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Advanced treatment of wastewater from food waste disposer in modified Ludzack-Ettinger type membrane bioreactor

TitleAdvanced treatment of wastewater from food waste disposer in modified Ludzack-Ettinger type membrane bioreactor
Publication TypeJournal Article
Year of Publication2012
AuthorsLee JWoo, Jutidamrongphan W, Park KYoung, Moon S, Park C
JournalEnvironmental Engineering Research
Volume17
Issue2
Start Page59
Pagination59-63
Date Published06/2012
KeywordsDisposer, Food waste, Membrane bioreactor, Modified Ludzack-Ettinger process, Wastewater Treatment
Abstract

This paper proposes a modified Ludzack-Ettinger (MLE) type membrane bioreactor (MBR) as a method of treatment for wastewater from food waste disposer. Micro-membrane filtration allows for an extremely low concentration of suspended solids in the effluent. The effluent of the reactor in question is characterized by a relatively high level of non-biodegradable organics, containing a substantial amount of soluble microbial products and biomass. Results obtained in this paper by measurement of membrane fouling are consistent with biomass concentration in the reactor, as opposed to chemical oxygen demand (COD). The MLE process is shown to be effective for the treatment of wastewater with a high COD/N ratio of 20, resulting in are markedly high total nitrogen removal efficiency. Denitrification could be improved at a higher internal recycle ratio. Despite the low concentration of influent phosphorus, the phosphorus concentration of the outflow is seen to be relatively high. This is because outflow phosphorous concentration is related to COD consumption, and the process operates at along solids retention time.

DOI10.4491/eer.2012.17.2.059