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DOI: https://doi.org/10.4491/eer.2019.285
Removal of nutrients and organic pollutants from domestic wastewater treatment by sponge-based moving bed biofilm reactor
Huynh Tan Nhut, Nguyen Tri Quang Hung, Tran Cong Sac, Nguyen Huynh Khanh Bang, Tran Quang Tri, Nguyen Trung Hiep, and Nguyen Minh Ky
Faculty of Environment and Natural Resources, Nong Lam University of Ho Chi Minh City, Ho Chi Minh City 700000, Vietnam
Corresponding Author: Nguyen Tri Quang Hung ,Tel: +84-3-87220723, Email: quanghungmt@hcmuaf.edu.vn
Received: July 7, 2019;  Accepted: September 3, 2019.
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This study evaluates the efficiency of domestic wastewater treatment via Sponge-Based Moving Bed Biofilm Reactor (S-MBBR). The laboratory-based treatment plan uses polyurethane sponge with a specific surface area was 260 m2/m3 as a carrier. The treatment plan operated under four different organic load rate: OLR1 = 0.4 kg BOD/m3.day; OLR2 = 0.6 kg BOD/m3.day; OLR3 = 0.8 kg BOD/m3.day; and OLR4 = 1.0 kg BOD/m3.day. During 80 d of the experiment, the highest treatment efficiency was at the organic load rate of 0.4 kg BOD/m3.day, with COD, SS, TN and TP were found to be 85.0 ± 12.9%, 85.7 ± 5.3%, 87.2 ± 0.9%, and 40.3 ± 0.2%, respectively. In which, the influent SS concentration were from 117.3 to 126.0 mg/L, the effluent concentration were in ranged 18.0 to 34.22 mg/L, respectively. The values of influent and effluent COD were 298.8 ± 12.88 and 44.8 ± 3.78 mg/L in turn. The OLR1 influent TN, TP concentrations were respectively 47.9 ± 2.11 and 3.6 ± 0.15 mg/L; the effluent TN, TP concentration were 14.9 ± 0.18 and 2.2 ± 0.06 mg/L, respectively. The study suggests that the effluent is within the allowable limits of National technical regulation on domestic wastewater (Column B1), indicating the applicability of S-MBBR for the domestic wastewater treatment plant.
Keywords: Activated sludge | Domestic wastewater | S-MBBR | Sponge
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