Organic/inorganic heavy-metal production waste water treatment method based on up-to-stand discharge

Abstract

The invention discloses an organic / inorganic heavy-metal production waste water treatment method based on up-to-stand discharge. The method includes subjecting copper and nickle containing waste waterto chemical precipitation in a sequencing batch type mixed reaction sedimentation tank and feeding out-flowing water into an intermediate water tank; feeding chromium containing waste water in a chromate breaking tank and a sequencing batch type mixed reaction sedimentation tank sequentially to obtain out-flowing water and feeding the out-flowing water in the intermediate water tank; feeding organic waste water in a microelectrolysis-Fenton reaction tank and a lamella settler and then feeding out-flowing water into the intermediate water tank; feeding mixture of the copper and nickle containing waste water, the chromium containing water and the organic waste water gathered in the intermediate water tank into an AO-MBR reactor, and then feeding out-flowing water of the mixture into an out-flowing tank to achieve up-to-stand discharge. Through combination of the microelectrolysis and Fenton reaction, organic / inorganic heavy metal production waste water is treated in advance , removal ofcomplex heavy metal is enhanced and biodegradability is improved; by the AO-MBR process having high impact resistance capacity, organic / inorganic composite contaminants are subjected to advanced treatment, and accordingly, the process can meet technical requirements on organic / inorganic heavy metal production waste water treatment in electroplating industrial zones, and guarantee stably up-to-stand discharge of out-flowing water.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a standard-reaching treatment method for organic-inorganic compound-polluted heavy metal production wastewater in electroplating industrial parks, and in particular to a method for improving the removal of organic complex heavy metals and refractory organic matter in wastewater, so that the quality of effluent reaches the discharge standard processing method. Background technique [0002] With the rapid development of my country's economy, the basic processing and manufacturing industry has also developed rapidly. A large number of cities and towns have established surface treatment industrial parks, and some industrial parks produce wastewater that is directly discharged after treatment. Electroplating wastewater is not only complex in composition, but also varies greatly with different plating types. Typical pollutants in wastewater include heavy metal ions such as chrom...

AI Technical Summary

Problems solved by technology

This method needs to consume a large amount of chemicals and the generated sediment will produce a large amount of sludge with low density, which will bring problems to the subsequent sludge dewatering and disposal; in addition, due to the presence of complexing agents in the electroplating wastewater, the precipitation method is difficult. Effectively remove complexed heavy metals

For the organic matter in the electroplating wastewater, when the park uses the activated sludge method to treat the wastewater, the biodegradability of the wastewater is poor, and the presence of complexed heavy metals will cause stress to the microorganisms, resulting in poor treatment effect of the biochemical unit and unstable system performance, making it difficult to discharge the effluent. standard

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