Open AccessBiomass Acclimatization to Sequentially Varying Substrates in an Upflow Anaerobic Sludge Blanket (UASB) Bioreactor
Author(s) -
Yee Ying Jennifer Tan,
Mohd Ali Hashim,
K.B. Ramachandran
Publication year - 2006
Publication title -
water quality research journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 44
eISSN - 2408-9443
pISSN - 1201-3080
DOI - 10.2166/wqrj.2006.047
Subject(s) - bioreactor , blanket , wastewater , biomass (ecology) , pulp and paper industry , hydraulic retention time , biogas , acclimatization , substrate (aquarium) , environmental science , anaerobic exercise , chemistry , anaerobic digestion , waste management , environmental engineering , methane , biology , materials science , ecology , engineering , physiology , organic chemistry , composite material
In this study, an upflow anaerobic sludge blanket (UASB) bioreactor was sequentially subjected to high-strength synthetic, low-strength synthetic and domestic wastewaters. From COD removal data, supported by volumetric loading rate, hydraulic retention time, pH and qualitative biogas production data, it was observed that the biomass in the bioreactor took about twice the time required to acclimatize to a change in substrate characteristics or composition compared to a much more drastic quantitative change, i.e., more than 95% difference, in substrate concentration. As the initial experiment coincided with the bioreactor start-up, it could also be concluded that the feeding regime did not shorten the overall start-up time of a UASB bioreactor meant to treat domestic wastewater, but its eventual success was probably more assured.
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