A hydraulic cavitation treatment process for high-concentration organic wastewater

Abstract

The present invention relates to the technical field of organic wastewater treatment, in particular to a hydraulic cavitation treatment process for high-concentration organic wastewater comprising steps: (1) micro-electrolysis: adjusting the pH value of organic wastewater, and then subjecting the organic wastewater to micro-electrolysis reaction treatment; ( 2) Coagulation and sedimentation: the organic wastewater is passed into the coagulation sedimentation tank, and activated carbon and flocculant are added for flocculation and sedimentation to obtain a mixture of supernatant and activated sludge; (3) hydraulic cavitation: the activated sludge is mixed The liquid is subjected to ultrasonic cavitation treatment in the ultrasonic cavitation equipment to obtain the mixed liquid of the return sludge; (4) Fenton reaction: the supernatant and the mixed liquid of the return sludge are subjected to the Fenton reaction treatment in the Fenton reaction tank to obtain Oxygenated water; (5) Sedimentation in the secondary sedimentation tank: the oxidized water is passed into the secondary sedimentation tank for sedimentation treatment, that is, purified water is obtained. The present invention replaces biological treatment with hydraulic cavitation and combines it with chemical treatment to reduce the generation of refractory sludge and lower the treatment cost.

Description

technical field [0001] The invention relates to the technical field of organic wastewater treatment, in particular to a hydraulic cavitation treatment process for high-concentration organic wastewater. Background technique [0002] With the rapid development of my country's chemical industry, the chemical industry produces a large amount of organic pollutants in the production process. These pollutants enter the water body through various channels, causing the quality of the water environment to deteriorate and threatening the safety of human life. [0003] Wastewater treatment methods can be divided into physical methods, chemical methods, physicochemical methods and biological methods in terms of the principle of action. Use conventional physical, chemical and biological methods to treat domestic wastewater, such as urban domestic wastewater. Organic wastewater that is toxic and harmful to organisms or high-concentration organic wastewater that is difficult to biodegrade ...

AI Technical Summary

Problems solved by technology

The most commonly used biochemical method is the activated sludge method. Under the action of bacterial extracellular enzymes, some difficult-to-decompose macromolecular organic substances can be decomposed into small molecular organic substances, but there will be more and more bacterial micelles in the sludge components. The sludge continues to grow until it cannot be returned for treatment, and the remaining sludge has a high cost of treatment, which is not conducive to the cost reduction of water purification