摘要
通过调控SBR的进水COD、曝气量和污泥沉淀时间,对储存于苯酚溶液后的好氧颗粒污泥进行了活性恢复研究,为好氧颗粒污泥活性恢复方法的选择提供参考。结果表明,室温下在60 mg·L^(-1)苯酚溶液中储存150 d的好氧颗粒污泥,经过28 d的培养即可恢复其结构完整性和微生物活性。在活性恢复期间中,好氧颗粒污泥经历了破碎到重塑的演变过程。恢复后的好氧颗粒污泥具有良好的沉降性能,微生物量较大且活性较高,SVI;和SVI;分别为26.1 mL·g^(-1)和27.6 mL·g^(-1),MLSS和MLVSS分别为16 903 mg·L^(-1)和12 001 mg·L^(-1),MLVSS/MLSS为0.71,DHA为71.36μg·(g·h)^(-1)。好氧颗粒污泥的EPS组分在恢复期间不断发生改变,代表酪氨酸/色氨酸类蛋白和芳香族蛋白类物质的荧光强度随颗粒污泥的活性恢复逐渐增强。恢复后的好氧颗粒污泥对COD、TP和TN的去除率分别为97.34%、89.88%和64.37%。
In this study, the activity recovery of the stored aerobic granular sludge was conducted by regulating the influent COD, aeration and sludge settling time of the SBR, which will provide a reference for the selection of aerobic granular sludge activity recovery methods. The results showed that aerobic granular sludge stored in 60 mg·L^(-1)phenol solution for 150 d at room temperature could regain its structural integrity and microbial activity after 28 d of incubation. Aerobic granular sludge underwent an evolutionary process from fragmentation to reconstruction during activity recovery. The recovered aerobic granular sludge had a good settleability, high microbial load and activity, SVI;and SVI;were 26.1 mL·g^(-1)and 27.6 mL·g^(-1), respectively, MLSS and MLVSS were 16 903 and 12 001 mg·L^(-1), respectively, and MLVSS/MLSS was 0.71, and DHA was 71.36 μg·(g·h)^(-1).The EPS fraction of aerobic granular sludge changed continuously during the recovery period, representing a gradual increase in fluorescence intensity of tyrosine/tryptophan-like proteins and aromatic protein-like substances with the recovery of granular sludge activity. The recovered aerobic granular sludge showed 97.34%,89.88% and 64.37% removal of COD, TP and TN, respectively.
作者
刘前进
刘立凡
LIU Qianjin;LIU Lifan(School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China;Shenzhen Water(Group)Co.Ltd.,Shenzhen 518000,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2021年第10期3400-3409,共10页
Chinese Journal of Environmental Engineering
关键词
好氧颗粒污泥
活性恢复
储存
除污效果
苯酚
aerobic granular sludge
activation recovery
storage
decontamination effect
phenol
