Bioprocessing of low-value food waste to high value volatile fatty acids for applications in energy and materials: A review on process-flow

Simulating Rumen Conditions Using an Anaerobic Dynamic Membrane Bioreactor to Enhance Hydrolysis of Lignocellulosic Biomass

“…The concentrations of acetate, propionate, and butyrate in the permeate comprised 35, 32, and 18% of the total VFAs (Table S3). The VFA yield in the rumen AnDMBR was at the high end of the VFA yields reported in other fermentation studies treating food waste (0.3–0.5 g VFA g VS fed –1 ). − However, the rumen AnDMBR was operated with an HRT of 0.50 ± 0.08 days (other systems usually have an HRT above 5 days − ) and with an OLR of 18 ± 2 g VS L R –1 day –1 (other systems fed with food waste usually have a maximum OLR of 11 g VS L R –1 day –1 − ), supporting our goal of designing a system with a small bioreactor footprint and high treatment capacity. For conventional continuous stirred-tank reactors, high OLRs are typically achieved by high feed concentrations, resulting in high VFA concentrations that can inhibit hydrolytic and acidogenic microbial populations and decrease VFA yields. ,,,, The rumen AnDMBR, however, achieved a high OLR by operating at a very low HRT and relatively low permeate VFA concentrations (6.0 ± 1.9 g of VFA as COD L –1 , Table S3 and Figure S5B), allowing for high VFA yields.…”

Simulating Rumen Conditions using an Anaerobic Dynamic Membrane Bioreactor to Enhance Hydrolysis of Lignocellulosic Biomass

“…This study Other studies. [55][56][57][58][59][60][61] VFA yield (g VFA g VSfed -1 ) 0.38 ± 0.10 0.3 -0.5 HRT (days) 0.50 ± 0.08 h >5 OLR (g VS LR -1 day -1 ) 18 ± 2 <11…”