混合碳源的好氧颗粒污泥培养及其除污效果分析  

Cultivation of aerobic granular sludge with mixed carbon source and its decontamination effect analysis

作　　者：刘前进 刘立凡[1] LIU Qianjin;LIU Lifan(School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学土木与交通工程学院,广州510006

出　　处：《环境工程学报》2021年第3期962-971,共10页Chinese Journal of Environmental Engineering

摘　　要：以葡萄糖和乙酸钠为混合碳源,采用调控耗氧有机污染物浓度(以COD计)、表面上升气速和污泥沉降时间的方法培养好氧颗粒污泥,对污泥颗粒化过程中的污泥特性变化和污染物去除效果进行研究。结果表明:第110天,好氧颗粒污泥培养成功,颗粒粒径主要分布在1.43~2.26 mm,污泥容积指数(SVI30)为28 mL·g^(−1),沉降速度为94 m·h^(−1),污泥挥发组分比例(MLVSS/MLSS)为0.72。通过对胞外聚合物(EPS)含量变化分析可知,在污泥颗粒化过程中,多糖(PS)含量变化不大,基本维持在25 mg·g^(−1),蛋白质(PN)含量明显增加,由13.98 mg·g^(−1)增加到41.86 mg·g^(−1),说明PN对好氧颗粒污泥的形成具有重要作用。好氧颗粒污泥对COD、TN和TP的去除率分别达到95%、80%、70%,具有良好的除污效果。以上研究结果可为好氧颗粒污泥的培养提供参考。Using glucose and sodium acetate as mixed carbon source,aerobic granular sludge was cultivated by adjusting the concentration of aerobic organic pollutants(calculated by COD),surface rising gas velocity and sludge settling time.The changes of sludge characteristics and pollutant removal effect during the sludge granulation process were studied.The results showed that the aerobic granular sludge was successfully cultivated on the 110th day,its particle size was mainly distributed in 1.43~2.26 mm,the sludge volume index(SVI30)was 28 mL·g^(−1),the settling speed was 94 m·h^(−1),and the sludge volatile component ratio(MLVSS/MLSS)was 0.72.The change of extracellular polymeric substances(EPS)content indicated that during the process of sludge granulation,the content of polysaccharides(PS)did not obviously change,which basically maintained at 25 mg·g^(−1),but the content of protein(PN)significantly increased from 13.98 mg·g^(−1) to 41.86 mg·g^(−1),indicating that PN played an important role in the formation of aerobic granular sludge.The removal rates of COD,TN and TP by aerobic granular sludge were 95%,80%and 70%,respectively,which had good decontamination effect.The results of this study can provide some valuable references for aerobic granular sludge cultivation.

关 键 词：好氧颗粒污泥 除污效果 特性 颗粒化 混合碳源 

分 类 号：X703.1[环境科学与工程—环境工程]