Method of treating coal gas effluent and coking effluent using diatomite and active sludge

A technology for activated sludge and coking wastewater, applied in water/sludge/sewage treatment, chemical instruments and methods, adsorbed water/sewage treatment, etc.

Inactive Publication Date: 2005-03-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a low-cost, high-efficiency method of using diatomite and activated sludge to treat gas wastewater and coking wastewater. This method not only strengthens the removal of organic and inorganic pollutants in water by the activated sludge process , and solve the problems of no sludge growth and easy sludge bulking that often occur in the treatment of toxic industrial wastewater by the traditional activated sludge process, making the system more adaptable to water quality changes and more stable and reliable in operation

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  • Method of treating coal gas effluent and coking effluent using diatomite and active sludge

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specific Embodiment approach 1

[0006] Embodiment 1: This embodiment consists of the following processes: (1) inject waste water into the bioreactor, then add activated sludge and diatomaceous earth for aeration; (2) pass the waste water mixture through the secondary Sedimentation tank for mud-water separation, diatomaceous earth together with activated sludge in the secondary sedimentation tank for mud-water separation, together with the sludge back to the diatomite-activated sludge reactor. The dosage of diatomite is 300-3000mg / L, and the dosage of diatomite is preferably 2000mg / L; the diatomite is natural diatomite, artificially purified diatomite or surface modified diatomite , wherein the surface modification includes inorganic salt impregnation modification and medium-high temperature (100-800°C) sintering modification; the diatomaceous earth is added to the bioreactor in the form of wet solution addition or direct addition using dry injection equipment Add; the COD value of the waste water when it ent...

specific Embodiment approach 2

[0007] Specific implementation mode two: the following combination figure 1 The present embodiment is described in detail. This embodiment is achieved in the following way: a. Inject gas or coking waste water (generally waste water after ammonia steaming and dephenolization pretreatment) into the regulating tank with a certain flow rate, and then inject dilution water in a certain proportion (dilution water can use coarsely filtered river water, domestic sewage, etc.), so that the COD concentration of the wastewater in the adjustment tank is 800-3600mg / L, and the preferred range is 1800-2600mg / L; b, due to the high concentration of ammonia in the wastewater , the pH of the mixed water in the adjustment tank is relatively high, and a small amount of sulfuric acid, phosphoric acid and other acid agents need to be added to control the pH between 6.5 and 7.5; Oxygen aeration to form an aerobic biochemical environment, then add a certain amount of phosphorus, calcium, magnesium and...

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Abstract

A process for treating the gas waste water and coking waste water by diatomite and active sludge includes such steps as loading said waste water in bioreactor, adding diatomite and active sludge, aerating, flowing in depositing pool, depositing and mud-water separation.

Description

Technical field: [0001] The invention relates to a biological treatment method of gas wastewater and coking wastewater, in particular to a method for treating gas wastewater and coking wastewater by using diatomite and activated sludge. Background technique: [0002] Phenolic substances are the main components of organic matter in gas and coking wastewater, accounting for about 60% to 80% of the total organic matter. The heterocyclic compounds of nitrogen, oxygen and sulfur, most of which are mutagenic substances; the inorganic compounds in wastewater mainly include ammonia, and a small amount of cyanide and rhodium cyanide, all of which are pollutants strictly controlled in my country. Therefore, if the gas waste water is directly discharged into the surrounding water body without treatment, it will cause serious environmental pollution. [0003] Biological treatment is the core treatment process of gas and coking wastewater, and aerobic biological treatment process plays a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F3/12
CPCY02W10/10
Inventor 马军张文启
Owner HARBIN INST OF TECH
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