Document Detail

UV disinfection of wastewater effluents for unrestricted irrigation.
MedLine Citation:
PMID:  17037137     Owner:  NLM     Status:  MEDLINE    
Wastewater reuse in arid regions is important for the production of a water resource to be utilised for non-potable purposes and to prevent the environmental transmission of disease-causing agents. This study was conducted to evaluate the effect of water quality on the comparative disinfection efficiency of viruses, bacteria and spores by UV irradiation. Furthermore, the microbial quality of effluent produced by coagulation, high rate filtration (HRF) and either UV irradiation or chlorination was determined. Using low pressure collimated beam, a UV dose of 80 mWs/cm2 was needed to achieve a 3-log10 inactivation of either rotavirus SA-11 or coliphage MS2, whereas over 5-log10 inactivation of E. coli was reached with a dose of only 20 mWs/cm2. B. subtilis inactivation was found to be linear up to a dose of 40 mWs/cm2 and then a tailing up to a UV dose of 120 mWs/cm2 was observed. It is worth noting that effluent turbidity of < 5 NTU did not influence the inactivation efficiency of UV irradiation. Operation of a pilot plant to treat secondary effluent by coagulation, HRF and UV disinfection at a UV dose of 80 mWs/cm2 resulted in the production of high quality effluent in compliance with the Israel standards for unrestricted irrigation (< 10 CFU/100 mL faecal coliform and turbidity of < 5 NTU). Sulphite reducing clostridia (SRC) were found to be more resistant than coliphages and F coliform for UV irradiation. The results of this study indicated that UV disinfection is suitable for the production of effluents for unrestricted irrigation of food crops.
A M Nasser; H Paulman; O Sela; T Ktaitzer; H Cikurel; I Zuckerman; A Meir; A Aharoni; A Adin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Water science and technology : a journal of the International Association on Water Pollution Research     Volume:  54     ISSN:  0273-1223     ISO Abbreviation:  Water Sci. Technol.     Publication Date:  2006  
Date Detail:
Created Date:  2006-10-12     Completed Date:  2006-12-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9879497     Medline TA:  Water Sci Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  83-8     Citation Subset:  IM    
Water Quality Research Laboratory, Ministry of Health, Israel.
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MeSH Terms
Bacteria / radiation effects*
Chlorine / pharmacology
Disinfection / methods
Pilot Projects
Ultraviolet Rays*
Viruses / radiation effects*
Water Microbiology*
Reg. No./Substance:

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