Enhancing semi-continuous carboxylic acid production from methane-arrested anaerobic digestion of cellulosic biomass by in-situ product removal with CO2-sustained anion-exchange resin adsorption

Wu, Haoran; Olokede, Opeyemi; Hsu, Shen-Chun; Roy, Samarpita; Holtzapple, Mark T.

doi:10.1016/j.jclepro.2022.133000

Cited by 5 publications

(2 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results indicate that lowering product inhibition can simultaneously enhance substrate conversion and acid production, which is consistent with previous AM studies. 15,35 When the target HRT was switched to 2 d, the productivity slightly increased to 15.7 g/(L liq •d), and substrate conversion increased by 4% to 0.81 g COD digested /g COD fed , but the VFA yield significantly decreased to 0.55 g COD TVFAs / g COD fed . At 2 days of HRT, Figure 1c shows that the mass fraction of C4 in ESR decreased from 68.9% (Day 17) to 55.0% (Day 20), while the LA fraction increased from 0.05 to 20.4%.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…The results from sensitivity analyses underline the importance for future researchers and practitioners to focus on enhancing VFA yield in the overall process (e.g., increase AM efficiency, reduce VFA loss from down- stream processes) and minimizing the cost related with VFA acidification (e.g., WBA cost reduction, WBA capacity increase). Enhancing VFA yield in AM can be achieved through several strategies: (1) employing tailored microbial consortia with higher VFA productivity and tolerance, 4 (2) increasing feedstock COD concentration or volatile solid loading rate, 15 (3) implementing multistage countercurrent operation strategy for high-solid content feedstocks, 35 (4) utilizing a codigestion approach with nutrient-rich feedstocks (e.g., food waste, manure) to maintain an optimal carbon and nitrogen ratio in the digester environment, 38 and ( 5) implementing pretreatment processes to increase digestibility of feedstocks. Additionally, ISPR presents a promising approach for further enhancing the VFA yield, but minimizing the associated OPEX and CAPEX is crucial for its expanded applications.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Sustainable Aviation Fuel from High-Strength Wastewater via Membrane-Assisted Volatile Fatty Acid Production: Experimental Evaluation, Techno-economic, and Life-Cycle Analyses

Wu,

Kim,

Ferdous

et al. 2024

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

To reduce emissions from combustion of fossil fuels, sustainable aviation fuels (SAFs) have the potential to decarbonize the aviation sector. Redirecting wastes from conventional waste management practices and using them as cost-effective feedstocks for low-carbon fuels can reduce emissions from both waste disposal and fuel combustion. One approach is to upgrade wet wastes to SAF precursors, such as volatile fatty acids (VFAs). In this study, novel membrane-assisted arrested methanogenesis was developed to convert high-strength wastewater to VFAs. Based on experimental results of VFA production, techno-economic and life-cycle analyses were conducted to estimate the potential economic and environmental benefits of SAF production from high-strength wastewater via VFAs. By evaluating three proposed scenarios for VFA production, a minimum production cost of VFA is achieved at $0.60/kg VFA at a wastewater flow rate of 1100 MT/d. For the corresponding VFA-derived SAF, the estimated minimum fuel selling price is $4.64/gasoline gallon equivalent. The life-cycle analysis shows that up to a 71% reduction in greenhouse gas emissions can be achieved relative to its fossil-counterpart along with lower water and fossil-fuel consumption.

show abstract

Section: ■ Materials and Methodsmentioning

confidence: 99%