【摘要】 采用两级膨胀颗粒污泥床(EGSB)反应器在微氧条件下处理焦化废水,考察了该工艺对焦化废水中挥发酚、硫氰化物、氰化物和COD的去除效果。研究结果表明,在进水流量为1 L/h,总水力停留时间(HRT)为24 h的条件下,两级EGSB反应器对COD的去除效果较好。稳定运行时,在进水挥发酚为56.8~185.1 mg/L、硫氰化物为287.1~539.9 mg/L、氰化物为0.17~0.72 mg/L的条件下,系统对其平均去除率分别为99.9%、96.8%和82.6%,出水挥发酚和氰化物均能达到《污水综合排放标准(GB8978-1996)》的一级标准。进水COD浓度在1 084~1 880 mg/L之间,平均去除率为76.9%,出水平均浓度为325 mg/L。更多还原

【Abstract】 The EGSB reactor under the micro-aerobic condition was applied for treatment of coking wastewater. The removal efficiencies of volatile phenol,thiocyanate,cyanide and COD were investigated. The results show that the EGSB reactor achieve better removal efficiency of COD when influent flow is 1 L /h and HRT is 24 h. When the influent volatile phenol,thiocyanate and cyanide are 56. 8 ~ 185. 1 mg /L,287. 1 ~ 539. 9 mg /L and 0. 17 ~ 0. 72 mg /L,respectively,the average removal efficiencies of volatile phenol,thiocyanate and cyanide are 99. 9%,96. 8% and 82. 6%. And the effluent volatile phenol and cyanide concentrations accord with the high distinction standard of Integrated Wastewater Discharge Standard( GB8978-1996). When the influent COD concentration is 1 084 ~ 1 880 mg /L,the average COD removal efficiency is 76. 9% and the average COD effluent concentration is 325 mg /L.更多还原