Effects of Alkali Pre-treatment, Total Solid Content, Substrate to Inoculum Ratio, and pH on Biogas Production from Anaerobic Digestion of Mango Leaves

Abudi, Zaidun Naji; Hu, Zhiquan; Abood, Alkhafaji R.; Liu, Dongqi; Gao, Aiping

doi:10.1007/s12649-018-0437-0

Cited by 25 publications

(7 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The maximum pH for biogas generation varies from 6.5-7.5 [45]. Research done on biogas production using mango leaves pretreated with an alkaline solution proved that the pH of 7.5 produced the highest amount of biogas [46] which is in line with the present study. A drop of lemon juice was used to pretreat the co-digested feedstock (Irish potato peels and banana peels) from 6.9 to 6.5 and therefore methanogenic activities within the digester-contained feedstock with pH of 6.5 were inhibited in comparison to other digesters.…”

Section: E Outcome Of Ph On Biogas Generationsupporting

confidence: 91%

Co-digestion of Fruit and Tuber Waste for Biogas Enhancement: A Synergy Effect

2023

Nov. 16-17, 2023 Johannesburg (South Africa)Back 39th JOHANNESBURG International Conference on “Chemical, Biological and Enviro

View full text Add to dashboard Cite

The increase in urbanization and consumerization leads to uncontrolled amounts of food waste and municipal solid waste in the surroundings. This waste contained organic matter that is potential for biogas production that could address the issues of energy insecurity and waste management. Various literature explores methods of generating biogas via co-digestion of feedstock. In this study, different feedstock was co-digested and biogas generation was measured. It was noted that banana peels and Irish potato peels give more yield. Different parameters were studied as mixing ratio, temperature, and pH. The highest amount of biogas production (2907± 32mL) was obtained at 1:1 which is twice the yield obtained in a digester containing 1:4 (1532±17mL). The yield was directly proportional to temperature; the highest yield was obtained at a temperature of 40°C while the lowest yield was at 20°C. Meanwhile, the pH that was considered in this study were 6.5, 6.9, and 7.3 where yield was 2808±31mL, yield (2907± 32mL), and 7810±86mL respectively. It shows that there is an increase in biogas by 178.1%. The pH for fruit waste and tuber waste were 6.9 and 6.7 while their CN ratio were 28 and 18 respectively. A synergy effect of 4.5 was observed which had never been obtained by other researchers before. The study recommends the use of banana peels (fruit waste) and Irish potato peels (tuber waste) as co-digested feedstock for biogas generation.

show abstract

Section: E Outcome Of Ph On Biogas Generationsupporting

confidence: 91%

Co-digestion of Fruit and Tuber Waste for Biogas Enhancement: A Synergy Effect

2023

Nov. 16-17, 2023 Johannesburg (South Africa)Back 39th JOHANNESBURG International Conference on “Chemical, Biological and Enviro

View full text Add to dashboard Cite

show abstract

“…[17][18][19] Inoculum to substrate (I:S) ratio is another significant parameter in the assessment of anaerobic batch digesters and the I:S ratio significantly affects the methane production. 20,21 It was shown that methane production rates were clearly different with three experimental ratios and AD of swine slurry should be carried out at the I:S ratio of around 1:1, thereby avoiding reactor imbalances due to volatile fatty acid (VFA) accumulation. 22 Wei et al 23 evaluated the effects of substrate mixing and I:S ratios.…”

mentioning

confidence: 99%

Enhancing methane production from anaerobic co‐digestion of cow manure and barley: Link between process parameters and microbial community dynamics

İnce

Akyol

Özbayram

et al. 2019

Env Prog and Sustain Energy

View full text Add to dashboard Cite

The effects of selected process parameters (i.e., temperature, inoculum to substrate ratio [I:S], and inoculum source) on methane production and microbial community structure were investigated in lignocellulose-based anaerobic digestion tests. The results highlighted that dynamic response of microbial communities in changing process parameters subsequently affected anaerobic digestion performance. Co-inoculation of cow rumen fluid to the seed sludge improved the methane yield by 18%. The overall highest methane yield (278 mL CH 4 /g volatile solids) was obtained when cow rumen fluid was co-inoculated with anaerobic seed sludge with an I:S ratio of 1:2 at mesophilic temperature. Based on 16S rRNA gene amplicon sequencing results, Clostridium, Bacteroides, and Bacillus were the predominant bacterial genera in all anaerobic digesters. The highest relative abundances of Clostridum and Bacillus were detected in the thermophilic anaerobic digester. The relative abundance of Rikenella; known for high cellulolytic activity, was significantly higher only in the cow rumen fluid-added digester. Comparatively higher abundances of these lignocellulose-degraders synergistically affected volatile fatty acids as well as methane production in these anaerobic digestion set ups. Methanobacterium was the most abundant methanogen in the digesters inoculated only with anaerobic seed sludge; whereas, Methanobrevibacter dominated the digester that was co-inoculated with cow rumen fluid.

show abstract

“…The major transport and metabolic functions include amino acids, carbohydrates, inorganic ions, energy production and conversion, transcription, replication, recombination, and repair, representing the most active functions in the intestine ( Figure 8 ) ( S9 in the Supplementary material ). Cellulose degradation is mainly carried out by cellulase produced by anaerobic or aerobic microorganisms during biotransformation ( Abudi et al, 2018 ). In this process, carbohydrate transport and metabolism, inorganic ion transport and metabolism, energy production and transformation, coenzyme transport and metabolism play a dominant role ( Artzi et al, 2016 ).…”

Section: Resultsmentioning

confidence: 99%

Microbial gut diversity in four grasshopper species and its correlation with cellulose digestibility

Yao

et al. 2022

Front. Microbiol.

View full text Add to dashboard Cite

Grasshoppers are common pests, and their intestinal microbes have coevolved with them. These microorganisms have varied community structures, and they participate in the nutritional absorption and metabolism of grasshoppers. Here, we describe the gut microbiota diversity of four species of grasshoppers, Oxya chinensis, Pararcyptera microptera meridionalis, Gastrimargus marmoratus, and Calliptamus abbreviatus. We constructed a 16S rDNA gene library and analyzed the digestibility of cellulose and hemicellulose in grasshoppers using moss black phenol and anthrone colorimetry. The grasshopper with the highest microbial diversity in the gut among the four species was Oxya chinensis, and there were no significant differences in gut microbial diversity between the two geographic collections of Oxya chinensis. The most dominant phyla of the four grasshopper gut microorganisms were Proteobacteria, Bacteroidetes, and Firmicutes, and the most dominant genus was Enterobacter. The gut microbiota features of the four grasshoppers were correlated with their cellulose and hemicellulose digestibility. There was a significant positive correlation with cellulose digestibility for Pantoea. A significant negative correlation was found with cellulose digestibility for Acinetobacter, Enterococcus, Citrobacter, Serratia. A significant negative correlation was found with hemicellulose digestibility for Pantoea. This study contributes to the understanding of the structural composition of different species of grasshoppers gut microbiota, which may be useful for developing grasshopper digestive tracts as bioreactors for cellulose decomposition, improving the decomposition and utilization of agricultural straw, producing clean biomass energy, and processing biologically derived products.

show abstract

Effects of Alkali Pre-treatment, Total Solid Content, Substrate to Inoculum Ratio, and pH on Biogas Production from Anaerobic Digestion of Mango Leaves

Cited by 25 publications

References 44 publications

Co-digestion of Fruit and Tuber Waste for Biogas Enhancement: A Synergy Effect

Co-digestion of Fruit and Tuber Waste for Biogas Enhancement: A Synergy Effect

Enhancing methane production from anaerobic co‐digestion of cow manure and barley: Link between process parameters and microbial community dynamics

Microbial gut diversity in four grasshopper species and its correlation with cellulose digestibility

Contact Info

Product

Resources

About