DOI: 10.1016/j.watres.2018.04.059
Scopus记录号: 2-s2.0-85047442255
论文题名: Stormwater disinfection using electrochemical oxidation: A feasibility investigation
作者: Feng W. ; McCarthy D.T. ; Wang Z. ; Zhang X. ; Deletic A.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 140 起始页码: 301
结束页码: 310
语种: 英语
英文关键词: Disinfection
; Electrochemical oxidation
; Stormwater harvesting
英文摘要: Electrochemical oxidation (ECO) has shown good potential for disinfection of wastewater discharges but has not been tested for stormwater. Due to far lower salinity and chloride levels present in stormwater than in wastewaters, the knowledge so far on the ECO disinfection performance cannot simply be used for stormwater applications. This paper presents the first study on the feasibility of ECO technology for disinfection of pre-treated stormwater. Disinfection performance of E. coli was tested using a dimensional stable anode (DSA) in a series of batch experiments with synthetic stormwater of ‘typical’ chemical and microbial composition. The results showed that effective disinfection could be achieved with very low energy consumption; e.g. the current density of 1.74 mA/cm2 achieved total disinfection in 1.3 min, using only 0.018 kWh per ton of stormwater treatment. Chlorination was found to be the key disinfection mechanism, despite the synthetic stormwater containing only 9 mg/L of chloride. Real stormwater collected from three stormwater treatment systems in Melbourne was then used to validate the findings for indigenous microbe species. Disinfection below the detection limit was achieved for stormwater from the two sites where chloride levels were 9 and 200 mg/l, respectively, but not for the third site where stormwater contained only 2 mg/L chloride. Unfortunately, deterioration of the DSA anode was observed after only 8–10 h of its cumulative operation time, very likely due to high voltage that had to be applied to low saline stormwater to achieve the required current density. In conclusion, ECO was found to be a very promising low energy disinfection technology for stormwater, but far more work is needed to optimise the technology for unique stormwater conditions. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112703
Appears in Collections: 气候减缓与适应
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作者单位: Environmental and Public Health Microbiology Laboratory (EPHM Lab), Monash Infrastructure Research Institute, Department of Civil Engineering, Monash UniversityVIC 3800, Australia; Department of Chemical Engineering, Monash UniversityVIC 3800, Australia; School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW 2052, Australia
Recommended Citation:
Feng W.,McCarthy D.T.,Wang Z.,et al. Stormwater disinfection using electrochemical oxidation: A feasibility investigation[J]. Water Research,2018-01-01,140