Cascading valorization of defatted rice bran for lactic acid fermentation and biogas production DOI Creative Commons
Christiane Herrmann, Raj Shekhar Bose,

Anna‐Katrin Neu

et al.

Biofuel Research Journal, Journal Year: 2024, Volume and Issue: 11(03), P. 2146 - 2167

Published: Aug. 31, 2024

This study investigated the integrated valorization of defatted rice bran (DRB) by converting it into lactic acid (LA) and subsequently utilizing residues from LA production for biomethane generation through anaerobic digestion (AD). Processing 480 kg DRB resulted in 70 L pure generated significant waste streams, primarily consisting 572 decanted hydrolysate pellet (Pellet DEC) 220 microfiltration retentate (Retentate MF). Exceptionally high methane yields 374‒434 LN kgVS-1 were observed fermentation biochemical potential tests, indicating their biogas production. During long-term semi-continuous AD, varying organic loading rates (OLRs) 0.5‒2.5 kgVS m-3 d⁻¹ demonstrated feedstock- OLR-dependent Reactor failure at higher OLRs was attributed to accumulation total ammoniacal nitrogen (TAN). The co-digestion Pellet DEC Retentate MF proved be more resilient, with up 2 d-1, mitigating TAN inhibition. Methane yields, ranging 265‒334 before reaching inhibitory OLR levels, than those found literature. Process integration has emerged as a promising approach because could effectively offset energy demands Supported life cycle assessment, processes showed 67% lower environmental impact midpoint 71% endpoint, along an 80% reduction costs compared standalone Results enhancement sustainability economic viability this biorefinery approach.

Language: Английский

Cascading valorization of defatted rice bran for lactic acid fermentation and biogas production DOI Creative Commons
Christiane Herrmann, Raj Shekhar Bose,

Anna‐Katrin Neu

et al.

Biofuel Research Journal, Journal Year: 2024, Volume and Issue: 11(03), P. 2146 - 2167

Published: Aug. 31, 2024

This study investigated the integrated valorization of defatted rice bran (DRB) by converting it into lactic acid (LA) and subsequently utilizing residues from LA production for biomethane generation through anaerobic digestion (AD). Processing 480 kg DRB resulted in 70 L pure generated significant waste streams, primarily consisting 572 decanted hydrolysate pellet (Pellet DEC) 220 microfiltration retentate (Retentate MF). Exceptionally high methane yields 374‒434 LN kgVS-1 were observed fermentation biochemical potential tests, indicating their biogas production. During long-term semi-continuous AD, varying organic loading rates (OLRs) 0.5‒2.5 kgVS m-3 d⁻¹ demonstrated feedstock- OLR-dependent Reactor failure at higher OLRs was attributed to accumulation total ammoniacal nitrogen (TAN). The co-digestion Pellet DEC Retentate MF proved be more resilient, with up 2 d-1, mitigating TAN inhibition. Methane yields, ranging 265‒334 before reaching inhibitory OLR levels, than those found literature. Process integration has emerged as a promising approach because could effectively offset energy demands Supported life cycle assessment, processes showed 67% lower environmental impact midpoint 71% endpoint, along an 80% reduction costs compared standalone Results enhancement sustainability economic viability this biorefinery approach.

Language: Английский

Citations

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