Electroplating waste water high-efficiency combined biochemical treatment technique
A technology for electroplating wastewater and biochemical treatment, which is applied in the fields of metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve the problems of complex wastewater components, no treatment methods, and many electroplating processes.
Active Publication Date: 2012-10-24
浙江平湖绿色环保技术发展有限公司
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[0002] Since the new standard of "Electroplating Pollutant Discharge Standard" GB 21900-2008 was promulgated and implemented, the original traditional wastewater treatment facilities of many enterprises in the electroplating industry can no longer meet the requirements of the new standard, and they are all exploring and looking for cost-effective treatment methods
Electroplating wastewater has many electroplating processes and complex wastewater components. In addition to various heavy metal pollution indicators, there are also organic pollutants COD and nutritional indicators NH 3 -N, total nitrogen, total phosphorus and other indicators, currently many electroplating companies have no effective treatment methods for this
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[0014] Such as figure 1 As shown, the high-efficiency combined biochemical treatment technology for electroplating wastewater. After the heavy metal ion wastewater is degraded in the high-efficiency biochemical combined pool, it is separated from the mud and water in the secondary sedimentation tank, and then oxidized and micro-flocculated in the oxidation micro-flocculation tank, and then filtered through the filter, and finally Enter the reuse drainage pool for reuse or discharge. In the degradation process, after the heavy metal ion up-to-standard wastewater flows into the high-efficiency biochemical combination pool, the content of DO, MLSS, and biological iron is controlled by adding microbial nutrient solution, so that the attached and suspended obligate bacteria can be fully degraded by their own metabolism. organic matter in wastewater. The DO is 2-4mg / L. The MLSS is 2.5-3.5g / L. The biological iron content is 100-150 mg / L. The organic pollutants in the wastewater a...
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The invention provides an electroplating waste water high-efficiency combined biochemical treatment technique, which comprises: degrading waste water of which the heavy metal ion content reaches a standard in a high-efficiency biochemical combined pool, separating sludge and water in a secondary settling pool, performing oxidization and microflocculation reactions in an oxidization and microflocculation pool, filtering in a filter, and recycling or emitting in a recycling and emitting pool. In the invention, electroplating comprehensive waste water can be treated effectively, so all pollutionindexes of the effluent reach special emission limit standards in Emission Standards for Electroplating Pollutants GB 21900-2008.
Description
technical field [0001] The invention relates to advanced treatment of electroplating wastewater before discharge, in particular to a high-efficiency combined biochemical treatment technology for electroplating wastewater. Background technique [0002] Since the promulgation and implementation of the new standard GB 21900-2008 of "Electroplating Pollutant Discharge Standard", the original traditional wastewater treatment facilities of many enterprises in the electroplating industry can no longer meet the requirements of the new standard, and they are all exploring and looking for cost-effective treatment methods. Electroplating wastewater has many electroplating processes and complex wastewater components. In addition to various heavy metal pollution indicators, there are also organic pollutants COD and nutritional indicators NH 3 -N, total nitrogen, total phosphorus and other indicators, currently many electroplating companies have no effective treatment methods for this. ...
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IPC IPC(8): C02F9/14C02F101/20C02F103/16
Inventor 张金华
Owner 浙江平湖绿色环保技术发展有限公司