Mixed treatment method of explosive waste water and nitrobenzene and aniline waster water

Abstract

The invention belongs to the field of industrial waster water treatment, and more particularly relates to the technical field of waste water treatment of mixed waste water containing pollutant such as nitramines, nitrobenzenes and anilines and the like in the explosive and polyurethane industry by using pretreatment in combination with a biochemistry method. A mixed treatment method of explosive waste water and nitrobenzene and aniline waster water is characterized in that the waste water reaches the recycling standard after being subjected to procedures, such as activated carbon adsorption, neutralization with limestone and caustic soda liquid, flocculation settling, biochemical treatment with an up-flow anaerobic sludge blanket (UASB) / AF (Anaerobic filter) and activated sludge, processing with a ceramisite biological aerated filter (BAF), filtration and adsorption, waste activated carbon and sludge after-treatment. The mixed treatment method disclosed by the invention has the advantages of stable and reliable equipment operation, qualified effluent continuity, small excess sludge amount, low energy consumption, reasonable process, strong applicability and relatively good shock resistance and operability.

Description

technical field [0001] The invention belongs to the field of industrial waste water treatment, specifically relates to the technical field of treating waste water mixed with pollutants such as nitramines, nitrobenzenes and anilines produced in explosives and polyurethane industries by pretreatment combined with biochemical methods. Background technique [0002] Gansu Yinguang Chemical Industry Group Co., Ltd. will produce a large amount of nitramines, dinitrotoluene (DNT) and toluene diamine in the production process of multiple explosives production lines and dinitrotoluene (DNT) and toluene diisocyanate (TDI) (TDA) production wastewater. The components of wastewater are relatively complex, and the indicators of nitramines, nitrobenzenes, aniline pollutants, COD, chroma, pH (acidity) and other indicators in wastewater seriously exceed the standard. The pollutants contained in nitramine wastewater are mainly RDX, HMX, Taian and organic solvents such as acetic acid, acetone,...

AI Technical Summary

Problems solved by technology

Biological treatment technology is safe in operation, low in operating cost, and can realize complete mineralization of pollutants, but there are also problems such as low concentration of microbial tolerance to pollution, slow degradation rate, screening and cultivation of special strains, etc.

Images