用味精生产废水培养好氧颗粒污泥

Cultivation of Aerobic Granular Sludge Using Monosodium Glutamate Production Wastewater

以厌氧颗粒污泥为接种污泥,采用味精生产废水进行培养,在SBR中以逐渐降低污泥沉淀时间的方法成功培养出好氧颗粒污泥。实验结果表明:污泥接种65 d后,出现细小的好氧颗粒污泥,呈黄褐色,95 d后颗粒污泥趋于成熟,粒径达0.6 mm左右,且周围存在大量原生动物;运行95 d后MLSS提高至8.00 g/L,SVI降至30.00 mL/g左右;成熟后的好氧颗粒污泥对味精生产废水中的COD和NH3-N具有良好的去除效果,出水COD和ρ(NH3-N)分别为80 mg/L和2 mg/L左右。

Using anaerobic granular sludge as seeding sludge and monosodium glutamate production wastewater as medium, aerobic granular sludge was cultivated in SBR with gradually shortening sludge sedimentation time. The experimental results show that： After 65 d of cultivation, the aerobic granular sludge with small size and tawny color are observed; After 95 d, the aerobic granular sludge tends to be mature with 0.6 mm of the size and surrounded with a mass of protozoa; At this time, MLSS is increased to 8.00 g/L and SVI is decreased to about 30.00 mL/g; The mature aerobic granular sludge has good effects on removal of COD and NH3-N fron monosodium glutamate production wastewater with about 80 mg/L of effluent COD and 2 mg/L ofp（NH3-N）.