Tertiary treatment and dual disinfection to improve microbial quality of reclaimed water for potable and non-potable reuse: A case study of facilities in North Carolina

The Science of the Total Environment
Emily S BaileyMark D Sobsey

Abstract

Treated wastewater is increasingly of interest for either nonpotable purposes, such as agriculture and industrial use, or as source water for drinking water supplies; however, this type of advanced treatment for water supply is not always possible for many low resource settings. As an alternative, multiple barriers of physical, chemical and biological treatment with lower cost and simpler operation and maintenance have been proposed as more globally applicable. One such water reclamation system for both non-potable and potable reuse, is that approved by the State of North Carolina "for Type 2" reclaimed water (NCT2RW). NC Type 2 potable reuse systems consist of a sequence of tertiary treatment to produce well oxidized reclaimed water that is then then further treated by two steps of disinfection, typically UV radiation and chlorination. In this case study, the log10 microbial reduction performance of NCT2RW producing water reclamation facilities is evaluated. Based on the results presented here, NCT2RW consistently achieved high (6 for bacteria, 4 for virus and 4 for protozoan parasite surrogates) log10 reductions using the NC proposed treatment methods. Additionally, lower but significant log10 reduction performance was also d...Continue Reading

References

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May 14, 2014·Journal of Virological Methods·Patsy M PolstonMark D Sobsey
Oct 1, 2014·Journal of Colloid and Interface Science·Christelle DikaChristophe Gantzer

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Citations

Mar 23, 2019·Indian Journal of Ophthalmology·Sonam YangzesJagat Ram
Aug 15, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Huijuan SunYang Liu
Jun 27, 2019·Scientific Reports·Claudia CamposEliana Riaño
Aug 20, 2019·The Science of the Total Environment·Leon KapetasDuncan McNicholl

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