaction tank, and the condensate is added to the biochemical reaction tank for aerobic biological treatment; the volume ratio of the condensate to the evaporated residual concentrate is 8-9.

[0020] S6 discharges the evaporated r...

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Abstract

The invention discloses a chemical waste water processing method. The chemical waste water processing method comprises following steps: S1, high COD waste water is injected into an electrolytic tank; S2, after electrolysis, waste water is delivered into a neutralization flocculation tank, and polymeric aluminium (PAC) and polyacrylamide (PAM) are added at the same time; S3, catalytic oxidation is carried out, wherein after reaction in S2, FeSO4 is taken as a catalyst, H2O2 and ozone are taken as oxidizing agents for catalytic oxidation; S4, after reaction in S3, a flocculent precipitate is obtained in the tank, and PAC and PAM are added again for reaction; S5, after reaction in S4, an obtained product is delivered into a biochemical reaction basin, and a condensate is also added into the biochemical reaction basin for aerobic biological treatment; and S6, a concentrated solution residue is discharged from a multi-effect reduced pressure evaporation device via evaporation, and is subjected to incineration disposal. The chemical waste water processing method is capable of avoiding insufficient of the prior art; and biological treatment is adopted after pretreatment of waste water so as to realize effective processing of waste water.

Description

technical field [0001] The invention relates to the technical field of chemical wastewater treatment, in particular to a process for chemical wastewater treatment. Background technique [0002] With the technological innovation and rapid development of the industry, more and more wastewater has the characteristics of refractory biodegradability and high COD. For example, the COD of wastewater produced by the chemical industry can be as high as tens of thousands or even hundreds of thousands of milligrams per liter. The traditional activated sludge method has been unable to directly treat these wastewater. At present, the methods for treating high COD wastewater mainly include: 1) biological anaerobic treatment and its combination technology, for example, upflow anaerobic sludge bed (UASB), anaerobic-aerobic combined technology (A / O), Anoxic-anaerobic-aerobic combined technology (A2O), etc.; 2) Chemical oxidation treatment and its combined technology, for example, electroly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 黄帆
Owner ANQING FENGYUAN CHEM
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