Effects of Different Microplastics on Methane Production and Microbial Community Structure in Anaerobic Digestion of Cattle Manure

Agronomy, Год журнала: 2025, Номер 15(1), С. 107 - 107

Опубликована: Янв. 3, 2025

Microplastics (MPs) are widely distributed in the environment, and they inevitably enter animal bodies during livestock poultry farming, leading to their presence manure. However, there is limited research on effects of different types MPs anaerobic digestion (AD) performance Herein, we investigated impact four (polyvinyl chloride (PVC), polypropylene (PP), polyethylene (PE), polyhydroxyalkanoate (PHA)) AD using cattle manure as a substrate. Results demonstrated that cumulative methane production PE group reached 5568.05 mL, exhibiting an 11.97% increase compared control group. Conversely, was decreased by 5.52%, 9.69%, 14.48% PP, PVC, PHA groups, respectively. Physicochemical analyses showed promoted organic matter hydrolysis day 4 AD, accumulation volatile fatty acids (VFAs) initial stage. Specifically, acetic acid content 44.48–92.07 mL/L higher than first 8 days. also enriched microorganisms associated with production. The abundance Firmicutes enhanced 2.89–17.57%, Methanosaeta 8.42–12.48%, Methanospirillum 10.91–16.89% comparison control; whereas 8.14–31.40%. Moreover, inhibited suppressing acetate kinase activity while promoting lactate dehydrogenase release from involved process. Based changes observed key enzyme functional gene abundances, reduced acetyl-CoA carboxylase abundance, negatively affecting acetone cleavage methanogenesis pathway. Meanwhile, significantly increased acetate-CoA ligase thereby results provide novel insights into influence exerted when applied

Язык: Английский

An Evaluation of the Energy Potential of Agri-Food Waste: Green Residues from Tomato (Solanum lycopersicum L.) and Shea Nutshells (Vitellaria paradoxa)

Energies, Год журнала: 2025, Номер 18(3), С. 730 - 730

Опубликована: Фев. 5, 2025

Addressing the agricultural challenges of agri-food waste accumulation, this study assessed energy potential green residues from tomato (Solanum lycopersicum L. cv. Kmicic) plants in different fertilizer configurations and Shea nutshell (Vitellaria paradoxa) waste. Two key parameters were compared: (I) Calorific Value (CV), representing thermal treatment, (II) Biogas Biomethane production potential, biochemical treatment. Potential was estimated using Baserga method fermentable organic matter (FOM) method. Additionally, effect fertilization on elemental composition its analyzed. showed better properties for both utilization, with a CV 16.29 MJ/kg. The FOM methods estimation that highest yields 504.18 671.39 LN/kg DM, respectively. Among fertilized residues, volcanic tuff additive resulted an optimal C/N ratio (28.41) high 457.13 DM (Baserga) 542.85 (FOM). These findings demonstrate feasibility employing as promising feedstock production.

Язык: Английский

Synergetic Hydrogen and Methane Productions from Anaerobic Digestion of Selected Rural-Farming Plant and Animal-Based Biomass Wastes

Korean Journal of Chemical Engineering, Год журнала: 2024, Номер unknown

Опубликована: Окт. 5, 2024

Язык: Английский