Industrial park comprehensive sewage treatment method

Abstract

The invention discloses an industrial park comprehensive sewage treatment method, and belongs to the technical field of sewage treatment environmental protection. The treatment method is a combined process of a plurality of units, and mainly comprises a pretreatment unit, a front advanced oxidation unit, a primary biochemical treatment unit, a rear advanced oxidation unit and a secondary biochemical treatment unit. The process combination is reasonable, the impact load resistance is high, the treatment capacity is high, the effluent quality is stable and reaches the standard, and the method is suitable for treatment of comprehensive sewage of industrial wastewater and domestic sewage generated in various industrial parks.

Description

technical field [0001] The invention relates to a treatment method for industrial sewage, in particular to a treatment method for comprehensive sewage in industrial parks, and belongs to the technical field of environmental protection. Background technique [0002] An industrial park is a country or region's government, according to the internal requirements of its own economic development, demarcates an area through administrative means, gathers various production factors, conducts scientific integration within a certain space, improves the intensive intensity of industrialization, and highlights industrial characteristics. Optimize the functional layout to make it a modern industrial division of labor and collaborative production area that adapts to market competition and industrial upgrading. my country's industrial parks include various types of development zones, such as national economic and technological development zones, high-tech industrial development zones, bonde...

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Problems solved by technology

[0004] Chinese patent application 201010519102.6 protects a petrochemical wastewater treatment process, which uses reverse osmosis, advanced oxidation and aerobic biological treatment in series to treat petrochemical wastewater. The first step of the process uses reverse osmosis technology, which can easily cause reverse osmosis Membrane clogging fails, thereby increasing treatment costs. In addition, only one-level aerobic biological treatment is used, which will inevitably increase microbial organic loads, making it difficult to maintain high treatment efficiency for a long time

[0005] Chinese patent application 201310195845.6 discloses a new process for treating coking wastewater and coal chemical wastewater, including pretreatment, resin adsorption, air stripping, and biological treatment links. The air stripping link of this process requires a large amount of steam, resulting in increased operating costs , and the air stripping process is more polluting to the air environment, it is more suitable for use in open areas, so the promotion area is limited

[0006] Chinese patent application 201510506359.0 discloses a comprehensive treatment method for chemical wastewater, including a pre-treatment system, a primary biochemical system, an ozone treatment system, a secondary biochemical system, and a post-treatment system. Both the pre-treatment system and the post-blowing system use A large amount of coagulants and precipitants, high operating costs

[0007] Chinese patent application 201610638615.6 discloses a high-concentration refractory chemical wastewater treatment process, through wastewater collection, pH adjustment, precipitation separation, first iron-carbon Fenton reaction, anaerobic, second iron-carbon Fenton, aerobic, etc. A series of workshops achieve their purpose. This process uses ammonium magnesium phosphate precipitation method and sodium hypochlorite oxidation method to remove ammonia nitrogen in wastewater, which not only increases the treatment cost, but also produces a large amount of ammonium magnesium phosphate hazardous waste

[0008] Chinese patent application 201710253156.4 discloses a petrochemical wastewater treatment method, including oil separation treatment, air flotation treatment, advanced oxidation, flocculation treatment, biological treatment and other steps. This method uses Fenton oxidation technology as the advanced oxidation method, although degradation can be achieved The purpose of organic matter, but there are also problems such as large dosage of traditional Fenton oxidation reagents and limited operation of pH value

[0009] Chinese patent application 201810073426.8 discloses a pretreatment method and pretreatment system for high-concentration pharmaceutical and chemical wastewater, including adjustment, coagulation air flotation, ozone synergistic hydrogen peroxide oxidation, hydrolytic acidification, precipitation, anaerobic biological contact and precipitation treatment steps. The method is a wastewater pretreatment method, the purpose of which is to improve the biochemical properties of high-concentration wastewater in pharmaceutical and chemical industries, reduce the toxicity of wastewater, and cannot achieve the discharge of wastewater up to standard

The treatment device and method can deeply mineralize and remove the organic matter in the secondary effluent of industrial park comprehensive sewage, but it does not directly apply to the treatment of industrial park comprehensive sewage. Therefore, the premise of using this treatment device and method is that the industrial park comprehensive sewage needs to be Other means meet their water quality standards after primary and secondary treatment, so certain limits apply

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