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通过小试模拟完全混合推流式活性污泥曝气池(串联CMAS工艺)处理哈尔滨某制药生产废水,优化实际工程的工艺运行参数,研究各污染物在系统中的去除特性.在F/M为0.1~0.2或0.8~1.5 gCOD/(gMLSS.d)、SRT为8~10 d、DO为1~3 mg/L、水温为27~34℃的运行条件下,串联CMAS工艺系统中污泥沉降性较好,对COD和TSS去除率分别大于90%和95%.活性污泥的平均比摄氧速率SOUR平均=49.5 mg/(gMLSS.h),表明串联CMAS曝气池中的污泥具有良好的活性.当水力停留时间HRT相同时,增加CMAS曝气池数有利于污泥沉降.该工艺对COD的生物降解规律遵循ρ(CODe)=ρ(COD0)×e-a t的数学模型.将模拟试验结论应用于实际工程的运行结果表明,该系统运行高效稳定,出水指标满足《污水综合排放标准(GB8978-1996)》的一级标准.
The wastewater from a pharmaceutical production in Harbin was processed by a small test simulation of fully mixed flow-through activated sludge aeration tank (CMAS), and the process operating parameters of the actual project were optimized to study the removal characteristics of each pollutant in the system. Was 0.1 ~ 0.2 or 0.8 ~ 1.5 gCOD / (gMLSS.d), SRT was 8 ~ 10 d, DO was 1 ~ 3 mg / L, water temperature was 27 ~ 34 ℃. Sedimentation was better, and removal rates of COD and TSS were more than 90% and 95%, respectively.The average SOUR uptake rate of activated sludge was 49.5 mg / (gMLSS.h), indicating that the sludge in the tandem CMAS aeration tank With good HRT.When the hydraulic HRT is the same, increasing the number of CMAS aeration tank is beneficial to sludge deposition.The biodegradation of COD follows the mathematical model of ρ (CODe) = ρ (COD0) × ea t. The simulation results are applied to the actual project. The results show that the system runs efficiently and steadily, and the effluent index meets the first class standard of Integrated Wastewater Discharge Standard (GB8978-1996).