膜光生物反应器中利用微藻进行三级废水处理：正向渗透与微滤的比较。
Tertiary wastewater treatment in membrane photobioreactor using microalgae: Comparison of forward osmosis & microfiltration.
机构信息
Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore.
Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore.
出版信息
Bioresour Technol. 2016 Dec;222:448-457. doi: 10.1016/j.biortech.2016.09.124. Epub 2016 Oct 1.
Discharge of wastewater with high nitrogen and phosphorus content is a major cause of eutrophication. In this study, a microfiltration-based membrane photobioreactor (MPBR) and forward osmosis-based osmotic membrane photobioreactor (OMPBR) have been operated with Chlorella vulgaris for continuous tertiary wastewater treatment. Both the bioreactors exhibited good biomass accumulation (over 2g/L), although the OMPBR achieved better nutrients removal due to high rejection properties of the membranes. At 2days HRT, the OMPBR achieved nitrogen and phosphorus removal efficiencies of 86-99% and 100%, respectively, whereas the corresponding values in the MPBR were 48-97% and 46%, respectively. Based on the energy input, the total operating costs for OMPBR were 32-45% higher than that of the MPBR, and filtration cost for OMPBR was 3.5-4.5 folds higher than that of the MPBR. These results indicate that the integration of membrane filtration with photobioreactors is promising in microalgae-based tertiary wastewater treatment.
高氮磷含量废水的排放是水体富营养化的主要原因。本研究采用微滤膜生物反应器（MPBR）和正向渗透膜生物反应器（OMPBR），以普通小球藻为处理对象，连续进行三级废水处理。两种生物反应器均表现出良好的生物质积累（超过 2g/L），但由于膜的高截留性能，OMPBR 实现了更好的养分去除效果。在 2 天 HRT 下，OMPBR 对氮和磷的去除效率分别达到 86-99%和 100%，而 MPBR 的相应值分别为 48-97%和 46%。基于能源投入，OMPBR 的总运行成本比 MPBR 高 32-45%，OMPBR 的过滤成本比 MPBR 高 3.5-4.5 倍。这些结果表明，膜过滤与生物反应器的集成在基于微藻的三级废水处理中具有广阔的应用前景。
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