Ding Meiyue, Wang Chuansheng, Woo Bae Sung, Yong Ng How
Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore; National University of Singapore Environmental Research Institute, 5A Engineering Drive 1, 117411, Singapore.
Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore.
Bioresour Technol. 2022 Nov;364:128120. doi: 10.1016/j.biortech.2022.128120. Epub 2022 Oct 13.
This study investigated the nutrient removal, decarbonization potentials, and bioenergy production (i.e., algal biomass and biogas) between a membrane photobioreactor (MPBR) and a sequencing photobioreactor (SPBR) as the post-treatment process of an anaerobic membrane bioreactor (AnMBR) for municipal wastewater treatment. All photobioreactors without aeration showed favourable performance on AnMBR effluent polishing and bioenergy production. In comparison, MPBRs achieved higher removal efficiencies with 98.4 %-99.1 % NH-N and 74.8 %-88.4 % PO-P removal compared to the SPBRs with 41.1 %-82.0 % NH-N and 39.6 %-72.9 % PO-P removal. MPBRs enhanced more nutrient utilization (24.9-49.3 g(N)/(m·d) and 3.4-8.1 g(P)/(m·d)) and CO assimilation (22.9-43.4 g(C)/(m·d)), and concentrated more microalgae with 1.58-1.98 g/L higher than the SPBRs. Moreover, the MPBR effectively upgraded the biogas from AnMBR with superior methane percentage of 89.4 %-93.4 % due to its better CO biofixation. The MPBR, with better carbon, nitrogen and phosphorous removal and bioenergy production, following AnMBR is an attractive decarbonized technology for future sustainable wastewater treatment.
本研究调查了作为城市污水处理厌氧膜生物反应器（AnMBR）后处理工艺的膜光生物反应器（MPBR）和序批式光生物反应器（SPBR）之间的养分去除、脱碳潜力和生物能源生产（即藻类生物质和沼气）。所有无曝气的光生物反应器在AnMBR出水净化和生物能源生产方面均表现出良好性能。相比之下，MPBR的去除效率更高，NH-N去除率为98.4%-99.1%，PO-P去除率为74.8%-88.4%，而SPBR的NH-N去除率为41.1%-82.0%，PO-P去除率为39.6%-72.9%。MPBR提高了更多的养分利用率（24.9-49.3 g(N)/(m·d)和3.4-8.1 g(P)/(m·d)）和CO同化率（22.9-43.4 g(C)/(m·d)），并且浓缩的微藻比SPBR多1.58-1.98 g/L。此外，由于MPBR具有更好的CO生物固定作用，它有效地提升了AnMBR产生的沼气，甲烷含量高达89.4%-93.4%。MPBR在AnMBR之后，具有更好的碳、氮和磷去除能力以及生物能源生产能力，是未来可持续污水处理中一种有吸引力的脱碳技术。
