Transfer behavior of odorous pollutants in wastewater sludge system under typical chemical conditioning processes for dewaterability enhancement

被引：0
作者：
Hongyu Gao
Weijun Zhang
Zhenzhen Song
Xiaofang Yang
Lian Yang
Mengdi Cao
Dongsheng Wang
Guiying Liao
机构：
[1] China University of Geosciences,Faculty of Materials Science and Chemistry
[2] China University of Geosciences,School of Environmental Studies
[3] Research Center for co-Environmental Sciences,State Key Laboratory of Environmental Aquatic Chemistry
[4] Chinese Academy of Sciences,Technology Center
[5] ZhongYang steel Co.,undefined
[6] Ltd,undefined
来源：
Scientific Reports | / 7卷
关键词：
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Chemical conditioning has been used for enhancing wastewater sludge dewaterability for many years, but the characteristics of odorous pollutants emission in sludge conditioning were still unclear. In this work, the transfer behavior of different odorous pollutants between air, liquid and solid phases under typical chemical conditioning processes for high-pressure dewatering was systematically investigated. The results indicated that that besides hydrogen sulfide (H2S) and ammonia (NH3), 21 kinds of volatile organic contaminants (VOCs) were identified and quantified by gas chromatography-mass spectrometry (GC-MS), while the concentrations and composition of odorous pollutants varied greatly for different conditioning processes. VOCs were composed by three main constituents including benzenes, halogeno benzene and hydrocarbons. According to mass balance analysis, about 50% of VOCs adsorbed within sludge extracellular polymeric substances (EPS) fraction. Since EPS was damaged and/or flocculation in different chemical conditioning processes, VOCs distributed in solid phase transformed into liquid phase and then released into air. The discrepancies in mass of odorous pollutants before and after chemical conditioning were likely to be related to chemical conversion under acidification, oxidation and precipitation in the presence of ferric ions.
引用
收藏
相关论文
共 88 条
  • [1] Smet E(1999)The emission of volatile compounds during the aerobic and the combined anaerobic/aerobic composting of biowaste Atmospheric Environment 33 1295-1303
  • [2] Van Langenhove H(2015)A novel tool for odor emission assessment in wastewater treatment plant Desalination and Water Treatment 55 712-717
  • [3] De Bo I(2010)Treatment of unpleasant odors in municipal wastewater treatment plants Water Science and Technology 61 2635-2644
  • [4] Giuliani S(1995)Review of methods of odour control Filtration & Separation 32 147-146
  • [5] Zarra T(2009)Air pollution treatment technology of Municipal Sewage Treatment Plant Environmental Engineering 27 75-78
  • [6] Naddeo V(2008)The stench of the Present Situation and Prospect of wastewater treatment plant Industrial safety and environmental protection 34 45-46
  • [7] Belgiorno V(2011)Relation between malodor, ambient hydrogen sulfide, and health in a community bordering a landfill Environmental research 111 847-852
  • [8] Karageorgos P(2009)The stench of Governance Petrochemical safety and environmental protection technology 25 43-46
  • [9] Mills B(2005)Deodorization design for wastewater treatment plant Water & Wastewater Engineering 31 20-23
  • [10] Liu H(2013)Correlation of physicochemical properties and sludge dewaterability under chemical conditioning using inorganic coagulants Bioresource technology 144 337-343
123456789