摘要
利用活性炭为载体的外循环三相生物流化床,采用厌氧、好氧组合工艺对含染料废水进行处理实验,结果表明:活性炭载体填充量15 g/L为最佳用量,与流化床的流体混合特性吻合;得到最优化处理流程,包括一次性进水厌氧A(总计4 h,其中进水5 min)-好氧O(4 h)-沉淀(1 h)-出水闲置(3 h),周期12 h。COD进水浓度较高时,其去除率89.4%;COD进水浓度较低时,其去除率82.3%;色度去除率接近100%;NH4-N去除率达60%以上,总容积负荷0.052 kg NH4-N/m3.d。为了保证高效的脱色效果,出水闲置阶段不应低于3h。
An external circulating fluidized - bed reactor with activated carbon as the biomass cartier was operated to eliminate the wastewater containing dyestuff using sequential anaerobic and aerobic biodegradation. According with the fluidized - bed mixing characteristics, 15g/L of the activated carbon was appropriate. The optimization process （ total 12h ： anaerobic 4h, aerobic 4h, settle 1 h, effluent 1 h and idle 2h）was achieved as well. For the supports studied, fluidized -bed technology was suitable for pollutants removal present in wastewater with COD, NH4 -N and ehroma removal＇ efficiencies greater than 82. 3% ; 60% and nearly 100%, respectively. And biologic behavior working with volume load was up to 0.052kg NH4 - N/m^3· d. Whereas the guarantee of decolorization, the effluent and idle stage should not be lower than 3h.
出处
《环境科学与管理》
CAS
2009年第11期71-75,共5页
Environmental Science and Management
基金
上海市科委及环保局共同资助项目:OEJG05010
关键词
外循环
生物流化床
脱色
氨氮
external circulation
fluidized bed
decolorization
ammonia nitrogen
