乳酸菌饮料生产废水生物处理工艺实例分析

Case study on the treatment of lactobacillus beverage wastewater by biological treatment process

为实现NH^4+-N和COD的有效去除,采用完全混合式水解酸化+生物接触氧化为主体工艺处理乳酸菌饮料生产废水。该工程总投资355万元,直接运行成本为1.19元/吨。运行结果表明,生化处理单元在水力总停留时间为24 h、进水COD 872~1 389mg/L、进水NH4^+-N 5.8~15.0 mg/L的条件下,出水COD和NH^4+-N最大浓度分别为137 mg/L和3.8 mg/L,对COD和NH4^+-N的平均去除率分别为94.2 %和79.4 %,混凝沉淀出水COD可达到《污水综合排放标准》(GB8978-1996)一级标准要求。

Completely mixed hydrolysis-acidification reactor and bio-contact oxidation process were applied to treat Lactobacillus beverage wastewater to achieve high removal of NH^4 +-N and COD. The total investment of this project is 3,550,000 RMB and the direct operation cost is 1.19 RMB/t.The operation results show that,when the influent COD was 872~1 389mg/L,influent NH^4+-N was 5.8~15.0 mg/L and HRT was 24 hours,the maximum effluent COD and NH^4+-N concentrations would be 137 mg/L and 3.8 mg/L,respectively.The average removal rates of COD and NH^4 +-N were 94.2 % and 79.4 %,respectively.After coagulation and sedimentation processes,the effluent COD satisfied the first level requirements specified in the Integrated Wastewater Discharge Standard (GB8978-1996).