Enrichment of less hydrophilic sludge

Hydrophilicity affects the evaporation rate of water from the sludge, and hence the diffusion flux in MDBR. The method to cultivate two sets of microbial consortia with different hydrophilicity was optimized in terms of the COD loading and extractant effectiveness of the selection methods via MAT...

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Bibliographic Details
Main Author: Lai, Shu Ming
Other Authors: Liu Yu
Format: Final Year Project (FYP)
Language:English
Published: 2010
Subjects:
Online Access:http://hdl.handle.net/10356/39628
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author Lai, Shu Ming
author2 Liu Yu
author_facet Liu Yu
Lai, Shu Ming
author_sort Lai, Shu Ming
collection NTU
description Hydrophilicity affects the evaporation rate of water from the sludge, and hence the diffusion flux in MDBR. The method to cultivate two sets of microbial consortia with different hydrophilicity was optimized in terms of the COD loading and extractant effectiveness of the selection methods via MATH adherence percentage and contact angle. It was found that adherence percentage and contact angle increased with number of microbial selection. In addition, Xylene was presumed to be a better extractant than hexadecane for less hydrophilic sludge. The effect of extraction on the extracellular polymeric substance (EPS) was also determined, and it was found that that the ratio of bound proteins to polysaccharide decreased with MATH selection. Furthermore, evaporation test was carried out to determine the effect of sludge hydrophilicity on vapour pressure. Different phases of evaporation process were discussed and higher evaporation rate was observed with less hydrophilic sludge.
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spelling ntu-10356/396282023-03-03T16:55:48Z Enrichment of less hydrophilic sludge Lai, Shu Ming Liu Yu School of Civil and Environmental Engineering Singapore Membrane Technology Centre DRNTU::Engineering::Environmental engineering Hydrophilicity affects the evaporation rate of water from the sludge, and hence the diffusion flux in MDBR. The method to cultivate two sets of microbial consortia with different hydrophilicity was optimized in terms of the COD loading and extractant effectiveness of the selection methods via MATH adherence percentage and contact angle. It was found that adherence percentage and contact angle increased with number of microbial selection. In addition, Xylene was presumed to be a better extractant than hexadecane for less hydrophilic sludge. The effect of extraction on the extracellular polymeric substance (EPS) was also determined, and it was found that that the ratio of bound proteins to polysaccharide decreased with MATH selection. Furthermore, evaporation test was carried out to determine the effect of sludge hydrophilicity on vapour pressure. Different phases of evaporation process were discussed and higher evaporation rate was observed with less hydrophilic sludge. Bachelor of Engineering (Environmental Engineering) 2010-06-01T09:27:33Z 2010-06-01T09:27:33Z 2010 2010 Final Year Project (FYP) http://hdl.handle.net/10356/39628 en Nanyang Technological University 62 p. application/pdf
spellingShingle DRNTU::Engineering::Environmental engineering
Lai, Shu Ming
Enrichment of less hydrophilic sludge
title Enrichment of less hydrophilic sludge
title_full Enrichment of less hydrophilic sludge
title_fullStr Enrichment of less hydrophilic sludge
title_full_unstemmed Enrichment of less hydrophilic sludge
title_short Enrichment of less hydrophilic sludge
title_sort enrichment of less hydrophilic sludge
topic DRNTU::Engineering::Environmental engineering
url http://hdl.handle.net/10356/39628
work_keys_str_mv AT laishuming enrichmentoflesshydrophilicsludge