Decentralized energy from portable biogas digesters using domestic kitchen waste: A review

Ajay, C.M.; Mohan, Sooraj; Dinesha, P.

doi:10.1016/j.wasman.2021.02.031

Cited by 62 publications

(20 citation statements)

References 116 publications

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“…The biogas production depends on the AD complete process because it produces CH4 and CO2. Methane is produced in the 6.8-7.2 pH range (Ajay et al, 2021;Allah et al, 2021). Efficient methane production depends on the reactor's stability, with pH as the crucial factor (Ali et al, 2019), and is sensitive to pH changes (Ajay et al, 2021).…”

Section: Biogas Formation Ratementioning

confidence: 99%

“…Methane is produced in the 6.8-7.2 pH range (Ajay et al, 2021;Allah et al, 2021). Efficient methane production depends on the reactor's stability, with pH as the crucial factor (Ali et al, 2019), and is sensitive to pH changes (Ajay et al, 2021). Anaerobic digestion involves the degradation of organic substances through microorganisms, especially anaerobic microorganisms.…”

Section: Biogas Formation Ratementioning

confidence: 99%

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Biodigestion of Mixed Substrates of Cow Manure-Delignified Spent Coffee Ground (DSCG) using Microorganism Enhancer for Biogas Production and Its Kinetic Study

Sumantri

Kusnadi

Handoyo

et al. 2022

EREM

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Environmentally benign energy strategies have been implemented to cope with the rapidly increased global energy needs. Indonesia’s coffee consumption has triggered an increase in the generation of spent coffee ground (SCG) that can be used as a biogas raw material. The novelty that we offer in this research effort is to reduce the premature formation of biogas, so that we can extend the biogas production period during the digestion of spent coffee ground by adjusting the right pH and digestion time. This study aimed to produce biogas from an organic substrate mixture containing cow manure and SCG with a 25:1 C/N ratio by employing effective microorganisms-4 (EM-4). The process began with delignification of SCG using sodium hydroxide solution to obtain delignified SCG (DSCG). The biodegradation of the substrate was performed in an anaerobic batch digestion (AD) system at ambient temperature by varying pH (5, 7, and 9) and EM-4 concentration (6%, 9%, and 12%). The biogas product and chemical oxygen demand measurements were carried out every two days for 60 days of digestion. The results showed that the increase in EM-4 concentration induced earlier initial biogas production enhanced the volume, and extended the production time. The pH 7 level and 9% EM-4 loading gave the ideal digestion substrate condition containing cow manure and SCG with a 25:1 C/N ratio to obtain 11.28 mL of biogas/g COD with 100.2% production enhancement. The modified Gompertz equation fitted the experimental data very well as indicated by a high value of the coefficient of determination (R2 > 0.95).

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Section: Biogas Formation Ratementioning

confidence: 99%

Section: Biogas Formation Ratementioning

confidence: 99%

Biodigestion of Mixed Substrates of Cow Manure-Delignified Spent Coffee Ground (DSCG) using Microorganism Enhancer for Biogas Production and Its Kinetic Study

Sumantri

Kusnadi

Handoyo

et al. 2022

EREM

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“…According to the Food and Agriculture Organization (FAO) of the United Nations, currently the global volume of food wastage amounts to about 1.6 billion tonnes per year, with carbon footprint estimated to be 3.3 billion tonnes of CO 2 equivalents. Kitchen waste, a major component of municipal solid waste, includes food waste and peels (Ajay et al 2021). These organic wastes are discharged from various sources including households, schools, restaurants, and leftovers from food industries.…”

Section: Introductionmentioning

confidence: 99%

“…Three main processes are used to treat and dispose kitchen waste, i.e., anaerobic digestion, composting, and feedification (Ajay et al 2021). Although composting is proposed to reduce greenhouse gas emissions and is adapted to decentralized kitchen waste treatments, the composting process produces malodorous gases such as ammonia (NH 3 ) and hydrogen sulfide (H 2 S) (Yuan et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Feeding kitchen waste to animals is not desirable neither, due to the protein homogeneous pollution, which is a potential risk for disease transmission from animals that consume animal-derived feed produced from the meat, bone, blood, and other animal tissues (Jin et al 2021). Kitchen waste is a suitable substrate for anaerobic digestion since it is enriched in biomass, carbon, moisture and is generally biodegradable (Ajay et al 2021). Anaerobic digestion also has a lower global warming footprint than composting and landfilling (Edwards et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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Anaerobic digestion and recycling of kitchen waste: a review

et al. 2022

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About 1.6 billion tons of food are wasted worldwide annually, calling for advanced methods to recycle food waste into energy and materials. Anaerobic digestion of kitchen waste allows the efficient recovery of energy, and induces low-carbon emissions. Nonetheless, digestion stability and biogas production are variables, due to dietary habits and seasonal diet variations that modify the components of kitchen waste. Another challenge is the recycling of the digestate, which could be partly solved by more efficient reactors of anaerobic digestion. Here, we review the bottlenecks of anaerobic digestion treatment of kitchen waste, with focus on components inhibition, and energy recovery from biogas slurry and residue. We provide rules for the optimal treatment of the organic fraction of kitchen waste, and guidelines to upgrade the anaerobic digestion processes. We propose a strategy using an anaerobic dynamic membrane bioreactor to improve anaerobic digestion of kitchen waste, and a model for the complete transformation and recycling of kitchen waste, based on component properties.

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Anaerobic Digestion: Addressing the Problem of Food Waste by Converting it into Biogas

Patil,

Sutar

2023

Techno-Societal 2022

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Decentralized energy from portable biogas digesters using domestic kitchen waste: A review

Cited by 62 publications

References 116 publications

Biodigestion of Mixed Substrates of Cow Manure-Delignified Spent Coffee Ground (DSCG) using Microorganism Enhancer for Biogas Production and Its Kinetic Study

Biodigestion of Mixed Substrates of Cow Manure-Delignified Spent Coffee Ground (DSCG) using Microorganism Enhancer for Biogas Production and Its Kinetic Study

Anaerobic digestion and recycling of kitchen waste: a review

Anaerobic Digestion: Addressing the Problem of Food Waste by Converting it into Biogas

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