某制药废水处理工艺运行分析

简要介绍了某化学合成制药废水处理工艺流程和主要运行参数,通过采集现场数据和SBR小试试验对其进行了分析。运行数据表明:现有工艺COD去除率68.9%,其中一级好氧去除62.6%,水解CASS组合去除6.3%;后续水解酸化对废水的可生化性没有改善,导致其和CASS的组合COD去除效果不佳,效费比低。温度对该工艺有重要影响,夏季水温可达43℃,严重影响出水水质。SBR小试结果表明:2%以下的盐度及其他可能基于浓度抑制的物质对好氧生化过程的COD去除没有影响,进一步对废水进行稀释没有意义。SBR小试以不到实际工艺一半的HRT,取得了明显优于后者的出水,意味着实际工艺有较大的改善潜力。

OPERATION ANALYSIS OF A PHARMACEUTICAL WASTEWATER TREATMENT PROCESS

A chemical synthesis-based pharmaceutical wastewater treatment process and its main operation parameters were briefly introduced.Field operation data was collected and bench scale SBR test was conducted to analyze the efficiency of the existing treatment process.The operation data showed that 68.9% of COD was removed by the existing treatment process,in which first aerobic removed 62.6% and hydrolytic acidification and CASS hybrid process removed only 6.3%.The hydrolytic acidification failed to improve the biodegradability,causing little COD was removed by its combination with CASS process,and the effective-cost rate was very low.Water temperature strongly affected the treatment efficiency.In summer it could reach to 43 ℃ and the effluent quality was seriously deteriorated.Bench scale SBR test showed that salinity less than 2% and other concentration basing inhibition substances did not affect the COD removal rate in aerobic biological process,so it made no sense to further dilute the wastewater.The HRT of the bench scale SBR test was less than half of the existing process,but the effluent quality was better than that of the existing process,which means that the existing process still has greater room for optimization.