响应面优化EM菌对皂素废水的处理工艺

Response surface optimizing process for treating saponin wastewater by EM bacteria

通过对黄姜皂素废水的水质分析,设计并检验了铁碳微电解-Fenton氧化-EM菌处理工艺,主要研究了EM菌对废水的处理效果。利用红外光谱(FT-IR)、紫外光谱(UV)、TOC对其进行检测,考察了pH、曝气时间、EM菌质量分数、反应温度对皂素废水COD去除率的影响。在单因素实验的基础上,采用响应面分析法对工艺进行优化,建立了各影响因子关于COD去除率的回归方程,得到该工艺的最佳条件:pH为8.0,曝气时间为46 h,EM菌投加量为1.2%,反应温度为30℃。在最佳工艺条件下,COD去除率为88.04%。

Through the analysis on zingiberin saponin wastewater,the iron-carbon micro-electrolysis/Fenton oxidation/EM bacteria treatment process is designed and evaluated to study the treatment effect of EM bacteria on the wastewater.The effects of pH,aeration time,dosage of EM bacteria and reaction temperature on the COD removal rate of saponin wastewater are investigated by means of FTIR,UV and TOC. On the base of single factor experiment,the treatment process is optimized by response surface analysis method and regression equations for all factors on COD removal rate are established.The optimum conditions for the treatment process are obtained as follows： pH = 8. 0,aeration time is 46 h,EM bacteria dosage is 1. 2% and the reaction temperature remains at 30℃.Under the optimum conditions,COD removal rate can reach 88. 04%.