UHASB升流式水解酸化反应器处理制药废水的中试试验

Pilot Study on UHASB Upflow Hydrolysis Acidification Reactor for Pharmaceutical Wastewater Treatment

针对某制药废水为主的工业污水厂水解酸化池因布水不均、污泥板结和短流等导致运行效果不佳的问题,利用UHASB升流式水解酸化器对制药废水为主的工业污水进行了中试试验。试验结果显示:当COD_(Cr)进水质量浓度为195.4~600 mg/L时,两套中试设备平均COD_(Cr)去除率超过31.51%,平均SCOD_(Cr)/COD_(Cr)超过0.80,相较于对照组COD_(Cr)去除率提高15%以上,SCOD_(Cr)/COD_(Cr)(0.63)提升33%以上;当进水受到水质水量冲击时,中试设备出水水质维持稳定,COD_(Cr)质量浓度约为200 mg/L,波动抑制率超过60%。研究结果表明:UHASB升流式水解酸化反应器用于处理该污水厂废水,其处理效果相较于污水厂现有预处理工段具备明显优势,中试试验为该工业污水厂预处理工段的改造提供技术参考。

For the issue of poor operational performance of the hydrolysis acidification tank in the industrial wastewater treatment plants(WWTPs)with pharmaceutical wastewater as the main source,caused by uneven water distribution,sludge compaction,and short flow.A pilot-scale test was conducted on the industrial wastewater which mostly consisted in pharmaceutical wastewater,using an upflow hydrolysis acidification reactor-UHASB.The result of field test showed that when the COD_(Cr) concentration of influent water was 195.4~600 mg/L,the average CODc removal rates of two pilot-scale devices above 31.51%,and the average SCOD_(Cr)/COD_(Cr) ratios above 0.80,compared to the control group,the COD_(Cr) removal rate was increased by more than 15%,and the average SCOD_(Cr)/COD_(Cr) ratio was improved by over 33%;When the influent water was affected by quality or quantity shocks,the COD_(Cr) concentration of outlet water in the pilot-scale devices remain stably at around 200 mg/L,with the COD_(Cr) fluctuation inhibition rate exceeding 60%.The research results indicate that the UHASB upflow hydrolysis acidification reactor has significant advantages in treating wastewater from the WWTP compared to the existing pre-treatment processes.The pilot study provides technical reference for the renovation of the industrial wastewater treatment plants.