Microbiology and biochemistry of anaerobic digesters: an overview

Achinas, Spyridon; Achinas, Vasileios; Euverink, Gerrit Jan Willem

doi:10.1016/b978-0-12-821264-6.00002-4

Cited by 29 publications

(15 citation statements)

References 37 publications

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“…The saccharolytic and hydrolytic degraded those content into oligomers and monomers such as cellobiose, glucose, amino acids, purines, pyrimidines, fatty acids, and glycerol [56]. The cellulose and hemicellulose are commonly converted by cellulolytic microflora from the phylum of Firmicutes commonly Ruminococcaceae and Clostridiaceae families 17 such as from genus Clostridium, Ruminococcus, Cellobacterium, Butyrivibrio, Fibrobacter, and Acetivibrio [57][58][59]. The starch could be degraded by the genus Thermoanaerobacterium, Succinimonas, Ruminobacter, Bacteroides, Prevotella, Bacteroides, Clostridium, and Butyrivibrio.…”

Section: Methane Production Enhancementmentioning

confidence: 99%

“…The species from those genera also could degrade the other polymer such as lignin and its derived products especially the species from Lysinibacillus and Paenibacillus. The hydrolytic and dissipotrops as primary anaerobes process digest the cellobiose, glucose, amino acids, purines, pyrimidines, fatty acids, and glycerol and produce organic acid such as butyrate, succinate, lactate, pyruvate acetate, propionate, and lactate; aromatic compounds; the alcohol form such as ethanol, propanol, butanol, and methanol; carbon dioxide; hydrogen; and also produced volatile fatty acids (VFAs) [59] which dominate the degradation of cellulose. The alcohol form, VFAs, lactate, and succinate continued to degrade into single carbon compounds and hydrogen and acetate through the syntrophic process.…”

Section: Methane Production Enhancementmentioning

confidence: 99%

See 1 more Smart Citation

Steam Explosion Pretreatment: Biomass Waste Utilization for Methane Production

Sholahuddin¹,

Nakamura²,

Asada³

2022

Biomass, Biorefineries and Bioeconomy

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Lignocellulosic biomass as a second-generation biofuel resource such as waste from agricultural, forester industry, and unutilized wood and non-wood biomass was widely reported to use it as feedstock for methane production. As the carbon-neutral resources, biomass waste conversion for biofuel is in line with the SDGs 7 and 15 goal that can meet the needs and qualify to the standard of sustainable consumption and production pattern, and increasing the renewable energy. The wood and non-wood unutilized biomass and biomass waste are commonly faced with the recalcitrant character of the lignocellulose complex (LCC) which impacted the digestion process of the methane fermentation. Steam explosion pretreatment was enhanced the methane production by breaking the LCC into cellulose, hemicellulose, and lignin-derived product generated from the pretreatment process. Those steam-exploded products were reported effective in the conversion process into methane. The combination of steam explosion pretreatment which is an environmentally friendly pretreatment, and the use of carbon-neutral resources will provide the green biofuel which helps decrease the greenhouse gasses from the biomass waste dumping process and convert it into sustainable biofuel i.e. methane. This chapter will describe the steam explosion system development on the utilization of biomass for methane production, and the action of methane production enhancement.

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Section: Methane Production Enhancementmentioning

confidence: 99%

Section: Methane Production Enhancementmentioning

confidence: 99%

Steam Explosion Pretreatment: Biomass Waste Utilization for Methane Production

Sholahuddin¹,

Nakamura²,

Asada³

2022

Biomass, Biorefineries and Bioeconomy

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“…AD is a conversion process that organic matter of waste was transformed into methane-rich biogas with the absence of oxygen [ 214 , 215 ]. Recently, biochar being applied in the AD system for bio-waste energy recycling has caused attention.…”

Section: Role Of Bioengineered Biochar In Waste Recyclingmentioning

confidence: 99%

Bioengineered biochar as smart candidate for resource recovery toward circular bio-economy: a review

et al. 2021

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Biochar’s ability to mediate and facilitate microbial contamination degradation, as well as its carbon-sequestration potential, has sparked interest in recent years. The scope, possible advantages (economic and environmental), and future views are all evaluated in this review. We go over the many designed processes that are taking place and show why it is critical to look into biochar production for resource recovery and the role of bioengineered biochar in waste recycling. We concentrate on current breakthroughs in the fields of engineered biochar application techniques to systematically and sustainable technology. As a result, this paper describes the use of biomass for biochar production using various methods, as well as its use as an effective inclusion material to increase performance. The impact of biochar amendments on microbial colonisation, direct interspecies electron transfer, organic load minimization, and buffering maintenance is explored in detail. The majority of organic and inorganic (heavy metals) contaminants in the environment today are caused by human activities, such as mining and the use of chemical fertilizers and pesticides, which can be treated sustainably by using engineered biochar to promote the establishment of a sustainable engineered process by inducing the circular bioeconomy.

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“…Apart from the biogas, the AD system offers a wide range of environmental benefits, which includes the reduction in the emissions of greenhouse gases and a high degree of removal of pathogenic microorganisms [8,9], reduction of the amount of biodegradable waste entering sanitary landfills and therefore mitigate resultant environmental impacts, provides nutrient-rich solid digestate for soil amendment to improve soil fertility and nutrient-rich liquid digestate (LD) for crop irrigation,thus contributing to food security [10].…”

Section: Fig 1schematic Diagram Of Anaerobic Digestionmentioning

confidence: 99%

Assessment of the Quality of Liquid Digestate from Small-scale Anaerobic Biodigesters Used for Crop Irrigation in Urban and Peri-urban Maseru, Lesotho

Tanor

Lejone

Magama

et al. 2021

CJAST

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Objective: The aim of the study was to determine the quality of Liquid Digestate (LD) from selected small scale anaerobic digesters for biogas production and assess the suitability for crop irrigation. Methodology: The selection of the parameters was guided by national standards and international guidelines for the agricultural use of wastewater and wastewater treatment products. The analysis was carried out using standard methods. Results: The results showed that most of the parameters determined of the LD from the anaerobic reactors were within the ranges of the national standards and the FAO recommended guideline limits for crop irrigation with wastewater; pH (6.75-8.50), alkalinity 12.5-45.7 mg/L), EC 0.39-1.30dS/m), COD (82.3-158.0 mg.O2/L, SS (1.35-6.17 mg/L) and TDS (249.6-832.0 mg/L). The LD from the reactors contain some considerable amounts of plant nutrients; total nitrogen (11.5- 33.1 mg/L), ammonium nitrogen (2.3-22.0 mg/L), total phosphorous (1.5-121.6 mg/L) calcium (37.68-438 mg/L), magnesium (15.25-127-36 mg/L), sodium (4.67-32.47 mg/L), chloride (9.30-19.5 mg/L) and potassium (12.07-39.50 mg/L). The mean concentrations of the micronutrients cobalt (0.67-0.94 mg/L), copper (0.78-1.08 mg/L), iron (0.851.93 mg/L), manganese (0.09-0.20 mg/L), nickel (0.82-1.48 mg/L) and zinc (0.31-2.24 mg/L) were greater than the FAO guideline limits for wastewater used in crop irrigation, which suggests that the LD are potential low-cost biofertilizer. The level of toxic metals arsenic (0.65-0.87 mg/L), cadmium (0.70-0.97 mg/L), chromium (0.71-0.98 mg/L) and lead (0.55-1.46 mg/L), were higher than the recommended levels for use of treated wastewater in crop irrigation. The numbers of the common pathogenic microorganisms determined were much lower than the FAO and WHO recommended limits indicating that the liquid digestate will not pose any major health risk a biofertilizer. Conclusion: The nutrients and other parameters indicated that the quality of the LD is good enough to be used for crop irrigation without any restrictions.However, the LD should be used with caution, because of the levels of the toxic metals, which may accumulate in the soil after prolonged application. Also, extension services on best practices for the agricultural application of the LD should be made available to potential users to mitigate any potential negative environmental and health impacts.

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Microbiology and biochemistry of anaerobic digesters: an overview

Cited by 29 publications

References 37 publications

Steam Explosion Pretreatment: Biomass Waste Utilization for Methane Production

Steam Explosion Pretreatment: Biomass Waste Utilization for Methane Production

Bioengineered biochar as smart candidate for resource recovery toward circular bio-economy: a review

Assessment of the Quality of Liquid Digestate from Small-scale Anaerobic Biodigesters Used for Crop Irrigation in Urban and Peri-urban Maseru, Lesotho

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