Iron-carbon micro-electrolysis-dynamic membrane wastewater deep treatment process

Abstract

The invention relates to an iron-carbon micro-electrolysis-dynamic membrane wastewater deep treatment process. The process comprises the following steps: pretreating pollutants in industrial wastewater by iron-carbon micro-electrolysis so as to remove partial pollutants and improve the biochemical performance of the wastewater; then, carrying out microorganism degradation by mainly using mixed liquids in a hydrolysis acidification pool and an aerobic dynamic membrane reaction pool so as to remove the pollutants; and finally, completing the solid-liquid separation and water discharge process of the mixed liquid with a dynamic membrane assembly. The invention aims at providing the iron-carbon micro-electrolysis-dynamic membrane wastewater deep treatment process which is simple in process flow and efficient; the process can be effectively used for removing the difficultly-degradable organic substances in the industrial wastewater and improving the biochemical performance of the wastewater, and has obvious decoloring effect and good solid-liquid separation effect; the effluent is clear and does not contain suspended particles; and the process is suitable for standard-reaching discharge and deep treatment of various industrial wastewaters (such as dyeing and printing wastewater, pharmaceutical wastewater, heavy metal wastewater, coking wastewater, paper-making wastewater and the like), and the index of the quality of the treated effluent can meet the water quality standard of reused water.

Description

technical field [0001] The invention belongs to the technical fields of degradation and removal of industrial wastewater pollutants and advanced treatment and reuse, and specifically relates to an iron-carbon micro-electrolysis-dynamic membrane advanced treatment process for industrial wastewater. Background technique [0002] According to the first national survey of pollution sources completed in 2010, the annual production of industrial wastewater in my country is 73.833 billion tons, the discharge volume is 23.673 billion tons, and the annual wastewater treatment volume is 45.852 billion tons. The main pollutants produced in industrial wastewater: 31.4535 million tons of chemical oxygen demand, 2.0167 million tons of ammonia nitrogen, 541,500 tons of petroleum, 123,800 tons of volatile phenols, and 24,300 tons of heavy metals. my country's water resources are scarce, and the advanced treatment and reuse of industrial wastewater has become the choice of many regions as a ...

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Problems solved by technology

[0004] However, the main problem in the actual operation of micro-electrolysis is that after a period of operation of the iron filings processing device, a passivation film is formed on the surface of the filler, and the iron filings are easy to agglomerate and channeling occurs, which greatly reduces the treatment effect; micro-electrolysis treatment Wastewater is usually carried out under acidic conditions, resulting in a large amount of iron dissolution, and at the same time adding alkali to neutralize a large amount of precipitated substances

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