Improved Filtration Technology for Pathogen Reduction in Rural Water Supplies

Water

Valentine Tellen¹  George Nkeng¹ 

[1] University of Buea, P.O. Box 63, South West Region 273, Cameroon

关键词: bio-sand filtration;    zero-valent iron;    microbial reductions;    household drinking water treatment;   

DOI  :  10.3390/w2020285

来源: mdpi

【 摘 要 】

Intermittent bio-sand filtration (BSF) is a low-cost process for improving water quality in rural households. This study addresses its two drawbacks: flow limitations requiring excessive waiting, and inadequate purification when high flows are imposed. Two modifications were examined: increasing the sand’s effective size, and adding zero-valent iron (ZVI) into the media as a disinfectant. After 65 days, percent reductions in total coliform, fecal coliform, and fecal streptococci averaged 98.9% for traditional BSF and 99% for the improved BSF. Both modifications showed statistically significant improvements. Increased sand size and ZVI addition can counter the drawbacks of traditional BSF.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.