Achieving partial nitrification by sludge treatment using sulfide: Optimal conditions determination, long-term stability evaluation and microbial mechanism exploration

Bioresource Technology, Journal Year: 2024, Volume and Issue: 408, P. 131207 - 131207

Published: Aug. 3, 2024

Language: Английский

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Upcycling nitrogen and curbing greenhouse gas emissions from wastewater through H2-driven assimilatory mixotrophic metabolism

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 489, P. 151207 - 151207

Published: April 10, 2024

Biological nitrogen assimilation is an emerging technique for the removal and upcycling of from wastewater in form microbial protein (MP). For this purpose, a mixed hydrogen-oxidizing bacteria (HOB) culture capable growing mixotrophically was evaluated treatment synthetic real under different carbon-to-nitrogen (C/N) ratios. The same HOB grown heterotrophic conditions to compare process performances terms ammonium (N-NH4+) assimilation, chemical oxygen demand (COD) removal, CO2 release, biomass concentration, yield content. Under mixotrophic conditions, highest concentration 342.5 mg VSS∙L−1, doubling that obtained (161.2 VSS∙L−1). Discharge limits both COD total N were met with into protein-rich achieving up 99 %. On contrary, high content residual as nitrite (up 26 mg∙L−1 N-NO2−) did not allow meet discharge N. gave promising results (0.32 g VSS·g CODH2+acetate−1) 56 % VSS) when mixotrophically. instead, (0.25 CODacetate−1) (35 %) substantially lower. This study suggests H2-driven assimilatory metabolism can be successfully applied produce effluents while mitigating greenhouse gas emissions (CO2 N2O) MP.

Language: Английский

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Single-cell Protein Bioplastic Films from Recovered Nitrogen and Carbon with High Anaerobic Biodegradability and Biogas Potential at End-of-Life

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(42), P. 15603 - 15612

Published: Oct. 9, 2024

The majority of plastics used today are produced from nonrenewable resources, and, depending on the end-of-life management, they may end up in landfills or nature, giving rise to microplastic pollution. A potential way minimizing this is use proteins, preferentially recovered organic waste and residues, make plastics. In line with this, we explored here protein-based bioplastics sourced single-cell protein (SCP). Films glycerol-plasticized SCPs (grown by recovering carbon cheese whey nitrogen anaerobic digestate) were compression molding. Electron microscopy revealed a structure intact cells presence cracks/voids, mechanical properties indicated rather poor cohesion between cells, despite high-temperature treatment pressing stage. resulting yielded material that could absorb sizable amount both nonpolar (rapid capillary uptake) polar liquids. biodegradation SCP films demonstrated full biodegradability (100%) high specific biomethane productions (471 ± 8 mL/gram volatile solids) be attained within operating conditions typical digestion processes food waste. Overall, study highlights also challenge using as an alternative bioplastic packaging edible coatings.

Language: Английский

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Simultaneous production, concentration, and upgradation of acetate into single-cell protein in a hybrid microbial electrochemical system

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 503, P. 158446 - 158446

Published: Dec. 9, 2024

Language: Английский

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One-stage single cell protein production from hemp (Cannabis sativa L.) biomass residues and cheese whey through sequential anaerobic-aerobic fermentation

Waste Management, Journal Year: 2024, Volume and Issue: 193, P. 462 - 471

Published: Dec. 27, 2024

Language: Английский

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Sulfur-containing microbial protein production from sulfide-rich biogas in hollow fiber membrane bioreactors

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: unknown, P. 115264 - 115264

Published: Dec. 1, 2024

Language: Английский

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