Intermittent Sand Filtration Of Secondary Effluent

Author : Kyle Fuller
Publisher :
ISBN 13 : 9781339542546
Total Pages : pages
Book Rating : 4.5/5 (425 download)

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Download or read book Slow Sand Filtration for Disinfection of Secondary Effluent from a Wastewater Treatment Plant written by Kyle Fuller and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Low-cost, reliable disinfection of secondary effluent is needed at wastewater treatment plants in small communities in developing countries to reduce pathogens to a level required for reuse. There is currently a wastewater treatment plant in Sololá, Guatemala that reuses all of the effluent for crop irrigation. The reuse of this wastewater poses a public health risk to the community because the treatment plant lacks disinfection. In treatment plants such as this, a simple, gravity-fed disinfection system is needed. Five pilot scale slow sand filters were tested in three phases to determine the feasibility of slow sand filtration as a disinfection step in small wastewater treatment facilities, as well as to characterize the level of treatment achieved in the process. In the first phase, secondary effluent from the UC Davis treatment plant served as the influent to the sand filters. The time required between maintenance events in Phase 1 ranged from 7 to 114 days. In the second phase, effluent from a pilot scale wastewater treatment system (i.e. a septic tank treating municipal wastewater from UC Davis followed by a plastic-media trickling filter) intended to replicate the treatment system in Sololá was used to feed the sand filters. The third phase focused on investigating the effect of various sand sizes on maintenance frequency and treatment capability. The experimental results indicate that when fed low-turbidity influent water (e.g.