摘要
研究了化学絮凝法和微电解法预处理酯化废水的工艺条件。首先考察了原水p H值、絮凝剂投加量及絮凝剂与阳离子聚丙烯酰胺复配对化学絮凝效果的影响;然后考察了p H、停留时间、填料量、曝气时间对微电解效果的影响。试验结果表明:化学絮凝在原水p H值为7.5、PFS+CPAM(360 mg/L+60 mg/L)时对酯化废水处理效果最好,COD去除率为17.23%;微电解法在最佳工艺条件(p H为2,反应时间为2 h,填料量为30%,曝气时间为5 min)下对酯化废水COD去除率达到30%以上,且在不调酸不曝气的情况下也可获得良好处理效果,COD去除率达20%以上,故酯化废水的预处理中采用微电解法。
In this study,the operation conditions of pretreating esterification wastewater by the chemical coagulation and micro-electrolysis method were investigated. On the one hand,the influences of initial p H,flocculants dosage,and flocculants coupled with CPAM were investigated; on the other hand,the influences of p H,hydraulic retention time,filler amount and aeration time on the removal of COD were explored. The results showed that: Coagulation by PFS coupled with CPAM( 90 mg/L + 15 mg/L) with the initial p H of 7. 5 could remove up to 17. 23%. And the COD of wastewater could be removed up to 30% by micro-electrolysis at the optimum reaction conditions( p H of 2,HRT of 2 h,the filler content of 30%,aeration time of 5 min),meanwhile experimental data indicated that raw water without aeration also could achieve good results,and COD removal efficiency reached more than 20%,thus micro-electrolysis could regard as the pretreatment of esterification wastewater.
出处
《环境工程》
CAS
CSCD
北大核心
2016年第S1期373-377,共5页
Environmental Engineering
关键词
酯化废水
铁碳微电解
化学絮凝
预处理
esterification wastewater
micro-electrolysis
chemical coagulation
pretreatment
