【摘要】 采用水解酸化-生物接触氧化-上向流生物曝气滤池(H-O-BAF)组合工艺对皮革废水进行生物处理实验。分析了皮革废水水质和可生化性,研究了溶解氧质量浓度(DO)和水力停留时间(HRT)对该工艺处理效果的影响。该工艺处理皮革废水合适的HRT为:水解酸化10 h,生物接触氧化6 h,生物曝气滤池3 h左右。在合适的操作条件下该工艺对皮革废水COD、色度和总铬的去除率分别达到72.8%、80.0%和66.6%,处理出水水质达到排放标准。更多还原

【Abstract】 Tannery wastewater is treated by a combined process of the hydrolytic acidification,the biological contact oxidation and the upflow biological aerated filter(H-O-BAF).The quality and biodegradability of tannery wastewater are analyzed,and the influences of dissolved oxygen(DO) mass concentration and hydraulic retention time(HRT) on the treatment efficiency for the combined process are investigated.The wastewater is treated by the combined process under optimal HRT as:hydrolysis acidification of 10 h,biological contact oxidation of 6 h and biological aerated filter of about 3 h.The results also show that the average removal efficiency of COD,color and chromium is 72.8%,80.0% and 66.6%,respectively.The quality of the treated water can meet the local standard of wastewater discharge.更多还原