Quasi-earth-surface IV-type water standard deep treatment catalyst system, treatment method and device

Abstract

The invention discloses a quasi-earth-surface IV-type water standard deep treatment catalyst system, a treatment method and device, and belongs to the field of the environmental protection. The systemcomprises serially connected front end pre-reduction catalyst and secondary deep purification catalyst containing zero-valent iron / zero-valent copper / active carbon compositions. A mass ratio of iron / carbon in the front end pre-reduction catalyst is (2.5-7):1, and a mass ratio of iron / carbon in the secondary deep purification catalyst is (0.8-1.25):1. The method for treating biochemical tail waterby using the above catalyst system is performed through the following treatment units successively: 1) a front end pre-reduction unit; 2) a biological deep oxidation unit: further reducing COD, ammonia nitrogen and phosphorus of the system; 3) a deep sedimentation unit: removing suspended solids SS; and 4) a secondary deep purification unit. The secondary sedimentation tail water treated by the method is capable of removing toxicity of toxic and harmful organic pollutants, and deeply degrading and removing organic matters. The method is an efficient feasible quasi-earth-surface IV-type waterdeep treatment method.

Description

technical field [0001] The invention belongs to the field of environmental protection, and more specifically relates to a standard advanced treatment catalyst system, treatment method and equipment for quasi-surface Class IV water. Background technique [0002] With the development of reform and opening up, the chemical industry has sprung up like mushrooms, and a series of environmental pollution problems have become increasingly serious. The wastewater quality involves a wide range of categories, a large amount of pollution, and pollutants that are difficult to degrade are prominent problems in chemical enterprises that need to be resolved urgently. After a series of physicochemical / biochemical treatment methods for chemical wastewater, the indicators in the effluent have been close to or meet the discharge standards, but there are still refractory organics in the tail water that have not been completely degraded. Toxicity is still present. Highly toxic organics in chemi...

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Problems solved by technology

[0010] For the advanced treatment of existing biochemical tail water, it is difficult to achieve quasi-surface Class IV (COD (chemical oxygen demand) ≤ 30mg / L, NH 3 -N (ammonia nitrogen) ≤ 1.5mg / L, TP (total phosphorus) ≤ 0.3mg / L) discharge standard problem, the present invention provides a kind of advanced treatment catalyst system, treatment method and equipment of quasi-surface category IV water standard, catalyst By setting up a pre-reduction catalyst mainly based on reduction and supplemented by adsorption, and a secondary deep purification catalyst mainly based on adsorption and supplemented by reduction, combined with advanced treatment methods, the system can effectively achieve the standard of class IV surface water

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