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Proof of concept of removal of carbon and nitrogen from wastewater through a novel process of biofilm SND

Hossain, M.I., Cheng, L., Flavigny, R.M.G. and Cord-Ruwisch, R. (2017) Proof of concept of removal of carbon and nitrogen from wastewater through a novel process of biofilm SND. Frontiers in Wastewater Treatment and Modelling, 4 . pp. 518-522.

Link to Published Version: https://doi.org/10.1007/978-3-319-58421-8_81
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Abstract

A novel biofilm reactor is invented to remove carbon and nitrogen from wastewater with low energy consumption. This biofilm reactor contains glycogen accumulating organism (GAO) biofilm, zeolite powder and ammonium oxidizing bacteria (AOB) biofilm. Under anaerobic condition for 24 h, this unique biofilm structure enabled a removal of carbon and nitrogen from wastewater via PHBs/PHAs microbial synthetic pathway and ammonium physical adsorption on zeolite. After draining out the wastewater, the biofilm reactor was subjected to passive aeration for 24 h so that the adsorbed ammonium was oxidised by the AOB biofilm and the produced nitrite and nitrate were reduced by the GAO biofilm through denitrification using the stored PHBs/PHAs as electron donor. This simultaneous nitrification and denitrification, which was evident by a net production of nitrogen gas, led to regeneration of zeolite and GAO. Removal efficiencies were >99% for C and >80% for N. SND in air can be explained to be due to an oxygen gradient formed in the biofilm.

Publication Type: Journal Article
Murdoch Affiliation: School of Engineering and Information Technology
Publisher: Springer
Copyright: © Springer International Publishing AG 2017
URI: http://researchrepository.murdoch.edu.au/id/eprint/40898
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