Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/37725
Title: STUDY OF QUICK START-UP STRATEGIES FOR AN ULTRA-COMPACT BIOFILM REACTOR (UCBR) TREATING DOMESTIC WASTEWATER
Authors: KOH LEE CHEW
Keywords: wastewater, ultra, compact, biofilm, reactor, quick
Issue Date: 16-Jul-2012
Source: KOH LEE CHEW (2012-07-16). STUDY OF QUICK START-UP STRATEGIES FOR AN ULTRA-COMPACT BIOFILM REACTOR (UCBR) TREATING DOMESTIC WASTEWATER. ScholarBank@NUS Repository.
Abstract: An Ultra-Compact Biofilm Reactor (UCBR) is capable of treating domestic wastewater at a short HRT of less than 2 hours. However, the long start-up time needed for biofilm formation is a major drawback for its full-scale application. Hence, this study aims to develop seed organisms to enhance biofilm formation and to establish a quick start-up strategy for UCBR to treat domestic wastewater. To achieve this objective, domestic wastewater treatment and growing biofilm on bare sand carriers in a 5.4-L UCBR were carried out. Return activated sludge from a local water reclamation plant was used to inoculate the bare sand. Seed from the 5.4-L UCBR was successfully used to inoculate a 2-L UCBR. Start-up strategies were studied using different feed substrate conditions on the 2-L UCBR. There were 5 phases to the study. The 5 phases were (I) 100% DWW without pH control, (II) 100% DWW with pH control, (III) 25% SWW blended with 75% Domestic wastewater with pH control, (IV) 50% SWW blended with 50% DWW with pH control and (V) 100% SWW with pH control. In Phases I and II, pH control was shown to improve the nitrification efficiency. pH control was subsequently applied to Phases III to V.
URI: http://scholarbank.nus.edu.sg/handle/10635/37725
Appears in Collections:Ph.D Theses (Open)

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