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A silicon industrial park wastewater treatment process and device

A technology for wastewater treatment and treatment process, which is applied in water/sewage treatment, water/sewage multi-stage treatment, biological water/sewage treatment, etc. It can solve the problems of difficult biochemical, high salt, and unsatisfactory denitrification process treatment effect. , to achieve the effect of efficient removal and ensure normal operation

Active Publication Date: 2021-10-29
安徽环境科技集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the silicon industrial park in the prior art, the mixed treatment of white carbon black wastewater and park comprehensive wastewater has high salt content and difficult biochemistry, while when the park comprehensive wastewater is treated separately, the ammonia nitrogen and total nitrogen in the park comprehensive wastewater are high, and the carbon-nitrogen ratio is low. The traditional denitrification process has unsatisfactory treatment effect and needs to add a large amount of carbon source for technical problems

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  • A silicon industrial park wastewater treatment process and device
  • A silicon industrial park wastewater treatment process and device
  • A silicon industrial park wastewater treatment process and device

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Experimental program
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Effect test

Embodiment 1

[0036] A kind of silicon industrial park wastewater treatment process of the present embodiment, such as Figure 6 As shown, the process includes park comprehensive wastewater treatment process and white carbon black wastewater treatment process.

[0037] The white carbon black wastewater treatment process includes two flow paths, the wastewater in the first flow path enters the sulfate dissimilation step for treatment, the sulfate in the waste water is converted into reduced sulfur by sulfate reducing bacteria, and after filtration, the reduced sulfur It is used in the comprehensive wastewater treatment process of the park, and the unconverted sulfate enters the second flow path; the second flow path wastewater treatment process includes the following steps: coagulation, sand rate, reverse osmosis and MVR evaporation, and the by-product sodium sulfate is produced . The return of the filtered sulfate in the first flow path is the reverse osmosis step. The by-product sodium s...

Embodiment 2

[0041] The dissimilation / denitrification device adopted in embodiment 1, such as Figure 1-5 As shown, the body of the device is cylindrical, the bottom is conical, and the conical bottom is convenient for the collection and discharge of sludge. The top of the device body is provided with an integrated wastewater inlet 11 and a motor 12 in the park.

[0042] A mounting seat 19 is provided at the bottom of the tapered device body, on which the sulfur adsorption module 2 is erected for easy disassembly and assembly, so as to clean and maintain the interior of the device body. The bottom plate of the sulfur adsorption module 2 and the bottom of the tapered device body form a mud collection chamber 20, the bottom plate of the sulfur adsorption module 2 is provided with holes, and the bottom plate of the sulfur adsorption module 2 can also be a plate-shaped sand filter structure. The sulfur adsorption module 2 includes a second fitting mechanism 13, and the second fitting mechanis...

Embodiment 3

[0046] The operating steps of the device described in embodiment 2 are as follows:

[0047] It operates in the form of periodic sequence batches. At the beginning of an operation cycle, there is no waste water residue in the device body. After the reaction starts, the effluent of the anaerobic reactor enters the device body from the silica waste water inlet 7, and the waste water contains more sulfides, which are leached to the sulfur adsorption module 2 by spraying, on which the second fitting mechanism 13 The loaded filler is "iron oxide + clinoptilolite" mixed filler mainly composed of iron oxide. After passing through the sulfur adsorption module 2, the waste water enters the nanofiltration device after being filtered by the sand filter at the bottom of the device body. The unadsorbed sulfide will be separated from sulfate and sulfide through nanofiltration, which not only avoids high-concentration sulfate from entering the biochemical system, but also provides a sulfur s...

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Abstract

The invention belongs to the technical field of sewage treatment, and relates to a silicon industrial park wastewater treatment process and device. For silicon industrial parks in the prior art, the mixed treatment of white carbon black wastewater and comprehensive wastewater in the park has high levels of salt and difficult biochemistry, and when the two types of wastewater are treated separately, ammonia nitrogen and total nitrogen in the comprehensive wastewater of the park are high, and the carbon-nitrogen ratio is low , the treatment effect of the traditional denitrification process is not ideal, and it is necessary to add a large amount of carbon source to the technical problem. This scheme provides a silicon industrial park wastewater treatment process. By taking out a small part of the wastewater bypass branch in the white carbon black wastewater, the sulfate in the white carbon black wastewater is converted into reduced sulfur, which is a sulfur autotrophic denitrification bacteria. The group provides a sulfur source, and realizes the removal of nitrogen pollution from wastewater with a low carbon-to-nitrogen ratio under the condition of no carbon source addition. This solution also provides a dissimilation / denitrification device, which can realize sulfur conversion and sulfur autotrophic denitrification reaction in the same device, and realize efficient treatment of two different types of wastewater, with compact rhythm, no transfer process, and efficient reaction .

Description

technical field [0001] The invention belongs to the technical field of sewage treatment in industrial parks, and in particular relates to a process and device for treating wastewater in silicon industrial parks. Background technique [0002] The industrial base of the silicon industrial park is quartz stone finishing business, and white carbon black is an important silicon-based raw material. White carbon black production enterprises mainly use the sulfuric acid precipitation method to produce white carbon black, that is, to use sodium hydroxide as raw material, acidify with sulfuric acid to generate silicic acid, and then decompose to obtain precipitated silica. The main characteristics of the wastewater produced by this process are as follows: Contains a higher concentration of SiO 2 and sulfates. In addition to white carbon black wastewater, the wastewater treatment plant in the silicon industrial park also needs to treat the comprehensive wastewater in the park. The wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F1/001C02F1/041C02F1/441C02F1/442C02F1/52C02F1/5281C02F3/30C02F3/345C02F9/00
Inventor 孔殿超方降龙张强董献彬崔杜军张勋张青吕冰倩
Owner 安徽环境科技集团股份有限公司
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