Contribution of chemical precipitation to the membrane fouling in a high-solids type anaerobic membrane bioreactor treating OFMSW leachate

Wu, Zhiyue; Qiao, Wei; Liu, Yuan; Yao, Junqiang; Gu, Chen; Zheng, Xiaoyu; Dong, Renjie

doi:10.1016/j.memsci.2022.120298

Cited by 12 publications

(1 citation statement)

References 38 publications

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“…This drop was even more pronounced for AnMBR2 as presented in Figure 6b. The gradual decline in permeability indicated that serious membrane fouling has occurred in the flat sheet membrane by gradual deposition of foulants on membrane surface forming a cake layer [45,46]. In this regard, physical fouling preventative remedies (backwashing, gas sparging and solid draining) were no longer effective.…”

Section: Membrane Filtration Performancementioning

confidence: 99%

Volatile Fatty Acids (VFA) Production and Recovery from Chicken Manure Using a High-Solid Anaerobic Membrane Bioreactor (AnMBR)

et al. 2022

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Acidogenic fermentation of chicken manure (CM) for production and recovery of volatile fatty acids (VFA) is an interesting biological waste-to-value approach compared to benchmark organic waste management strategies. Considering the wide range of high value applications of VFA, a semi-continuous immersed anaerobic membrane bioreactor (AnMBR) was applied to boost VFA productivity and yield, while reducing downstream processing stages assisting the recovery of VFA. In this regard, the effect of parameters such as pH and organic loading rates (OLR) on the overall bioconversion and filtration performance was investigated. Thermal-shocked CM was applied both as inoculum and substrate. A very high VFA yield (0.90 g-VFA/g-VS) was obtained in the treatment with no pH control (~8.2) at an OLR of 2 g-VS/(L·d), presenting 24% higher yield compared to that of the controlled pH. Batch assays further demonstrated the enhanced hydrolysis and acidogenesis activities at weak alkaline conditions. A long-term (78 days) fermentation and filtration was successfully performed, where stable membrane filtration performance was experienced for about 50 days under high-solid (suspended solid of 37–45 g/L) and high flux (20 L/(m2·h)) conditions. Results suggest that AnMBR of CM is a feasible and promising process for VFA production and recovery.

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Section: Membrane Filtration Performancementioning

confidence: 99%