好氧颗粒污泥技术用于味精废水处理的研究

Application of Aerobic Granular Sludge to Monosodium Glutamate Wastewater Treatment

以厌氧颗粒污泥为接种污泥,采用人工模拟废水在SBR反应器内培养好氧颗粒污泥,35 d后颗粒污泥成熟,反应器对COD和NH4+-N的去除率分别高于95%和99%。采用该反应器处理味精废水,当COD、NH4+-N的容积负荷分别为2.4、0.24 kg/(m3.d)时,对COD、NH4+-N和TN的去除率分别在90%、99%和85%左右,且颗粒污泥未出现解体的现象。以厌氧颗粒污泥为接种污泥、味精废水为进水,在与上述相同条件下培养好氧颗粒污泥,经过60 d的培养,反应器内的污泥以絮状污泥为主,该系统对COD、NH4+-N和TN的去除率分别为85%、99%和70%。

Using anaerobic granular sludge as seed sludge, aerobic granular sludge was cultured in the sequencing batch reactor （SBR） fed with synthetic wastewater. After 35 d, mature granular sludge was obtained. The removal rates of COD and ammonia nitrogen were more than 95% and 99% respectively. The reactor was applied to monosodium glutamate wastewater treatment. When the volumetric loading rates of COD and ammonia nitrogen were 2.4 kg/（ m^3 · d） and 0.24 kg/（ m^3 · d） , the removal rates of COD, NH4 -N and TN could reach 90% , 99% and 85% respectively. The disintegration of granular sludge did not occur. Using anaerobic granular sludge as seed sludge and monosodium glutamate wastewater as influent, flocculent sludge was dominant in SBR after 60 d operation. The removal rates of COD, NH4 - N and TN were 85% , 99% and 70% respectively.