Effect of Total Solids on Biogas Production in a Fixed Dome Laboratory Digester under Mesophilic Temperature

Masinde, Barasa H.; Nyaanga, D. M.; Njue, Musa R.; Matofari, Joseph W.

doi:10.22606/as.2020.42003

Cited by 5 publications

(3 citation statements)

References 45 publications

(46 reference statements)

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“…Biogas measurement was done using a water displacement method [39,40,2]. The daily biogas generated from the digester passes through the gas outlet.…”

Section: Biogas Production and Analysismentioning

confidence: 99%

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Effect of Cow Dung to Maize Silage Mix Ratios and Temperature Variation on Biogas Production in Laboratory Batch Digester

Chol¹,

Muchuka²,

Nyaanga³

2022

JEECE

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Optimization of biogas production from a given substrate and digester is an issue that needs to be addressed during the development of anaerobic digestion. To maximize the biogas production rate, the operating parameters that influence anaerobic digestion must be controlled and monitored. This research was carried out using a 0.15 m 3 laboratory digester. The study evaluated the effect of cow dung and maize silage mix ratios (1:1, 1:3, and 3:1) on biogas production which were compared to their pure substrates at a constant temperature of 20°C. The temperatures (20°C, 25°C, and 30°C) were then evaluated using the optimal mix ratio of 3:1 as feedstock. The Temperature of the digester was controlled and monitored using Programmable Temperature Controller (Multispan UTC 421) and the (PLC) running on SIEMENS LOGO. The mix ratios and temperatures showed a significant effect on biogas production (P≤0.05) with mix ratios of 3:1 and 1:1 improving biogas production by 31.24% and 15.52% respectively compared to cow dung. The temperatures of 25°C and 30°C increased biogas by 26.99% and 47.35% and methane increased by 3.92% and 11.76% respectively compared to the mesophilic temperature of 20°C. The study thus, recommends a mix ratio of 3:1 and the optimal temperature of 30°C for a 0.15 m 3 laboratory temperature-controlled fixed-dome anaerobic digester of cow dung and maize silage as a substrate when fed as a batch reactor.

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“…Biogas measurement was done using a water displacement method [39,40,2]. The daily biogas generated from the digester passes through the gas outlet.…”

Section: Biogas Production and Analysismentioning

confidence: 99%

“…The process is repeated several times until the daily produced biogas is exhausted in the digester. The volume of biogas produced per day is calculated by computing the production rate in cubic metres per cubic metre of the digester volume per day (m 3 /m 3 day) [39,40,2].…”

Section: Biogas Production and Analysismentioning

confidence: 99%

Effect of Cow Dung to Maize Silage Mix Ratios and Temperature Variation on Biogas Production in Laboratory Batch Digester

Chol¹,

Muchuka²,

Nyaanga³

2022

JEECE

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“…As opposed to other stages, acidogenesis is generally believed to proceed at a faster rate than all other processes of anaerobic digestion, with acidogenic bacteria having a regeneration time of fewer than 36 hours. With the rapidity of this stage, the production of volatile fatty acids creates direct precursors for the final stage of methanogenesis; VFA acidification is widely reported to be a cause of digester failure [25]. During acidogenesis, the pH reduces [26].…”

Section: Acidogenesismentioning

confidence: 99%

Microbes - The Key Players in Anaerobic Digestion for Biogas Production

Ukaegbu-Obi¹

2022

J Microbiol Microb Technol

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Assessment of Physico-Chemical Properties of Biogas Slurry as an Organic Fertilizer for Sustainable Agriculture

Nagdev,

Khan,

Dhupper

2024

J Exp Bio & Ag Sci

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Chemical fertilizers have been extensively used for growing crops and controlling plant diseases, but they pose potential hazards to the environment, soil health, plants, and people. The current world situation highlights the need to implement eco-friendly agricultural practices for sustainable crop production. Using environmentally friendly manure, such as biogas slurry, can help reduce the negative effects of chemical fertilizers. Biogas slurry is an efficient waste material and organic fertilizer, making it an ideal supplement for sustainable crop production and waste management. An experiment was conducted at IARI, New Delhi, to explore the nutrient potential of biogas slurry. The main objective of this study was to assess biogas slurry's physico-chemical characteristics and nutrient contents. Samples of biogas slurry were collected in three replications and analyzed using standard methods for macro and micronutrients. The data revealed that biogas slurry has a pH of 7.2-8.5, EC of 1.06 to 1.12 dS/m, and organic carbon content of 41.7 to 45.8%. In terms of fertility, it contains significant amounts of nitrogen (1.98-2.17%), phosphorus (0.97 to 1.15%), and potassium (1.98 to 2.17%). Additionally, biogas slurry contains micronutrients such as Zn (0.023-0.027 ppm), Cu (0.005-0.009 ppm), Fe (0.32-0.38 ppm), and Mn (0.089-0.094 ppm). Statistical analysis using ANOVA and Post Hoc tests indicated that the mean data values among all three replications do not differ significantly. Therefore, it can be concluded that the nutritive value of biogas slurry is sufficient to reduce the reliance on chemical fertilizers in agriculture. It represents an optimal long-term organic remedy for developing fertile soil, ensuring enduring agricultural productivity, and mitigating the negative environmental impacts associated with waste management.

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Effect of Total Solids on Biogas Production in a Fixed Dome Laboratory Digester under Mesophilic Temperature

Cited by 5 publications

References 45 publications

Effect of Cow Dung to Maize Silage Mix Ratios and Temperature Variation on Biogas Production in Laboratory Batch Digester

Effect of Cow Dung to Maize Silage Mix Ratios and Temperature Variation on Biogas Production in Laboratory Batch Digester

Microbes - The Key Players in Anaerobic Digestion for Biogas Production

Assessment of Physico-Chemical Properties of Biogas Slurry as an Organic Fertilizer for Sustainable Agriculture

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