Anaerobic co-digestion of food waste, poultry litter and sewage sludge: seasonal performance under ambient condition and model evaluation

Lohani, Sunil Prasad; Shakya, Siddhartha; Gurung, Prekshya; Dhungana, Bipasyana; Paudel, Dipti; Mainali, Brijesh

doi:10.1080/15567036.2021.1887976

Cited by 19 publications

(8 citation statements)

References 39 publications

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“…The biogas production estimate used was only for mono digestion of each of the substrates; however, several studies, including the present study, shown in Table 4, verify the fact that anaerobic co-digestion is an excellent optimization technique for enhanced biogas production and methane yield of organic wastes. The study done in an ambient condition also showed that anaerobic co-digestion was not only stable, but also increased the methane percentage by nearly 40-50% [60,70]. Hence, the biogas generation potential and fossil fuel replacement might increase exponentially if the co-digestion process is adopted and established in countries such as Nepal [5].…”

Section: Co-digestion In Achieving Sustainable Development Goals In N...mentioning

confidence: 91%

Anaerobic Co-Digestion of Food Waste with Livestock Manure at Ambient Temperature: A Biogas Based Circular Economy and Sustainable Development Goals

2022

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A shift from a linear economy to a circular economy of resource consumption is vital for diverting the value from lost resources to resource-efficient products towards developing a sustainable system. Household digesters provide one opportunity to create a biogas-based circular economy. Because household digesters are typically fed a wide and variable range of substrates, it is important to determine the ideal mixing ratios for them. In this study, an anaerobic digester startup process was analyzed and an assessment of anaerobic co-digestion of food waste with different livestock manures was carried out at ambient temperatures. Food waste (FW), cow manure (CM), poultry litter (PL) and goat manure (GM) were co-digested at mixing ratios (FW:PL:CM) of 2:1:1, 2:2:1, 1:1:2, 1:1:1 (wt/wt) and FW:PL:GM at mixing ratios of 2:1:1 and 1:1:2, at an organic loading rate of 1 g volatile solid (VS)/L/day, and 8% total solids. A maximum methane yield was obtained from co-digestion of FW:PL:GM at a mixing ratio of 2:1:1 in autumn-to-winter conditions, 21–10 °C, while the mixing ratio of FW:PL:CM at 2:2:1, showed negligible methane production under the same temperature condition. This study suggests that co-digestion of food waste and poultry litter with goat manure yields more biogas than other substrate combinations. Therefore, selecting suitable co-substrates with an optimized mixing ratio can promote several key indicators of a biogas-based circular economy towards achieving sustainable development goals 2, 3, 5, 6, 7, 9, 13 and 15.

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Section: Co-digestion In Achieving Sustainable Development Goals In N...mentioning

confidence: 91%

Anaerobic Co-Digestion of Food Waste with Livestock Manure at Ambient Temperature: A Biogas Based Circular Economy and Sustainable Development Goals

2022

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“…Being a renewable energy source, biogas can potentially act as a fossil fuel alternative for the sake of economic and environmental benefits and may be promoted. Studies on anaerobic codigestion to enhance biogas production have recently been reported (Hagos et al, 2017;Perin et al, 2020;Lohani et al, 2021;Singh et al, 2021). When employed as a cosubstrate and only substrate, FW has demonstrated positive outcomes, at least at the laboratory scale.…”

Section: Opportunities and Prospectsmentioning

confidence: 99%

Food Waste Valorisation for Biogas-Based Bioenergy Production in Circular Bioeconomy: Opportunities, Challenges, and Future Developments

et al. 2022

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The fossil fuel-based linear economy has inherent intricacies such as environmental pollution and the continued need for energy sourcing. Consequently, there has been a shift to a more sustainable circular bio-economy, in which biomass waste is valorised for energy generation while reducing the bulk waste materials and greenhouse gas emissions. In modern bioeconomy, biogas is a primary energy production vehicle. Bio-based economy-enabled technologies result in heat and electricity generation, considerable substitution of fossil fuels for transport, and also the manufacture of additional value-added products and byproducts of economic benefits. Wastes from industrial operations, agriculture, and other anthropogenic activities such as food waste (FW) can be biodigested and transformed into valuable energy sources, nutrient-rich manure, and speciality chemicals. However, for instance, although closed anaerobic membrane bioreactors can totally avoid a microbial runoff, membrane fouling frequently affects the hydraulic performance. Recent developments in anaerobic digestion (AD) of FW have diversified into pretreatment, organic loading, additive supplementation, parametric optimisation, and digestate recirculation to enhance the utility potential of biomass for energy and environment. These numerous anaerobic and microbial interventions support biomass valorisation and related processes, resulting in more efficient biomethanation. Valorisation of FW through biogas-based energy production could serve as an essential cog in the wheel of a circular bioeconomy.

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“…The two-stage process in which the acidogenic and methanogenic processes are physically separated appears to be effective, overcoming problems associated with single stage digestion [ 31 ]. The anaerobic digestion of mixtures of food waste, poultry litter, and sewage sludge enhanced the biogas yield to 640 L/kg VS when mixed in the ratio of 2:1:1, sewage sludge: food waste: poultry litter [ 32 ]. The anaerobic digestion of food waste for methane production at mesophilic temperature (34 °C) generated 276.5 mL CH 4 /g VS while 307.5 mL CH 4 /g VS was obtained at the thermophilic temperature of 55 °C [ 33 ].…”

Section: Food Waste Biorefinerymentioning

confidence: 99%

Food Waste Biorefinery: Pathway towards Circular Bioeconomy

Tsegaye

Jaiswal

2021

Foods

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Food waste biorefineries for the production of biofuels, platform chemicals and other bio-based materials can significantly reduce a huge environmental burden and provide sustainable resources for the production of chemicals and materials. This will significantly contribute to the transition of the linear based economy to a more circular economy. A variety of chemicals, biofuels and materials can be produced from food waste by the integrated biorefinery approach. This enhances the bioeconomy and helps toward the design of more green, ecofriendly, and sustainable methods of material productions that contribute to sustainable development goals. The waste biorefinery is a tool to achieve a value-added product that can provide a better utilization of materials and resources while minimizing and/or eliminating environmental impacts. Recently, food waste biorefineries have gained momentum for the production of biofuels, chemicals, and bio-based materials due to the shifting of regulations and policies towards sustainable development. This review attempts to explore the state of the art of food waste biorefinery and the products associated with it.

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Anaerobic co-digestion of food waste, poultry litter and sewage sludge: seasonal performance under ambient condition and model evaluation

Cited by 19 publications

References 39 publications

Anaerobic Co-Digestion of Food Waste with Livestock Manure at Ambient Temperature: A Biogas Based Circular Economy and Sustainable Development Goals

Anaerobic Co-Digestion of Food Waste with Livestock Manure at Ambient Temperature: A Biogas Based Circular Economy and Sustainable Development Goals

Food Waste Valorisation for Biogas-Based Bioenergy Production in Circular Bioeconomy: Opportunities, Challenges, and Future Developments

Food Waste Biorefinery: Pathway towards Circular Bioeconomy

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