高时变化系数下某小城镇污水厂的沉淀池改造

发布时间：2018-01-15 01:35

本文关键词：高时变化系数下某小城镇污水厂的沉淀池改造　出处：《中国给水排水》2016年13期 　论文类型：期刊论文

【摘要】：结合某小城镇污水处理厂,探讨了在高时变化系数下,通过在曝气池和沉淀池之间安装虹吸管来降低沉淀池水力波动的办法。监测了改造前后沉淀池和曝气池的水力特性变化及曝气池污泥的呼吸特征。结果表明:改造将沉淀池的水力停留时间(HRTs)波动范围由2.2~6.3 h缩短为2.7~4 h,沉淀池表面负荷波动范围由0.5~1.4 m~3/(m~2·h)变为0.8~1.1 m~3/(m~2.h);改造后,曝气池的水力停留时间(HRT_A)由9.6~26.5 h变为11.5~18 h。曝气池污泥呼吸特性表明,改造后的污泥更为稳定;自养菌比呼吸速率从改造前的(2.9±1.2)mgO_2/(gVSS.h)变为改造后的(3.7±1.3)mgO_2/(gVSS·h),提高了约27%;异养菌平均比呼吸速率与改造前相同,为4.7mgO_2/(gVSS·h),但其波动范围由改造前的2.4~8.5 mgO_2/(gVSS·h)缩小为3.8~5.5 mgO_2/(gVSS·h)。
[Abstract]:With a small town sewage treatment plant, discusses the high coefficient of variation, to reduce sedimentation tank hydraulic fluctuation way through the installation of the rainbow Straw between the aeration tank and the sedimentation tank. The characteristics of the hydraulic characteristics and changes of aeration tank sludge sedimentation and aeration tank breathing before and after the transformation of monitoring. The results show that the hydraulic fracturing will precipitate cell residence time (HRTs) shortened by 2.2~6.3 h range is 2.7~4 h, sedimentation tank surface load fluctuation range from 0.5~1.4 m~3/ (m~2 h) to 0.8~1.1 m~3/ (m~2.h); after the transformation, the hydraulic retention time of aeration tank (HRT_A) by 9.6~26.5 h to show that the respiratory characteristics of sludge in H. aeration tank 11.5~18 after the transformation, the sludge is more stable than autotrophic respiration rate; from the transformation of the former (2.9 + 1.2) mgO_2/ (gVSS.h) is modified (3.7 + 1.3) mgO_2/ (gVSS - H), increased by about 27%; the average ratio of heterotrophic respiration rate and the transformation of the same For 4.7mgO_2/ (gVSS. H), its fluctuation range is reduced to 3.8~5.5 mgO_2/ (gVSS. H) from the 2.4~8.5 mgO_2/ (gVSS. H) before the transformation.

【作者单位】：西安建筑科技大学环境与市政工程学院西北水资源与环境生态教育部重点实验室;
【基金】：陕西省建设厅科技发展计划项目(2015-K63) 2013年博士点基金联合资助课题(20136120110002)
【分类号】：X703
【正文快照】： 沉淀池是活性污泥法处理的重要环节,沉淀池的稳定运行对污水处理厂的安全稳定运行有重要意义[1]。某小城镇污水处理厂因进水时变化系数(心)大导致沉淀池水力条件变化大,运行不稳定,其水力停留时间(HRTS)日变化范围为2.2~6.3 h,表面负荷波动范围为0.5~1.4 m3/(m2?h)。考虑到生

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