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Environmental Engineering Research 2012;17(2): 59-63. DOI: https://doi.org/10.4491/eer.2012.17.2.059
Advanced Treatment of Wastewater from Food Waste Disposer in Modified Ludzack-Ettinger Type Membrane Bioreactor
Jae Woo Lee1, Warangkana Jutidamrongphan2, Ki Young Park2, Seheum Moon3, and Chul Park4
1Department of Environmental Engineering, Korea University, Yeongi-gun 339-800, Korea
2Department of Civil and Environmental System Engineering, Konkuk University, Seoul 143-701, Korea
3Samsung C&T, Seoul 137-857, Korea
4Department of Civil and Environmental Engineering, University of Massachusetts Amherst, MA 01003, USA
Corresponding Author: Ki Young Park ,Tel: +82-2-450-3736, Fax: +82-2-447-3637, Email: kypark@konkuk.ac.kr
Received: February 6, 2012;  Accepted: March 9, 2012.
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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.
Keywords: Disposer | Food waste | Membrane bioreactor | Modified Ludzack-Ettinger process | Wastewater treatment
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