A promising practice to reclaim treated wastewater for reuse: Chemical disinfection followed by natural systems

The purpose of the current study is to compare the inactivation of Escherichia coli in wastewater effluents using conven tional treatments (chlorination) and advanced oxidation processes (AOPs) such as UV irradiation, hydrogen peroxide (H20 2)/solar irradiation, and photo-Fenton processes. In addition, an analysis of the operational costs of each treatment is carried out taking into account the optimal dosages of chemicals used. Total inactivation of bacteria (7.5 log) was achieved by means of chlorination and UV irradiation. However, bacterial regrowth was observed 6 hours after the completion of UV treatment, obtaining a disinfection value around 3 to 4 log. On the other hand, the combination H20 2/solar irradiation achieved a maximum inactivation of £. coli of 3.30 ± 0.35 log. The photo-Fenton reaction achieved a level of inactivation of 4.87 ± 0.10 log. The order of disinfection, taking into account the reagent/cost ratio of each treatment, is as follows: chlorination > UV irradiation > photo-Fenton > H20 2/ sunlight irradiation. Water Environ. Res., 87, 281 (2015).

Section: Resultsmentioning

confidence: 99%

Conventional and Advanced Oxidation Processes Used in Disinfection of Treated Urban Wastewater

Rodríguez-Chueca¹,

Ormad²,

Mosteo³

et al. 2015

“…Mansell et al (2009) coli strains over the UV dose range tested. Verlicchi et al (2009) conducted a pilot study on a two-stage disinfection system to evaluate the possibility of producing an effluent adequate for agricultural use. The disinfection consisted of mild chlorination followed by filtration through a horizontal subsurface flow bed.…”

Section: Disinfection Methodsmentioning

confidence: 99%

Disinfection and Antimicrobial Processes

Vu¹,

Kuo²

2010

“…A wastewater treatment process consisting of chlorine disinfection and filtration through a horizontal subsurface flow bed was evaluated at pilot scale (Verlicchi et al, 2009). Although the filter was found to have a short run time, effluents were suitable for reuse in agricultural applications.…”

Section: Watermentioning

confidence: 99%

Water Reclamation and Reuse

Follett¹,

Lee²,

Schmidt³

et al. 2010

A review of the literature published in 2009 on topics relating to water reclamation and reuse is presented. This review is divided into the following sections: (1) General: extent of reuse, research needs, guidelines and monitoring, and health effects, (2) Treatment technologies: integrated process design, electrodialysis/electrodeionization, membrane treatment, wetlands, bioremediation, industrial wastewater treatment, disinfection, and (3) Planning and Management: public acceptance & education, economics and pricing, water quality planning and management and project/case studies.