New method for efficient control of hydrogen sulfide and methane in gravity sewers:Combination of NaOH and nitrite

作     者：Zicong Zhao Jing Yang Zigeng Zhang Sheping Wang Zhiqiang Zhang Jinsuo Lu Zicong Zhao;Jing Yang;Zigeng Zhang;Sheping Wang;Zhiqiang Zhang;Jinsuo Lu

作者机构：School of Environmental and Municipal EngineeringXi’an University of Architecture and TechnologyXi’an 710055China Xi’an Municipal Engineering Design&Research Institute Co.Ltd.Xi’an 710000China Key Laboratory of Northwest Water ResourcesEnvironment and Ecology(Ministry of Education)Xi’an University of Architecture and TechnologyXi’an 710055China Key Laboratory of Environmental EngineeringXi’an University of Architecture and TechnologyXi’an 710055China 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2022年第16卷第6期

页      面：95-108页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：grateful for the financial support from the National Natural Science Foundation of China(Grant Nos.51778523,52000146) the China Postdoctoral Science Foundation(Grant No.2020M673351) the Key Research and Development Program of Shaanxi Province(grant no.2019ZDLSF06-04) 

主　　题：Sewer corrosion Sulfide control Combination treatment NaOH Nitrite 

摘      要：An innovative treatment method by the combination of NaOH and nitrite is proposed for controlling hydrogen sulfide and methane in gravity sewers and overcome the drawbacks of the conventional single chemical *** reactors simulating gravity sewers were set up to assess the effectiveness of the proposed *** demonstrated hydrogen sulfide and methane reductions of about 96.01%and 91.49%,respectively,by the combined addition of NaOH and *** consumption of NaNO_(2) decreased by 42.90%,and the consumption rate of NaOH also showed a downward *** with a single application of NaNO_(2),the C/N ratio of wastewater was increased to about 0.61 mg COD/mg *** greenhouse effect of intermediate N2O and residual methane was about 48.80 gCO_(2)/m^(3),which is far lower than that of methane without control(260 gCO_(2)/m^(3)).Biofilm was destroyed to prevent it from entering the sewage by the chemical additives,which reduced the biomass and inhibited the recovery of biofilm activity to prolong the control *** sulfide production rate and sulfate reduction rate were reduced by 92.32%and 85.28%,*** with conventional control methods,the cost of this new method was only 3.92×10^(−3)$/m^(3),which is potentially a cost-effective strategy for sulfide and methane control in gravity sewers.