首页|Nanobubbles for the Mitigation of Fouling in Wastewater Distribution Systems

Nanobubbles for the Mitigation of Fouling in Wastewater Distribution Systems

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
The increasing demand for wastewater treatment has become a notable trend for addressing global water scarcity.However,fouling is a significant challenge for wastewater distribution engineering systems.This study provides an approach using nanobubbles(NBs)to control fouling.The antifouling capacities of three types of NBs,six oxygen concentrations,and two application procedures(prevention and removal)are investigated.The results show that NBs effectively mitigate composite fouling-including biofouling,inorganic scaling,and particulate fouling-in comparison with the non-NBs group.More specifically,hydroxyl radicals generated by the self-collapse of NBs oxidize organics and kill microorganisms in wastewater.The negatively charged surfaces of the NBs transform the crystalline form of CaCO3 from cal-cite to looser aragonite,which reduces the likelihood of ion precipitation.Furthermore,the NBs gas-liquid interfaces act as gas"bridges"between colloidal particles,enhancing the removal of particles from wastewater.Lastly,although the NBs inhibit the growth of fouling,they do not significantly remove the already adhered fouling in non-NBs treated groups.This study anticipates that the application of NBs will address the significant fouling issue for various wastewater distribution engineering systems in order to meet the global challenge of sustainable water supplies.

BiofoulingScalingColloidal foulingWastewaterAntifouling mechanism

Yang Xiao、Bo Zhou、Siyuan Tan、Lei Li、Tahir Muhammad、Buchun Si、Changjian Ma、Sunny C.Jiang、Yunkai Li

展开 >

College of Water Resources and Civil Engineering,China Agricultural University,Beijing 100083,China

Engineering Research Center for Agricultural Water-Saving and Water Resources(Ministry of Education of the People's Republic of China),China Agricultural University,Beijing 100083,China

School of Environment and Civil Engineering,Dongguan University of Technology,Dongguan 523808,China

State Key Laboratory of Nutrient Use and Management,Institute of Agricultural Resources and Environment,Shandong Academy of Agricultural Sciences,Jinan 250100,China

Department of Civil and Environmental Engineering,University of California-Irvine,Irvine,CA 92617,USA

展开 >

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Shandong ProvinceNational Key Research and Development Planearmarked fund for CARS-03China Postdoctoral Science FoundationChina Postdoctoral Science FoundationUS National Science FoundationUS National Science FoundationUS National Science FoundationUS Bureau of ReclamationUS Environmental Protection AgencyUS Environmental Protection Agency

5233900452209074ZR2022QE0792021YFD1900900BX20213632022M713394CBET 2027306CBET 2128480CBET 1806066R21AC10079-00EPA-G2021-STAR-A184025701

2024

10.1016/j.eng.2023.10.013

工程(英文)

工程(英文)

CSTPCDEI
ISSN：2095-8099
年,卷(期)：2024.35(4)