Essay on Bois and Filter

4336 Words Dec 6th, 2011 18 Pages
By Tse-Luen Lee B. A. Sc. Civil Engineering University of Toronto, 2000 SUBMITTED TO THE DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF ENGINEERING IN CIVIL AND ENVIRONMENTAL ENGINEERING AT THE MASSACHUSETTS INSTITUTE OF TECHNOLOGY JUNE 2001 © 2001 Tse-Luen Lee. All Rights Reserved The author hereby grants to MIT permission to reproduce and to distribute publicly paper and electronic copies of this thesis document in whole or in part.

Signature of Author: Department of Civil and Environmental Engineering May 11, 2001 Certified by: Susan E. Murcott Lecturer of Civil and Environmental Engineering Thesis Supervisor
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coli. Membrane filtration tests carried out in MIT indicate that the BSF technology is effective at removal of total coliform with an average removal of 99.5% of total coliform in the source water. Based on the effectiveness of the BSF in removing microbial contamination, the author recommends the BSF technology to be adopted on a large scale in Nepal, but only if it is coupled with a monitoring plan to ensure correct construction, operation and maintenance procedures are followed. A monitoring plan is necessary to reduce the fraction of BioSand filters that were not working properly.

Supervised by: Susan E. Murcott Title: Lecturer of Civil and Environmental Engineering 2


Thanks to all the people who have helped me through my graduate career, including the following: Thesis supervisor, Susan Murcott, who offered invaluable advice and guidance all the way from the start of the project till the day this thesis was handed in, and who took time to meticulously read through numerous drafts; Faculty advisor, Dr. Eric Adams, who gave me the flexibility to choose the subjects that stimulate my learning in this institute; The Nepal group a.k.a. Naiad Engineering for making my stay in Nepal unforgettable: Nat, Meghan, Tim, and Jessie; Friends who kept me sane and made living in Cambridge enjoyable: Kirill, Fiona, Shan, Thor, Thomas Moore, Takashi, Shao-Hwei, Anthony,

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