Enhancing performance of biocarriers facilitated gravity-driven membrane (GDM) reactor for decentralized wastewater treatment : effect of internal recirculation and membrane packing density
| Autor: | Tzyy Haur Chong, Bing Wu, Seonki Lee, Guillaume Olivier Badoux |
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| Přispěvatelé: | School of Civil and Environmental Engineering, Nanyang Environment and Water Research Institute |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Gravity (chemistry)
Environmental Engineering 010504 meteorology & atmospheric sciences Nitrogen Wastewater 010501 environmental sciences 01 natural sciences Nitrogen removal Water Purification Bioreactors Permeate flux Environmental Chemistry Treatment costs Waste Management and Disposal 0105 earth and related environmental sciences Gravity-driven Membrane Chemistry Membranes Artificial Pollution Sphere packing Membrane Chemical engineering Biofilms Sewage treatment Aeration Environmental engineering::Water treatment [Engineering] Decentralized Wastewater Treatment Filtration Gravitation |
| Popis: | This study aims to investigate the effect of internal recirculation and membrane packing density on the performance (water quality, membrane performance, and microbial community) of a biocarriers facilitated gravity-driven membrane (GDM) reactor under intermittent aeration condition. The results revealed that the presence of internal recirculation in the GDM reactors could effectively improve water quality (especially increasing nitrogen removal) and membrane performance (especially reducing cake layer resistance) compared to those without internal recirculation. In addition, compared to a high packing density membrane module (1150 m2/m3), a lower packing density membrane module (290 m2/m3) benefited to improve 15% of nitrogen removal and 44% of permeate flux due to the effective aeration scouring effect and less-limited eukaryotic activity, as well as reduce 20% of total treatment cost. In addition, the presence and absence of internal recirculation could lead to dissimilar microbial community compositions of the biofilms in the GAC layers and on the membrane surfaces. However, the membrane packing density could play an insignificant effect on the microbial community compositions of the biofilms in the GDM reactors with internal recirculation. Economic Development Board (EDB) Accepted version The Economic Development Board (EDB) of Singapore is acknowledged for funding the SingaporeMembrane Technology Centre (SMTC), Nanyang Technological University. The authors express their gratitude to Prof. EberhardMorgenroth at Institute of Environmental Engineering of ETH Zürich (Switzerland) for his advice and support. |
| Databáze: | OpenAIRE |
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