Petrochemical wastewater treatment method

Abstract

The invention discloses a petrochemical wastewater treatment method. The petrochemical wastewater treatment method comprises the following steps: 1) discharging sewage into a treatment tank and adjusting the pH (Potential of Hydrogen) value in the treatment tank to 5.5-6.0; 2) adding copper sulfate and a catalyst and adjusting the pH value to 3.6-6.0 again, wherein in each 5L of the sewage, 0.5g of the copper sulfate is added; 3) adding an oxidant into the treatment tank and controlling the electric potential of an oxidation-reduction reaction to be 200mV-220mV; 4) stirring for 1h to enable the sewage to be in sufficient contact with the oxidant and a catalyst and reacting to obtain a mixed solution A; 5) adjusting the pH value of the mixed solution A to 8.0 to 9.0 and adding polyacrylamide; sufficiently mixing to obtain a mixed solution B, wherein in each 5L of the sewage, 1mg-2mg of the polyacrylamide is added; 6) stirring the mixed solution B at a constant speed for 5min and sufficiently coagulating and reacting; and after standing and precipitating, taking supernatant as treated effluent. The petrochemical wastewater treatment method disclosed by the invention has the advantages of good catalysis effect, high purification effect, low production cost and wide applicable range.

Description

technical field [0001] The invention relates to wastewater treatment, in particular to a petrochemical wastewater treatment method. Background technique [0002] Use the by-product gas in oil refining production, naphtha and other light oil or heavy oil as raw materials for thermal cracking to produce chemical raw materials such as ethylene, and further react to synthesize various organic chemical products. The wastewater discharged during this process is called petrochemical wastewater; synthesis The wastewater discharged from the production process of rubber, synthetic plastics, fibers, detergents and other products, as well as chemical raw materials such as benzene, carbinol, methanol, glycerin, and acetaldehyde, is petrochemical wastewater, such as: Jinglun wastewater, refinery wastewater, and petrochemical industrial park comprehensive waste water; [0003] The pollutant composition of petrochemical wastewater is complex and highly toxic. There are organic sulfonates, ...

AI Technical Summary

Problems solved by technology

[0003] The pollutant composition of petrochemical wastewater is complex and highly toxic. There are organic sulfonates, EDTA, nonylphenol polyoxyethylene ether and other refractory substances, as well as certain biological inhibitory components such as sulfate, resulting in the biodegradability of wastewater. There are oil agents and polymers of various molecular weights in the wastewater. These substances exist in the water in the form of colloidal suspensions, which are difficult to settle naturally; the treatment of petrochemical wastewater is difficult, the input cost is high, and the impact on the environment Pollution constitutes serious pollution and other problems; with the continuous deepening of the national sustainable development strategy, improving and solving the problem of environmental pollution caused by petrochemical wastewater has become an urgent issue to be solved