Ternary electrolytic sewage treatment combined process

Abstract

The invention discloses a ternary electrolytic sewage treatment combined process and application thereof to petroleum and petrochemical wastewater treatment. The process comprises the steps of: successively conducting electrolysis flotation, electrolysis catalysis, electrolysis flocculation, precipitation separation, biological treatment, catalytic electrolysis flocculation and sedimentation separation on highly difficult wastewater, detecting the obtained water, discharging qualified water, and sending the sludge obtained in electrolysis flotation, sedimentation separation, biochemical treatment and precipitation separation to a sludge pool for sludge treatment. The electrolysis combined treatment process provided by the invention is a modular integrated treatment system, which can be combined flexibly according to the specific needs, so as to play the potential advantage of the sewage treatment steps to the greatest and cooperate with each treatment step to complete optimized treatment on various wastewater.

Description

technical field [0001] The invention relates to a combined three-element electrolysis sewage treatment process. Background technique [0002] Difficult wastewater refers to wastewater that is difficult to biochemically degrade and has complex treatment processes generated during industrial production. It mainly includes: landfill leachate, petrochemical wastewater, pharmaceutical and chemical wastewater, coking wastewater, pesticide wastewater, essence, spice wastewater, (large Most chemical wastewater belongs to the range of difficult wastewater), printing and dyeing, dye wastewater, tannery wastewater, papermaking wastewater, electroplating wastewater, electronic wastewater, metallurgical wastewater, etc. The composition of difficult sewage is caused by organic pollution. The molecular structure is polycyclic or heterocyclic. The molecular structure is stable, and the chemical oxygen consumption is generally above 104 / l. For example, the chemical oxygen demand (COD) of la...

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Problems solved by technology

[0007]1. The processing technology is complicated and difficult to realize;

[0008]2. The sewage index is difficult to control, and the effluent indication is unstable and difficult to reach the standard;

[0009]3. The investment in governance is high, and the high one can reach more than 10,000 yuan;

[0010]4. Occupying a large area of ​​land (wasting land resources);

[0011]5. High operating cost;

[0012]6. The maintenance is complicated, the maintenance cycle is short, time-consuming and labor-intensive;

[0013]7. Secondary pollution to the air during the treatment process

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