采用响应面分析法(RSM)对红平红球菌所产发酵液与聚合氯化铝(PAC)复配处理高岭土悬浊液及发酵液与改性沸石复配处理猪场废水厌氧消化液的过程进行了优化.设定的响应值分别为絮凝率和絮体粒径,COD和氨氮去除率.实验分别拟合了关于絮凝率,絮体粒径,COD去除率和氨氮去除率的二次模型,决定系数(R2)分别为0.8933,0.8353,0.7819和0.8343,表明拟合情况良好.根据响应值的分布情况,确定高岭土悬浊液的最佳絮凝条件为发酵液3.7mL/L,PAC 49mg/L,pH值8.7,CaCl224mg/L,反应时间15min,相应絮凝率和絮体粒径分别为96.3％和0.67m；猪场废水厌氧消化液的最佳絮凝条件为发酵液4.5mL/L,改性沸石12g/L,pH值8.3,CaCl216mg/L,反应时间55min,相应COD,氨氮去除率分别为87.9％和86.9％.%Response surface methodology (RSM) was employed to optimize the treatment processes of kaolin suspension and digested swine wastewater by the complex of broth produced by Rhodococcus erythropolis and either PAC or modified zeolite. Flocculating rate, floc size, COD and ammonium removal rates were settled as the target responses. As the determination coefficients (R2) of 0.8933, 0.8353, 0.7819 and 0.8343, the quadratic models could agree with experimental data well. Results showed that the optimal flocculating conditions for kaolin suspension were broth dosage of 3.7mL/L, PAC dosage of 49mg/L, CaCl2 dosage of 24 mg/L, pH=8.7 and contact time of 15 min, and the corresponding flocculating rate and floc size were 96.3% and 0.67mm. The optimal conditions for digested swine wastewater treatment were broth dosage of 4.5mL/L, modified zeolite dosage of 12 g/L, CaCl2 dosage of 16 mg/L, pH=8.3 and contact time of 55 min, and the corresponding removal rates of COD and ammonium were 87.9% and 86.9%.
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