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Environmental Engineering Research 2005;10(5): 247-256. DOI: https://doi.org/10.4491/eer.2005.10.5.247
WASTEWATER TREATMENT USING COMBINATION OF MBR EQUIPPED WITH NON-WOVEN FABRIC FILTER AND OYSTER-ZEOLITE COLUMN
Yoo-Jin Jung1, Hyun-Woong Koh2, Won-Tae Shin3, and Nak-Chang Sung4
1Division of TMDL Policy, National Institute of Environmental Research, Incheon, South Korea 404-708
2R&D Center, XX1EN Co., Ltd. Busan, South Korea 604-838
3Marine Environmental Division, Ministry of Marine Affairs and Fisheries Seoul, South Korea 110-793
4Department of Environmental Engineering, Dong-A University Busan, South Korea 604-714
Corresponding Author: Nak-Chang Sung ,Tel: +82-51-200-7681, Fax: +82-51-200-7675, Email: ncsung@donga.ac.kr
Received: March 6, 2005;  Accepted: October 1, 2005.
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ABSTRACT
A combination of the submerged membrane activated-sludge bioreactor(SMABR) equipped with non-woven fabric filter and oyster-zeolite (OZ) packed-bed adsorption column was studied to evaluate the advanced tertiary treatment of nitrogen and phosphorous. The non-woven filter module was submerged in the MBR and aeration was operated intermittently for an optimal wastewater treatment performance. Artificial wastewater with CODtl of 220 mg/L, total nitrogen (T-N) of 45 mg/L, and total phosphorous (T-P) of 6 mg/L was used in this study. MLSS was maintained about 4,000 - 5,000 mg/L throughout the experiments. The experiments were performed for 100-day with periodic non-woven filter washing. The results showed that COD„ could be effectively removed in SMABR alone with over 94% removal efficiency. However, T-N and T-P removal efficiency was slightly lower than expected with SMABR alone. The permeate from SMABR was then passed through the OZ column for tertiary nutrients removal. The final effluent analysis confirmed that nutrients could be additionally removed resulting in over 87% and 46 % removal efficiencies for T-N and T-P, respectively. The results of this study suggest that the waste oyster-shell can be effectively reclaimed as an adsorbent in advanced tertiary wastewater treatment processes in combination with SMABR equipped with non-woven fabric filter.
Keywords: MBR | SMABR | Non-woven fabric filter | Tertiary treatment | Oyster-shell | Zeolite
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