DOI: 10.1016/j.watres.2019.01.006
Scopus记录号: 2-s2.0-85060467462
论文题名: Application of a novel, continuous-feeding ultraviolet light emitting diode (UV-LED) system to disinfect domestic wastewater for discharge or agricultural reuse
作者: Nguyen T.M.H. ; Suwan P. ; Koottatep T. ; Beck S.E.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 53
结束页码: 62
语种: 英语
英文关键词: Decentralized
; Domestic wastewater
; Flow-through
; Fouling
; UV-LEDs
; Water reuse
Scopus关键词: Crops
; Developing countries
; Disinfection
; Effluents
; Fouling
; Inorganic compounds
; Sanitation
; Ultraviolet radiation
; Wastewater reclamation
; Water conservation
; Decentralized
; Domestic wastewater
; Flowthrough
; UV LEDs
; Water reuse
; Wastewater treatment
; citric acid
; inorganic compound
; organic matter
; citric acid
; concentration (composition)
; disinfection
; equipment
; equipment component
; experimental study
; fouling
; inorganic compound
; operations technology
; organic matter
; private sector
; public sector
; sanitation
; ultraviolet radiation
; wastewater
; wastewater treatment
; agricultural management
; agricultural waste
; Article
; biofouling
; crop production
; disinfection
; domestic waste
; flow measurement
; flow rate
; food processing waste
; priority journal
; turbidity
; ultraviolet radiation
; waste water recycling
英文摘要: In many low-income countries, the poor conditions of sanitation systems have been a significant cause of mortality since they accelerate waterborne disease transmission. Developing sanitation systems in these countries is a pressing concern in both the public and private sectors. This research investigated a decentralized domestic wastewater treatment system using ultraviolet light-emitting diodes (UV-LEDs). Although UV-LED disinfection has become more widespread in recent years, it is a novel approach for domestic wastewater treatment. Domestic wastewater was pretreated by a low-cost pretreatment system with an inclined settler and a sand filter prior to feeding a novel flow-through UV LED reactor. At an inlet flow rate of 30 L/h, the COD, TSS, and turbidity of the effluent were 17.7 mg/L, 3.0 mg/L, and 3.9 NTU, respectively. UV transmittance at 285 nm was enhanced from 29.1% to 70.4%, improving the influent quality for UV LED disinfection. The flow-through UV LED reactor was operated at various flow rates from 10 to 50 mL/min, resulting in applied UV doses of 69.4 to 47.8 mJ/cm 2 respectively. These doses are sufficient for inactivating total coliforms in the wastewater to meet the water reuse guidelines for agriculture for both processed food crops and non-food crops. Fouling, which was observed starting at 2 d of operation, decreased the disinfection efficacy to 27% after 25 days of continuous operation. Of the fouling layer, 67% was attributed to organic matter, in contrast to previous fouling studies with mercury UV lamps in which the fouling layer consisted primarily of inorganic compounds. The fouling was reversed by off-line citric acid cleaning for 4 h after every 400 h of continuous operation. © 2019 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/121996
Appears in Collections: 气候变化事实与影响
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作者单位: Environmental Engineering and Management Program, School of Environment, Resources and Development, Asian Institute of Technology, P.O. Box 4, Khlong Luang, Pathumthani 12120, Thailand; Department of Environmental Microbiology, Eawag: Swiss Federal Institute of Aquatic Science and Technology, Dubendorf, 8600, Switzerland
Recommended Citation:
Nguyen T.M.H.,Suwan P.,Koottatep T.,et al. Application of a novel, continuous-feeding ultraviolet light emitting diode (UV-LED) system to disinfect domestic wastewater for discharge or agricultural reuse[J]. Water Research,2019-01-01