Effect of reduced gas pressure on yield of biogas and other physicochemical parameters

Prajapati, Bala Ram; Sharma, Ram Kumar; Amatya, Iswar Man

doi:10.1007/s40095-020-00351-3

Cited by 4 publications

(2 citation statements)

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“…Approximately 800 mL of hydrogen was produced from 1.0 g of Calophyllum inophyllum oil cake [ 38 ], and 2.9–3.9 mL of hydrogen was produced from a 1.0 g volatile solid of acid–hydrolysate in coffee grounds [ 39 ]. Since the microflorae were found to show significant hydrolase activity, as mentioned below, the reason for the low biogas yield of our microflorae may be the increased gas pressure in the vial headspace [ 40 , 41 ] and lack of substrate pretreatment. Therefore, reducing the gas pressure and developing an optimal pretreatment method are indispensable for industrial-scale biogas production.…”

Section: Resultsmentioning

confidence: 99%

The Potential of Digested Sludge-Assimilating Microflora for Biogas Production from Food Processing Wastes

Hasaka,

Sakamoto,

Fujii

2023

Microorganisms

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Food processing wastes (FPWs) are residues generated in food manufacturing, and their composition varies depending on the type of food product being manufactured. Therefore, selecting and acclimatizing seed microflora during the initiation of biogas production is crucial for optimal outcomes. The present study examined the biogas production capabilities of digested sludge-assimilating and biogas-yielding soil (DABYS) and enteric (DABYE) microflorae when used as seed cultures for biogas production from FPWs. After subculturing and feeding these microbial seeds with various FPWs, we assessed their biogas-producing abilities. The subcultures produced biogas from many FPWs, except orange peel, suggesting that the heterogeneity of the bacterial members in the seed microflora facilitates quick adaptation to FPWs. Microflorae fed with animal-derived FPWs contained several methanogenic archaeal families and produced methane. In contrast, microflorae fed with vegetable-, fruit-, and crop-derived FPWs generated hydrogen, and methanogenic archaeal populations were diminished by repeated subculturing. The subcultured microflorae appear to hydrolyze carbohydrates and protein in FPWs using cellulase, pectinase, or protease. Despite needing enhancements in biogas yield for future industrial scale-up, the DABYS and DABYE microflorae demonstrate robust adaptability to various FPWs.

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Section: Resultsmentioning

confidence: 99%

The Potential of Digested Sludge-Assimilating Microflora for Biogas Production from Food Processing Wastes

Hasaka,

Sakamoto,

Fujii

2023

Microorganisms

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“…Anaerobic digestion (AD) is an ecologically acceptable alternative for vinasse management, as it transforms agribusiness residues into fertilizers and co-products of biotechnological interest. The co-products generated are alcohols and acids, of increasing value in the economic market, and biogas recognized as an environment-friendly source of energy (Prajapati et al 2020). Methane is a versatile fuel derived from biogas purification that can generate heat, electric energy, and vehicle fuel (Matsakas et al 2017).…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Microbiota profile in mesophilic biodigestion of sugarcane vinasse in batch reactors

Iltchenco

Peruzzo

Magrini

et al. 2021

Water Science and Technology

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The vinasse is a residue of ethanol production with the potential for methane production, requiring an allochthonous inoculum. Several microorganisms act in the different phases of anaerobic digestion, and the identification of these microbial communities is essential to optimize the process. The characterization of the microbiota involved in the biodigestion of vinasse was observed in the initial stage (IS), at the peak of methane production (MS) and the end of the process (FS) of the best performance assay by high-throughput sequencing. The highest methane production was 0.78 mmolCH4.gVS.h−1 at 243.7 h in the substrate/inoculum ratio of 1.7, with consumption partial of acetic, propionic and isobutyric acids and an 82% reduction of COD. High microbial diversity was found. The genus Clostridium, Acinetobacter, Candidatus Cloacamonas, Bacteroides, Syntrophomonas, Kosmotoga, the family Porphyromonadaceae and the class Bacteroidia were the most abundant in the maximum methane production. Methane production was driven by Methanobacterium and Methanosaeta, suggesting the metabolic pathways using were hydrogenotrophic and acetoclastic.

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Downstream Processing of Drop-In Biofuels

de Carvalho,

Karp,

Martínez-Burgos

et al. 2024

Biofuel and Biorefinery Technologies

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Effect of reduced gas pressure on yield of biogas and other physicochemical parameters

Cited by 4 publications

References 10 publications

The Potential of Digested Sludge-Assimilating Microflora for Biogas Production from Food Processing Wastes

The Potential of Digested Sludge-Assimilating Microflora for Biogas Production from Food Processing Wastes

Microbiota profile in mesophilic biodigestion of sugarcane vinasse in batch reactors

Downstream Processing of Drop-In Biofuels

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