Technology for processing wastewater with high contents of zinc, ammonia nitrogen, and thiourea

A technology for treatment process and wastewater treatment, applied in water/sewage treatment, heating water/sewage treatment, degassed water/sewage treatment, etc. Convenience and energy saving effect

Active Publication Date: 2019-09-20
四川恒泰环境技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a high-zinc, high-ammonia-nitrogen, and high-thiourea wastewater treatment process to solve the problems of high energy consumption and high cost of the existing treatment process

Method used

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  • Technology for processing wastewater with high contents of zinc, ammonia nitrogen, and thiourea

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Embodiment

[0043] Coating wastewater, ammonia spray absorption wastewater and glass drilling wastewater produced by a solar thin film battery production project. The main pollutants of coating wastewater and ammonia spray absorption wastewater are zinc ions, ammonia nitrogen, and thiourea, and the volume of coating wastewater is 69m 3 / d, the amount of wastewater absorbed by ammonia spraying is 1.06m 3 / d; glass drilling waste water volume is 720m 3 / d.

[0044] After the coating wastewater is mixed with ammonia spray and absorption wastewater, the concentration of main pollutants is: zinc ion 13080mg / L, ammonia nitrogen concentration 21858mg / L, thiourea 45672mg / L.

[0045] After being treated by the zinc removal unit, the concentration of zinc ions in the wastewater drops to about 20mg / L, and then enters the positive pressure ammonia distillation system 1 for a primary ammonia distillation treatment. The waste water and steam perform mass and heat transfer in the positive pressure amm...

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Abstract

The invention discloses a technology for processing wastewater with high contents of zinc, ammonia nitrogen, and thiourea, and belongs to the field of wastewater processing. The technology mainly comprises five processing processes: zinc removal, ammonia nitrogen removal, thiourea removal, biochemical treatment, and deep flocculation and sedimentation. First three steps are used to remove zinc, ammonia nitrogen and thiourea; thiourea is oxidized and decomposed; the biochemical treatment is carried out to remove organic substances in wastewater, residual ammonia nitrogen, total nitrogen, and COD are further removed in the biochemical treatment; then in the deep flocculation and sedimentation step, fine suspensions are removed, qualified residual wastewater is discharged, and whole processing is finished. The provided technology is used to process wastewater with high contents of zinc, ammonia nitrogen, and thiourea; the zinc ions of the wastewater are removed, the energy consumption is reduced; the byproducts are recovered; the technology meets the environment protection requirements and generates good economic benefits, and sustainable development is realized.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a treatment process for solar battery industrial wastewater, and in particular to a treatment process for high-zinc, high-ammonia-nitrogen, and high-thiourea wastewater. Background technique [0002] In recent years, my country's photovoltaic industry has developed rapidly. The new generation of thin-film solar cells has become a new investment hotspot in the domestic photovoltaic field due to its low production cost, low pollution, non-fading, good low-light performance, and high photoelectric conversion efficiency. During the production of thin-film solar cells, wastewater containing a large amount of metal zinc, ammonia nitrogen, and macromolecular organic compounds will be generated. The traditional treatment method mainly adopts a single treatment method, such as precipitation method, ion exchange method, membrane separation method, biological method and adsorption method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F11/12C02F101/20C02F101/16C02F101/30
CPCC02F9/00C02F11/12C02F1/02C02F2001/007C02F1/66C02F1/56C02F1/20C02F1/722C02F1/725C02F1/78C02F1/58C02F3/30C02F2101/20C02F2101/16C02F2101/40
Inventor 蒲柳杨红梅肖德龙黄莉姚铭李江唐俊赵燕冀雨彤张亚明
Owner 四川恒泰环境技术有限责任公司
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