Anaerobic Co-Digestion of Cattle Manure and Brewer’s Residual Yeast: Process Stability and Methane and Hydrogen Sulfide Production

Fermentation, Journal Year: 2023, Volume and Issue: 9(12), P. 993 - 993

Published: Nov. 21, 2023

Anaerobic co-digestion (AcoD) of animal waste and agro-industrial by-products has been widely studied employed to increase biogas production potential enhance process stability. This study evaluated the AcoD cattle manure (CM) brewer’s residual yeast (RY) in semi-continuous biodigesters, focusing on energy (biogas methane yields) Four treatments were assessed, each with different proportions (% volatile solids) CM RY: 100:0, 88:12, 78:22, 68:32. Trials conducted 30-L tubular reactors at room temperature a hydraulic retention time 30 days. The inclusion RY led gradual rise production, more significant reductions solid content than mono-digestion CM. addition resulted daily CH4 increases 18.5, 32.3, 51.9% for 12, 22, 32% RY, respectively, compared control treatment. Therefore, demonstrated higher recovery. However, introduced elevated H2S levels biogas. Caution is advised when adding this co-substrate due influence application restrictions.

Language: Английский

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Investigating the effects of biochars and zeolites in anaerobic digestion and co-digestion of cassava wastewater with livestock manure

Frontiers in Energy Research, Journal Year: 2024, Volume and Issue: 12

Published: Nov. 1, 2024

The tangible effects of climate change and the influence environmental factors on have driven a shift towards cleaner more sustainable energy sources. This study investigates biochar zeolites in anaerobic digestion (AD) co-digestion processes cassava wastewater (CW) with livestock manure, aiming to assess their impact methane (CH 4 ) carbon dioxide (CO 2 production, as well process stability. employs design experiments, analysis variances, parameter sensitivity, differential explore how varying concentrations key production parameters optimize overall process. Results indicate that increasing zeolite produce alternating CO CH generation, CW significantly contributing production. Livestock manure shows similar both gases, necessitating calculated trade-offs prioritizing one over other. Findings provide insights into enhancing biogas waste management, bioenergy treatment practices. Numerical results demonstrate increased mixtures rates respectively by an approximate factor 2, 18% 5% respectively. Similarly, contributed 9% respectively, boosting 1 −2. study’s significance lies its potential improve yield efficiency, fostering advancements renewable management.

Language: Английский

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Evaluation of germination as pretreatment method to increase methane production: A case study in papaya seed

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: 10, P. 100788 - 100788

Published: June 14, 2024

This research aims to evaluate the effect germination of papaya seeds (GPS) on methane production (batch mode) and application GPS in co-digestion (continuous mode). Batch mode study showed that, compare non-germinated (NGPS), can increase (p < 0.05) by 180 %, 57 81 % for fresh GPS, meal, dry respectively. Methane yields continuous were 173.58, 260.71; 269.92; 329.35 L/kg volatile solid control; 90 dairy cow manure (DCM) 10 NGPS; DCM GPS; 80 20 GPS. Germination PS.

Language: Английский

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Utilization of Agricultural Waste for Water and Wastewater Treatment Processes

Published: Jan. 1, 2024

Language: Английский

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Effects of peanut shell biochar and fermented cow manure on plant growth and metabolism of tomato

Chemical and Biological Technologies in Agriculture, Journal Year: 2024, Volume and Issue: 11(1)

Published: Aug. 12, 2024

This experimental study used peanut shell biochar and fermented cow manure as the main raw materials forming a substrate for tomato plants. Substrates were created from biochar, manure, slag, vermiculite mixed in volume ratios of 6:0:1:2, 5:1:1:2, 4:2:1:2, 3:3:1:2, respectively. Comparisons made to control composed peat, ratio 6:1:2, As proportion increased, bulk density showed downward trend while total porosity, aeration water holding capacity upward trends. N, available K, Ca, Mg increased. Tomatoes demonstrated similar or better growth than at composition 6:0:1:2 5:1:1:2. was reflected seedling strength index, growth, chlorophyll content, root plant carbohydrates, purine metabolism, caffeine galactose starch sucrose metabolism. The results this indicate 5:1:1:2 most beneficial terms supporting confirms composite promotes by improving environment investigation provides new information moderate use peat support efforts achieve carbon neutrality through creative utilization agricultural waste.

Language: Английский

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Effect of aeration pretreatment on anaerobic digestion of swine manure

Environmental Technology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 17

Published: Oct. 16, 2024

To investigate the effects of aeration pretreatment on anaerobic digestion (AD) swine manure, five groups were established with dissolved oxygen (DO) in each group set to 0.0, 0.4, 0.8, 1.4, and 2.0 mg/L, respectively. The results demonstrated that compared non-aeration group, methane production increased varying degrees different pretreatments (AP), a maximum increase 27.98% (DO = mg/L). AP reduced hydrogen sulfide (H

Language: Английский

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Strategies for microbiome management in biogas digesters using biomolecular tools

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 27 - 67

Published: Nov. 29, 2024

Language: Английский

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Effect of substrate dilution ratios (SDRs) on biogas and bioslurry production from anaerobic digestion of pig faeces under field conditions

Biomass Conversion and Biorefinery, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 29, 2024

Language: Английский

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