小红门污泥热水解厌氧消化项目运行两周年之回顾
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摘要
小红门热水解厌氧消化系统,是国内首个采用康碧热水解+厌氧消化工艺的大型污泥升级改造工程。通过回顾两年的实际运行情况,全面总结了热水解、厌氧消化、板框脱水的生产和技术指标,并与主要设计值进行对比。热水解处理后的污泥含水率稳定,镜检显示活性污泥破壁效果明显,消化产气量、有机物分解率、板框脱水后泥饼含水率等指标均优于设计指标。沼气品质较好,但厂内利用有限,需进一步考虑沼气的综合利用问题。同时,针对除渣、除砂装置运行效率低,热水解系统稀释水用量较多等问题,提出优化建议。
Xiaohongmen thermal hydrolysis anaerobic digestion system was the first large-scale sludge upgrading project in China which adopted Cambi thermal hydrolysis anaerobic digestion process.By reviewing two years of operation,the operation indexes of project,such as thermal hydrolysis,anaerobic digestion,plate and frame filter,were summarized and compared with the design values. The moisture of sludge treated by thermal hydrolysis was stable and the cell-wall breaking effect was obvious under microscopy. The indexes of digestion gas yield,organic matter decomposition rate and moisture content of cake after dehydration by plate and frame filter were all better than the design indexes. The quality of biogas was good,however,the utilization of biogas plant was limited at present,so the comprehensive utilization of biogas should be further considered. At the same time,the problems in actual operation were summarized,and the optimization suggestions were put forward in view of the low operation efficiency of the slag removal,sand removal devices and the large amount of dilution water in the thermal hydrolysis system.
Xiaohongmen thermal hydrolysis anaerobic digestion system was the first large-scale sludge upgrading project in China which adopted Cambi thermal hydrolysis anaerobic digestion process.By reviewing two years of operation,the operation indexes of project,such as thermal hydrolysis,anaerobic digestion,plate and frame filter,were summarized and compared with the design values. The moisture of sludge treated by thermal hydrolysis was stable and the cell-wall breaking effect was obvious under microscopy. The indexes of digestion gas yield,organic matter decomposition rate and moisture content of cake after dehydration by plate and frame filter were all better than the design indexes. The quality of biogas was good,however,the utilization of biogas plant was limited at present,so the comprehensive utilization of biogas should be further considered. At the same time,the problems in actual operation were summarized,and the optimization suggestions were put forward in view of the low operation efficiency of the slag removal,sand removal devices and the large amount of dilution water in the thermal hydrolysis system.
引文
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[10]王平,黄鸥.热水解厌氧消化在污水处理厂泥区改造中的应用探讨[J].给水排水,2015,41(10):41-45.Wang Ping,Huang Ou.Application of thermal hydrolysis anaerotic digestion in the sludge treatment upgrading project in wastewater treatment plant[J].Water&Wastewater Engineering,2015,41(10):41-45(in Chinese).
[11]晏发春,汪恂,张雷.高温热水解预处理厌氧消化技术实例分析[J].中国给水排水,2016,32(18):35-37.Yan Fachun,Wang Xun,Zhang Lei.Case analysis of anaerobic digestion technology with high temperature thermal hydrolysis[J].China Water&Wastewater,2016,32(18):35-37(in Chinese).
[2]杜强强,戴明华,张晏,等.热水解厌氧消化工艺用于污水厂泥区升级改造[J].中国给水排水,2016,32(22):46-48.Du Qiangqiang,Dai Minghua,Zhang Yan,et al.Anaerobic digestion process of thermal hydrolysis for upgrading and rebuilding of sewage plant mud area[J].China Water&Wastewater,2016,32(22):46-48(in Chinese).
[3]肖本益,阎鸿,魏源送.污泥热处理及其强化污泥厌氧消化的研究进展[J].环境科学学报,2009,29(4):673-682.Xiao Benyi,Yan Hong,Wei Yuansong.State of the art of thermal sludge pretreatment and its enhancement for anaerobic sludge digestion[J].Journal of Environmental Sciences,2009,29(4):673-682(in Chinese).
[4]韩春荣,谢继荣,宋晓雅,等.污水处理厂沼气利用的经济和能源性分析[J].给水排水,2012,48(12):54-57.Han Chunrong,Xie Jirong,Song Xiaoya,et al.Economy and energy analysis of the usage of methane from the wastewater treatment plant[J].Water&Wastewater Engineering,2012,48(12):54-57(in Chinese).
[5]张晓红,李冰,马文瑾,等.温度及热水解对污泥厌氧消化的影响研究[A].2015年中国环境科学学会学术年会论文集[C].北京:中国环境科学学会,2015.Zhang Xiaohong,Li Bing,Ma Wenjin,et al.Effects of temperature and hydrolysis on sludge anaerobic digestion[A].Proceedings of the Annual Meeting of the Chinese Society of Environmental Sciences[C].Beijing:Chinese Society for Environmental Sciences,2015(in Chinese).
[6]宋晓雅,杨向平,王东生.大型污泥厌氧消化系统的启动与运行调控[J].给水排水,2011,37(3):32-34.Song Xiaoya,Yang Xiangping,Wang Dongsheng.Start up and operation of large scale anaerobic sludge digestion system[J].Water&Wastewater Engineering,2011,37(3):32-34(in Chinese).
[7]王社平,赵恩泽,韩芸,等.西安第五污水处理厂污泥消化及沼气利用效果分析[J].中国给水排水,2018,34(9):18-19.Wang Sheping,Zhao Enze,Han Yun,et al.Analysis of sludge anaerobic digestion and biogas utilization in Xi’an No.5 WWTP[J].China Water&Wastewater,2018,34(9):18-19(in Chinese).
[8]陶亚强,李军,Chang Cheinchi.Blue Plains污水处理厂提标改造---后置反硝化、污泥热水解和深层隧道[J].净水技术,2016,35(1):11-15.Tao Yaqiang,Li Jun,Chang Cheinchi.Upgrading reconstruction of Blue Plains wastewater treatment plantpost-denitrification,sludge thermal hydrolysis and deep tunnels[J].Water Purification Technology,2016,35(1):11-15(in Chinese).
[9]Leslie C P,Daigger G T,Henry C.废水生物处理(第2版)[M].张锡辉,刘勇弟,译.北京:化学工业出版社,2003.Leslie C P,Daigger G T,Henry C.Biological Wastewater Treatment(2nd ed)[M].Zhang Xihui,Liu Yongdi,Translation.Beijing:Chemical Industry Press,2003(in Chinese).
[10]王平,黄鸥.热水解厌氧消化在污水处理厂泥区改造中的应用探讨[J].给水排水,2015,41(10):41-45.Wang Ping,Huang Ou.Application of thermal hydrolysis anaerotic digestion in the sludge treatment upgrading project in wastewater treatment plant[J].Water&Wastewater Engineering,2015,41(10):41-45(in Chinese).
[11]晏发春,汪恂,张雷.高温热水解预处理厌氧消化技术实例分析[J].中国给水排水,2016,32(18):35-37.Yan Fachun,Wang Xun,Zhang Lei.Case analysis of anaerobic digestion technology with high temperature thermal hydrolysis[J].China Water&Wastewater,2016,32(18):35-37(in Chinese).