Technical Research On The Wastewater Treatment Process Of A Certain Fine Chemical Plant

The fine chemical industry in China is in a rapid development stage and also faces severe challenges of fine chemical wastewater pollution.On the one hand,the composition of fine chemical wastewater is complex and difficult to treat.At the same time,traditional processes have problems such as incomplete treatment and high costs.Some enterprises have set up hidden pipes to secretly discharge or exceed standards in order to reduce costs,resulting in ecological environment damage that has become a major problem that needs to be solved urgently.On the other hand,during the "Thirteenth Five-Year Plan" period,China has built pollution control projects on a large scale,and the trend of environmental deterioration has been further alleviated,but the overall situation is still grim.Low energy consumption,high treatment efficiency,and low operating costs are important development directions for water treatment processes,and are also one of the national energy-saving and emission reduction development directions.This study combines an example of fine chemical wastewater treatment in Jilin Province to optimize the fine chemical wastewater treatment process.This process has the characteristics of high wastewater treatment efficiency,low energy consumption,low cost,and low sludge volume,which has technical reference and practical significance for fine chemical wastewater treatment.(1)The treatment of fine chemical wastewater usually adopts a technical route with biochemical method as the main method and physicochemical method as the auxiliary method.However,the energy consumption and cost required for multiple dosing and separation sedimentation processes are high,making it difficult to meet the development requirements of enterprises.This study comprehensively compares various aspects such as technical characteristics,energy consumption,and cost,and determines the use of a combined treatment process of "homogeneous regulation-ABR-SBR-ABR-SBRcoagulation sedimentation" This combined treatment process not only effectively reduces energy consumption,but also has good economic advantages,making it a sustainable and efficient wastewater treatment process.(2)In biochemical processes,the selection of microbial strains plays a crucial role in the effectiveness of water treatment.Therefore,this study focuses on the combinatorial optimization of the bacteria added in the biochemical section,and in-depth study of the degradation effect of EST composite bacteria on pollutants.The research results show that compared to activated sludge,EST composite bacteria have better salt tolerance and can work normally in high chlorine and high ammonia nitrogen environments,with a removal rate of over 85%.At the same time,the application of EST composite bacteria can also reduce the amount of sludge discharged,with a reduction of up to 35%.(3)This study combines EST composite bacteria with the "homogeneous regulationABR-SBR-ABR-SBR-coagulation sedimentation" process and applies it to a sewage treatment station of a fine chemical plant in Jilin Province.The actual operation results show that the treated fine chemical wastewater has stable effluent quality,and all indicators meet the tertiary discharge standards in the "Comprehensive Wastewater Discharge Standard"(GB8978-1996).It can be further treated in urban sewage treatment plants.The total investment of the sewage treatment station is 5.1652 million yuan,with a unit water treatment cost of 2.73 yuan.Under the same scale conditions,the investment and operating costs of this process are lower than other commonly used processes.This indicates that this process not only has good treatment efficiency,but also has high economic efficiency,successfully solving problems such as long traditional process routes,high energy consumption,and poor economic benefits,providing reference and reference for fine chemical wastewater treatment.