Sugar and molasses optimization during denitrification of aquaculture wastewater in a membrane bioreactor

Monk, J.S., and Jegatheesan, V. (2006) Sugar and molasses optimization during denitrification of aquaculture wastewater in a membrane bioreactor. In: Proceedings of the World Water Congress. From: 5th Biennial World Water Congress, 10-14 SEP 2006, Beijing, China.

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Abstract

This study was undertaken to evaluate the suitability of sugar and molasses to the denitrification of aquaculture wastewater. Following a series of batch experiments sugar was selected as the better performer of the two supplementary carbon sources and was trialled in a 0.4 11m hollow fibre membrane bioreactor. A synthetic aquaculture wastewater containing 50 mg/l nitrate was created to compare the ability of three different carbon source configurations to remove nitrate. It was found that the 4:1 carbon to nitrogen by weight sugar feed was the most effective by removing 75% of nitrate from the synthetic aquaculture wastewater. The two other carbon source mixtures both with carbon to nitrogen ratios of 2:1 were created from sugar and methanol and removed 68% and 70% of the initial nitrate respectively. Transmembrane pressure increase indicated biofilm fouling occurred most rapidly in the 4:1 sugar and 2:1 methanol feeds which were approximately twice as fast as the pressure increase experienced in the 2:1 sugar feed.

Item ID: 4332
Item Type: Conference Item (Refereed Research Paper - E1)
Keywords: aquaculture; denitrification; membrane bioreactor
Date Deposited: 01 Nov 2009 23:01
SEO Codes: 96 ENVIRONMENT > 9609 Land and Water Management > 960999 Land and Water Management of Environments not elsewhere classified @ 100%
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