A combined emergency treatment method for black and odorous water with forward osmosis-coagulation-anoxic hydrolysis

Abstract

The invention discloses a combined emergency treatment method for black and odorous water by forward osmosis, coagulation and anoxic hydrolysis. The black and odorous water is first subjected to three-stage concentration treatment through stepped forward osmosis, and the stepped concentration makes the single-stage flux low and the degree of membrane pollution light. , which can be operated continuously; the drawn liquid diluted in the forward osmosis process is re-concentrated and recycled by reverse osmosis, which can avoid secondary pollution; the volume of concentrated black and odorous water is greatly reduced, and the concentration of organic matter, iron, manganese, etc. is significantly increased, which is effective Reduce treatment capacity and improve efficiency; then remove iron, manganese, suspended solids and colloidal substances in water through coagulation and sedimentation, and anoxic hydrolysis to improve the biodegradability of concentrated water. The effluent finally enters the sewage plant, avoiding aeration and in-situ injection. The disadvantages of conventional methods such as adding coagulants still remain in the water body.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a combined emergency treatment method for black and odorous water with forward osmosis-coagulation-anoxic hydrolysis. Background technique [0002] Due to the discharge of industrial wastewater and domestic sewage, the ecosystems of urban rivers, lakes and other surface water bodies are facing major challenges. Black and odor has become a common problem in many cities in my country. The formation mechanism of black odor is that when the water body suffers from serious organic pollution, the aerobic decomposition of organic matter causes the oxygen consumption rate in the water body to be greater than the reoxygenation rate, resulting in anoxic water body, resulting in incomplete degradation of organic matter, slowing down, and anaerobic biodegradation process. Hydrogen sulfide, amine, ammonia, mercaptan and other odorous substances form black substan...

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Problems solved by technology

[0004] Aiming at the current problems of large investment in black and odorous water treatment, slow results, and easy repetition of treating the symptoms but not the root cause, the present invention proposes a combined emergency treatment method of black and odorous water forward osmosis-coagulation-anoxic hydrolysis to realize the emergency treatment of black and odorous water Fast, stable, long-term goals

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