摘要：

采用反应沉淀/水解酸化/MBR组合工艺处理以合成制药废水为主的污水处理厂污水,处理出水不能达到《化学合成类制药工业水污染物排放标准》(GB 21904—2008)的要求。对此采用铁炭微电解工艺作为前置处理工艺对该废水进行了预处理实验研究,结果表明,当铁炭投加量为400 g/L,铁炭质量比为4:5,HRT=3 h,pH=4,曝气量为3 L/min时,预处理效果较好,铁炭微电解对COD的去除率达47.50%,废水可生化性由0.23提升到0.38,使后续工艺运行效果大幅提升,最终使处理出水达标排放。

关键词: 铁炭微电解, 水解酸化, 膜生物反应器, 制药废水

Abstract:

The combined process,reaction sedimentation/hydrolysis-acidification/MBR,has been used for treating the wastewater mainly containing chemically synthesized pharmaceutical wastewater in a wastewater treatment plant. The treated effluent could not reach the Discharge Standards of Water Pollutants from Pharmaceutical Wastewater of Chemically Synthetic Category(GB 21904—2008).Because of this,the experimental research on the pre-treatment of this kind of wastewater is now conducted by iron-carbon micro-electrolysis process as its pre-treatment technology, The results show that the treatment effect is better when the iron-carbon dosage is 400 g/L,iron/carbon mass ratio is 4: 5,HRT=3 h,pH=4,aeration rate=3 L/min. The COD removing rate by iron-carbon micro-electrolysis process reaches 47.50%,and the biodegradability is increased from 0.23 to 0.38,making the running effect of the subsequent process improve greatly,and finally making the treated effluent reach the set standard.

Key words: iron-carbon micro-electrolysis, hydrolysis acidification, membrane bio-reactor(MBR), pharmaceutical wastewater

中图分类号: 

• X703.1