Enhanced biohydrogen production from thermally hydrolysed pulp and paper sludge via Al2O3 and Fe3O4 nanoparticles

Process Safety and Environmental Protection, Journal Year: 2024, Volume and Issue: 210, P. 82 - 96

Published: Aug. 25, 2024

Language: Английский

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Nano zerovalent iron boosts methane content in biogas and reshapes microbial communities in long-term anaerobic digestion of pig slurry

Renewable Energy, Journal Year: 2024, Volume and Issue: 239, P. 122133 - 122133

Published: Dec. 9, 2024

Language: Английский

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Residence Time Reduction in Anaerobic Reactors: Investigating the Economic Benefits of Magnetite-Induced Direct Interspecies Electron Transfer Mechanism

Energies, Journal Year: 2024, Volume and Issue: 17(2), P. 358 - 358

Published: Jan. 10, 2024

Existing research on direct interspecies electron transfer (DIET) has predominantly focused the types and concentrations of conductive materials across diverse anaerobic digestion. However, insufficient understanding impact residence time, a critical economic factor, prompted this investigation. Magnetite, material, was introduced into digestion food wastewater, leading to significant increase in ultimate methane production (Bu) with 25 mM-Fe3O4 (p < 0.05). Despite subsequent decline efficiency from 388.9% 7.1% over 15- 65-day period, initial increased due magnetite addition evident. Control’s maximum rate (Rm) 27.5 mL/day, reaching its highest point at 37.4 mL/day 15 mM-Fe3O4, accompanied by noteworthy 56.6% reduction attainment day Rm (Rm-day), shortened 8.2 days. Even 100 while Bu showed no difference, Rm-day exhibited substantial 22.8. lower overall under some input conditions, study confirmed shortening Rm-day, suggesting that DIET mechanism induced such as could reduce time continuous-type reactors, contributing improved feasibility.

Language: Английский

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Effects of Magnetite (Fe3O4) as an Electrical Conductor of Direct Interspecies Electron Transfer on Methane Production from Food Wastewater in a Plug Flow Reactor

Processes, Journal Year: 2023, Volume and Issue: 11(10), P. 3001 - 3001

Published: Oct. 18, 2023

This study was conducted in order to examine the impact of magnetite (Fe3O4), a conductive material capable promoting direct interspecies electron transfer (DIET) among microorganisms, on efficiency anaerobic digestion plug flow reactor (PFR) using food wastewater (FW) as substrate. The effects recovering and replenishing discharged along with digestate during continuous operation PFR were also evaluated. A total volume 17 L utilized for digestion. inoculum obtained from Icheon Biogas Research Facility, which operated mixture pig slurry FW 7:3 (w/w) ratio. used substrate (volatile solids (VS) content 85,865 mg-VS/L). set at 39 °C, after stabilization period approximately 82 days, hydraulic retention time (HRT) 40 days. three stages: stage 1 (83~122 days), 2 (123~162 3 (163~202 days). For maintenance an organic loading rate 2.12 kg-VS/m3/d, 0.3 L/d added every 24 h, analysis equal amount performed. experimental treatments included control without addition period, treatment (T1) (20 mM digestate) subsequent recovery replenishment discharge digestate, (T2) mM) magnetite. Analytical parameters characteristics (pH, NH4+-N, chemical oxygen demand (CODCr), volatile fatty acids (TVFAs), alkalinity), methane production (Mp). During no significant differences pH based magnetite, observed, stably functioning observed. However, 2, due increased degradation matter caused by DIET, CODCr T1 T2 decreased 9.42% compared control. In 3, maximum T1. Mp similar that control, 3.06%, 5.40% Regarding ratio methanogens community, results showed increase community acetotrophic methanogens, specifically Methanosarcina. findings this confirm DIET effectively promoted maintaining concentration 20 while

Language: Английский

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Energy Recovery Efficiency of Integrating Anaerobic Co-Digestion of Pig Slurry and Feedlot Cattle Manure and Hydrothermal Carbonization of Anaerobic Sludge Cake

Processes, Journal Year: 2024, Volume and Issue: 12(1), P. 198 - 198

Published: Jan. 16, 2024

Hydrothermal carbonization (HTC) is a technology designed to improve the efficiency of bioenergy recovery by subjecting biomass high-temperature and high-pressure conditions. By integrating this technical feature with anaerobic digestion (AD), enhanced energy achieved in treating digestate (AD-T). The study investigates enhancing through an integrated process, combining AD livestock manure HTC. primary objective conversion characterized varying solid contents chemical compositions. Shortening hydraulic retention time (HRT) resulted decreased degradation rate within AD-T. This led increased material accumulation, which was crucial for subsequent HTC reaction. reaction exhibited its maximum at 160 °C. input manure, obtained mixing pig slurry feedlot cattle 1:1 (w/w) ratio, 171,167 MJ/day. Under different HRT conditions (40, 30, 20 days), recoverable from ranged 60,336 68,517 MJ/ton. Integration net 106,493 130,491 MJ/day under corresponding conditions, highlighting potential efficiency.

Language: Английский

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Continuous augmentation of anaerobic digestion with electroactive microorganisms: Performance and stability

Bioresource Technology, Journal Year: 2024, Volume and Issue: unknown, P. 131523 - 131523

Published: Sept. 1, 2024

Language: Английский

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Effect of supplementation levels of magnetite (Fe3O4) as an interspecies direct interspecies electron transfer (DIET) on methane production in a biochemical methane potential (BMP) test using an inoculum from anaerobic digestate adapted to food wastewater

Journal of Animal Environmental Science, Journal Year: 2024, Volume and Issue: 26(3), P. 113 - 120

Published: Aug. 30, 2024

Language: Английский

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