Enhancing microbial viability with biochar for increased methane production during the anaerobic digestion of chicken manure

Fuel, Journal Year: 2024, Volume and Issue: 368, P. 131603 - 131603

Published: March 28, 2024

This investigation explores the effects of integrating acid-alkali treated biochar into anaerobic digestion chicken manure. Digesters containing manure with addition exhibited an 8.4-fold improvement in methane production compared to untreated digesters. In addition, porous structure promoted microbial acclimation, facilitated direct interspecies electron transfer, and provided anchoring points for immobilisation. Anaerobic digesters amended also demonstrated increased chemical oxygen demand removal, up 81.8 %, maintained lower total ammonia concentrations (2,478 mg/L) levels control reactors (4418 mg/L). terms community, propidium monoazide minimised errors live population estimation, providing new insights capacity shield microbes from stress. These findings highlight biochar's quantitative benefits, emphasising its potential enhancing production, mitigating stress, promoting resilience digestion.

Language: Английский

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CFD Modelling and Simulation of Anaerobic Digestion Reactors for Energy Generation from Organic Wastes: A Comprehensive Review

Heliyon, Journal Year: 2025, Volume and Issue: 11(2), P. e41911 - e41911

Published: Jan. 1, 2025

Anaerobic digestion (AD) has been recognized as one of the most viable options for treatment a wide range waste materials. Complex structure wastes is safely broken down to destroy pollutants and pathogens. Biogas produced by-product this process which considered clean energy resource. However, provision controlled environment microbial activities critical ensure required efficiency. This can only be achieved with efficient design vessels used anaerobic digestion, termed AD reactors. functions such mixing, hydrodynamics, multiphase interaction, heat transfer, temperature distribution bio kinetics are significantly affected by reactor shape, configurations, hence making it essential optimize before installation at large scale. Mostly, optimization carried out help lab scale experimentations testing protocols result in high costs repeating several experiments. Computational fluid dynamics (CFD) an applied mathematical tool helps understand predict dynamics, flow well species transport different domains. approach contributes minimize experimental while optimizing configurations less time. The current review presented summarize discuss core characteristics followed concerned CFD attributes. Research gaps challenges identified aspects design, configuration, flow, biokinetics machine learning approaches.

Language: Английский

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Optimized hydrothermal carbonization of chicken manure and anaerobic digestion of its process water for better energy management

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 375, P. 124191 - 124191

Published: Jan. 22, 2025

Language: Английский

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Fe/Co-modified Enteromorpha bio-hydrochar enhanced anaerobic digestion of chicken manure with sulfadimethazine: focusing on synergistic mechanism and microbial community succession

Biochar, Journal Year: 2024, Volume and Issue: 6(1)

Published: Nov. 11, 2024

Abstract Residual antibiotics in chicken manure may interfere with the stability of anaerobic digestion (AD) and inhibit resource utilization efficiency. In this study, we aimed to enhance bio-methanation AD high-concentration sulfamethazine (SMZ) by adding metal (Fe, Co)-modified Enteromorpha -based hydrochar (Co-HC, Fe-HC). The results showed that Fe-HC Co-HC increased degree acidogenesis 1.25 times 1.58 times, respectively. maximum protein concentration EPS was 47.64% 72.5% after Co-HC. However, only demonstrated notable improvements both methane production SMZ removal Electrochemical analysis possessed a richer variety oxygen nitrogen functional groups, along superior electron exchange capabilities compared Fe-HC. Furthermore, microbiological assessments revealed enriched syntrophic bacteria (such as Syntrophomonas Mesotoga ), facilitating direct interspecies transfer (DIET) subsequently enhancing biomethane production. abundance genes involved significantly Co-HC, increase 75.86% Co1.5-HC treatment. Additionally, elimination antibiotic resistance ( sul1 , sul2 ) 65.66% This study offers theoretical foundation empirical support for synergistic improvement livestock poultry containing high concentrations, thereby helping overcome challenges posed recalcitrant substances. Graphical

Language: Английский

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Optimizing biogas production from swine manure: biogas recirculation coupled with pH adjustment to mitigate lime inhibition

Process Safety and Environmental Protection, Journal Year: 2025, Volume and Issue: unknown, P. 107234 - 107234

Published: April 1, 2025

Language: Английский

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Insights into Physiochemical and Biological Characteristics of Pig Manure During Anaerobic Digestion and Sheep Manure During Composting

Fermentation, Journal Year: 2025, Volume and Issue: 11(6), P. 307 - 307

Published: May 27, 2025

The physiochemical and biological properties of animal manures are crucial factors in resource utilization. Herein, the characteristics pig manure during anaerobic digestion sheep composting were investigated. rich heavy metals. Zn was most abundant metal, range 586.9–2069 mg/kg manures. After digestion, contents cellulose, hemicellulose, lignin increased by 59.97%, 6.90%, 171.81%, respectively, while NH4+-N, NO3−-N, total nitrogen, phosphorus, K decreased 5.50–48.27% manure. 20.56–61.82% after composting. all metals compost, especially content which 145.6%. Potential pathogenic bacteria including Pseudomonas, Clostridium sensu stricto 1, Acholeplasma, Tissierella, Halomonas Composting could inactivate well, a large number still remained digestate if solid retention time short digestion. findings would be helpful for understanding developing effective treatment utilization technologies.

Language: Английский

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Wood biochar enhances methanogenesis in the anaerobic digestion of chicken manure under ammonia inhibition conditions

Heliyon, Journal Year: 2023, Volume and Issue: 9(11), P. e21100 - e21100

Published: Oct. 21, 2023

The process of breaking down chicken manure through anaerobic digestion is an effective waste management technology. However, can be a challenging feedstock, causing ammonia stress and digester instability. This study examined the impacts adding wood biochar acid-alkali-treated to anaerobically digest under conditions inhibition. results highlighted that only addition 5 % by volume achieve cumulative methane production close typical potential range manure. treated also exhibited highest total nitrogen removal compared Control treatment. Scanning Electron Microscope revealed growing interactions between methanogens over time. Real-time polymerase chain reaction showed produced number bacterial biomass. In addition, 16S amplicon-based sequencing identified more robust archaeal community from addition. Overall, acid-alkali treatment represents method modifying improve its performance in digestion.

Language: Английский

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Enhanced methane production during the anaerobic digestion of chicken manure through the addition of pristine and recovered biochar

Cleaner Waste Systems, Journal Year: 2023, Volume and Issue: 7, P. 100126 - 100126

Published: Dec. 19, 2023

This study investigates the impact of a 50:50 mixture pristine and recovered biochar (CBC) on high-solids anaerobic digestion chicken manure, comparing its performance with (PBC), (RBC), Control group. The experiment, conducted under mesophilic conditions using 15% total solid content 5% dosage, showed that CBC treatment achieves highest cumulative biogas production (314 mL g-1-VS) methane o(112 over 21 days. Further, digesters containing exhibited rate COD removal (80.8%), surpassing amended PBC (71.1%), RBC (69.2%) (57.8%). Although higher TAN adsorption capacity 48 mg g-1 compared to 32 CBC, both existing microbial population 1.2 ×1014 microbes per gram, have allowed exhibit superior digester performance. These findings offer valuable insights for optimising processes cutting operational costs in waste-to-energy projects incorporating as an additive.

Language: Английский

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Bridging the Gap between Biowaste and Biomethane Production: A Systematic Review Meta-Analysis Methodological Approach

Sustainability, Journal Year: 2024, Volume and Issue: 16(15), P. 6433 - 6433

Published: July 27, 2024

Anaerobic digestion (AD) is a promising biowaste valorization technology for sustainable energy, circular economy, local energy community growth, and supporting authorities’ environmental goals. This paper presents systematic review meta-analysis methodology biomethane estimation, using over 600 values of volatile solids (VS) content biochemical methane potential (BMP) six different waste streams, collected from 240 scientific studies. The streams include cow manure (CM), sheep/goat (SGM), wheat straw (WS), household (HW), organic fraction municipal solid (OFMSW), sewage sludge (SS). statistical analysis showed mean VS 11.9% 37.3% 83.1% 20.8% 19.4% 10.6% (SS), with BMP 204.6, 184.1, 305.1, 361.7, 308.3, 273.1 L CH4/kg VS, respectively. case study Kozani, Greece, demonstrated the methodology’s applicability, revealing annual CH4 production 15,429,102 m3 (corresponding to 551 TJ energy), SGM, WS, CM as key substrates. aiming climate neutrality by 2030, currently employs conventional management, like composting, while many business residual remain unused. proposed model facilitates design implementation AD units sustainable, climate-neutral future.

Language: Английский

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High rate methanogenesis and nitrogenous component transformation in the high-solids anaerobic digestion of chicken manure enhanced by biogas recirculation ammonia stripping

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 155744 - 155744

Published: Sept. 1, 2024

Language: Английский

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