A new sponge tray bioreactor in primary treated sewage effluent treatment |
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| Authors: | Nguyen Tien Thanh Ngo Huu Hao Guo Wenshan Phuntsho Sherub Li Jianxin |
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| Institution: | a Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia
b State Key Laboratory of Hollow Fiber Membrane Materials and Processes, School of Material Science and Chemical Engineering, Tianjin Polytechnic University, Tianjin, 300160, China |
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| Abstract: | The new attached growth sponge tray bioreactor (STB) was evaluated at different operating conditions for removing organics and nutrients from primary treated sewage effluent. This STB was also assessed when using as a pre-treatment prior to micro-filtration (MF) for reducing membrane fouling. At a short hydraulic retention time (HRT) of 40 min, the STB could remove up to 92% of DOC and 40-56% of T-N and T-P at an organic loading rate (OLR) of 2.4 kg COD/m3 sponge day. This OLR is the best for the STB as compared to the OLRs of 0.6, 1.2 and 3.6 kg COD/m3 sponge day. At 28 mL/min of flow velocity (FV), STB achieved the highest efficiencies with 92% of DOC, 87.4% of T-P, and 54.8% of T-N removal. Finally, at the optimal OLR and FV, the STB could remove almost 90% of organic and nutrient, significantly reduce membrane fouling with HRT of only 120 min. |
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| Keywords: | Sponge tray bioreactor Organic and nutrient removal Pre-treatment for micro-filtration Primary treated sewage effluent |
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