微米Fe_3O_4磁粉调理-压力电场污泥脱水工艺过程研究
详细信息 查看官网全文
- 论文作者：钱旭 ; 王毅力 ; 赵丽
- 年：2016
- 作者机构：北京林业大学环境科学与工程学院北京市污染水体源控制技术重点实验室;
- 论文关键词：活性污泥 ; 微米Fe3O4磁粉调理 ; 脱水效果 ; 能耗 ; 接触能
- 会议召开时间：2016-12-14
- 会议录名称：2016全国水环境污染控制与生态修复技术高级研讨会论文集
- 语种：中文
- 分类号：X703
- 学会代码：HJKP
- 会议名称：2016全国水环境污染控制与生态修复技术高级研讨会
- 会议地点：中国云南腾冲
- 主办单位：中国环境科学学会、中国环境科学研究院
- 学会名称：中国环境科学学会
- 页数：7
- 文件大小：1271k
- 原文格式：D
- 会议级别：全国
摘要
研究了微米Fe_3O_4磁粉调理污泥的投加量的优化以及微米磁粉调理-压力电场污泥脱水工艺(MPEOD)的操作参数(电场作用时间、机械压力、电压)对脱水效果和能耗的影响,分析了磁化调理后污泥上清液、污泥絮体理化性质及接触能变化特征。结果表明,微米Fe_3O_4磁粉最佳调理投加量为0.15g·g~(-1);结合能耗与脱水效果,电场作用时间、电压和机械压力分别确定为2h、30V~50V和400~600k Pa。当MPEOD工艺的机械压力、电场作用时间和电压分别为400kPa、2h和50V时,污泥含水率由初始的99.18%降低至44.46%,水分脱除率和污泥减量化分别可达99.34%和98.30%,相应的能耗仅为0.0133k W·h·kg~(-1)。微米磁粉调理污泥时,絮凝作用机制的影响很小,污泥脱水性能得到提高的主要原因是微米磁粉大大降低了污泥颗粒间的路易斯酸碱作用,致使污泥絮体聚集,絮体间孔径增大,利于脱水。较之经典的DLVO理论,扩展后的EDLVO理论能准确描述污泥颗粒的凝聚及分散行为。
引文
[1]戴晓虎.我国城镇污泥处理处置现状及思考[J].给水排水,2012,38(2):1-5.
[2]Mahmoud A,Olivier J,Vaxelaire J,et al.Electrical field:a historical review of its application and contributions in wastewater sludge dewatering[J].Water Research,2010,44(8):2381-2407.
[3]Mahmoud A,Olivier J,Vaxelaire J,et al.Electro-dewatering of wastewater sludge:influence of the operating conditions and their interactions effects[J].Water Research,2011,45:2795-2810.
[4]Tuan P A,Sillanpa¨a¨M,Isosaari P.Sewage sludge electro-dewatering treatment-A Review[J].Drying Technology,2012,30:691-706.
[5]Kuh S E,Kim D S.Effects of surface chemical and electrochemical factors on the dewatering characteristics of fine particle slurry[J].Journal of Environmental Science and Health,2004,39(8):2157~2182.
[6]Grant C S,Matteson M J,Clayfield E J.Surfactant-enhanced electroosmotic dewatering of mineral ultrafines[J].Separation Science and Technology,1991,26(6):773~802.
[7]马德刚,张书廷,季民,等.污泥电渗透脱水操作条件的优化研究[J].中国给水排水,2005,21(5):36-38.
[8]源亮君.磁性物质调理污泥及其机理研究[D].广东:广东工业大学,2007.
[9]Lakshmanan R,Rajarao G K.Effective water content reduction in sewage wastewater sludge using magnetic nanoparticles[J].Bioresource Technology,2014,153:333-339.
[10]Ni S Q,Ni J Y,Yang N,et al.Effect of magnetic nanoparticles on the performance of activated sludge treatment system[J].Bioresource Technology,2013,143:555-561.
[11]Liu X M,Sheng G P,Luo H W,et al.Contribution of extracellular polymeric substances(EPS)to the sludge aggregation[J].Environment Science and Technology,2010,44:4355-4360.
[12]国家环境保护总局.水和废水监测分析方法[M].(第四版).北京:中国环境科学出版社,2002.
[13]Hoek E M V,Agarwal G K.Extended DLVO interactions between spherical particles and rough surfaces[J].Journal of Colloid and Interface Science,2006,298:50-58.
[14]周正,边炳鑫,李帅.磁化处理对活性污泥胶体颗粒表面的zeta电位的影响[J].环境污染与防治,2007,29(3):174-177.
[15]Feng J,Wang Y L,Ji X Y.Dynamic changes in the characteristics and components of activatedsludge and filtrate during the pressurized electro-osmotic dewateringprocess[J].Separation and Purification Technology,2014,134:1-11.
[2]Mahmoud A,Olivier J,Vaxelaire J,et al.Electrical field:a historical review of its application and contributions in wastewater sludge dewatering[J].Water Research,2010,44(8):2381-2407.
[3]Mahmoud A,Olivier J,Vaxelaire J,et al.Electro-dewatering of wastewater sludge:influence of the operating conditions and their interactions effects[J].Water Research,2011,45:2795-2810.
[4]Tuan P A,Sillanpa¨a¨M,Isosaari P.Sewage sludge electro-dewatering treatment-A Review[J].Drying Technology,2012,30:691-706.
[5]Kuh S E,Kim D S.Effects of surface chemical and electrochemical factors on the dewatering characteristics of fine particle slurry[J].Journal of Environmental Science and Health,2004,39(8):2157~2182.
[6]Grant C S,Matteson M J,Clayfield E J.Surfactant-enhanced electroosmotic dewatering of mineral ultrafines[J].Separation Science and Technology,1991,26(6):773~802.
[7]马德刚,张书廷,季民,等.污泥电渗透脱水操作条件的优化研究[J].中国给水排水,2005,21(5):36-38.
[8]源亮君.磁性物质调理污泥及其机理研究[D].广东:广东工业大学,2007.
[9]Lakshmanan R,Rajarao G K.Effective water content reduction in sewage wastewater sludge using magnetic nanoparticles[J].Bioresource Technology,2014,153:333-339.
[10]Ni S Q,Ni J Y,Yang N,et al.Effect of magnetic nanoparticles on the performance of activated sludge treatment system[J].Bioresource Technology,2013,143:555-561.
[11]Liu X M,Sheng G P,Luo H W,et al.Contribution of extracellular polymeric substances(EPS)to the sludge aggregation[J].Environment Science and Technology,2010,44:4355-4360.
[12]国家环境保护总局.水和废水监测分析方法[M].(第四版).北京:中国环境科学出版社,2002.
[13]Hoek E M V,Agarwal G K.Extended DLVO interactions between spherical particles and rough surfaces[J].Journal of Colloid and Interface Science,2006,298:50-58.
[14]周正,边炳鑫,李帅.磁化处理对活性污泥胶体颗粒表面的zeta电位的影响[J].环境污染与防治,2007,29(3):174-177.
[15]Feng J,Wang Y L,Ji X Y.Dynamic changes in the characteristics and components of activatedsludge and filtrate during the pressurized electro-osmotic dewateringprocess[J].Separation and Purification Technology,2014,134:1-11.