Thermally enhanced solubilization and anaerobic digestion of organic fraction of municipal solid waste

Ahmed, Bahar; Tyagi, Vinay Kumar; Aboudi, Kaoutar; Naseem, Azmat; Álvarez-Gallego, Carlos José; Fernández-Güelfo, Luis Alberto; Kazmi, A.A.; Romero, L.I.

doi:10.1016/j.chemosphere.2021.131136

Cited by 38 publications

(8 citation statements)

References 127 publications

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“…Many different groups of microorganisms are involved in the AD process, and the sensitive balance among different groups of microorganisms is important for a stable and efficient AD process (Venkiteshwaran et al, 2015 ). The temperature regime can have crucial effects on physical, chemical, and microbiological parameters (Ahmed et al, 2021 ; De Vrieze et al, 2015 ; De Vrieze & Verstraete, 2016 ). To concurrently ensure process stability and high biogas yields, biogas plants are mostly operated at mesophilic (20–45°C) or thermophilic temperatures (45–60°C) (Chapleur et al, 2016 ), whereby mesophilic AD is the most common process (Kirchmeyr et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Meso‐ and thermophilic posttreatment of press water coming from a thermophilic municipal solid waste digester

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Markt,

Wunderer

et al. 2023

Biotech & Bioengineering

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An efficient biogas production out of organic (waste) materials is important to contribute to a carbon‐neutral future. In this study, thermophilic press water (PW) coming from an organic fraction of the municipal solid waste digester was further digested in a thermo‐ and mesophilic posttreatment approach using two semicontinuous 14 L digesters. The results showed that the PW can still have considerable high biogas potential—at least during the touristic high season in central Europe. The change in temperature led to an increase in volatile fatty acid concentrations and a decrease in biogas production in the mesophilic approach in the first days. However, the losses in biogas production at the beginning could be compensated thus there were no considerable differences in biogas production between thermo‐ and mesophilic posttreatment at the end of incubation. This can most probably be contributed to a change in the microbial community, and potentially problematic intermediates like valerate could be better degraded in the mesophilic reactor. Especially the abundance of representatives of the phylum Bacteroidota, like Fermentimonas spp., increased during mesophilic anaerobic digestion.

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Section: Introductionmentioning

confidence: 99%

Meso‐ and thermophilic posttreatment of press water coming from a thermophilic municipal solid waste digester

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Markt,

Wunderer

et al. 2023

Biotech & Bioengineering

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“…In most of the developing countries, methods such as landfill, dumping, incineration and compost are chosen for domestic solid waste disposal (Braguglia et al 2018). These methods pose serious hazards due to various reasons such as unsuitable land conditions for storage in urban areas, mixing of leachate into groundwater, and release of greenhouse gases and other polluting gases into the environment (Ahmed et al 2021). In addition to these, the continuous increase in energy demand increases the interest of local governments in the environmental dimension of these wastes as well as in the issue of energy recovery from organic fractionated wastes.…”

Section: Introductionmentioning

confidence: 99%

Waste to Value Added Products: Graphene

2022

PICLLE-22,PICIES-22, PNMBE-22, ASETH-2022, AEHSSE-22, GBMEL-22 &Amp; MICAST-2022 June 2022 International Conferences

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Globally, approximately 2 billion tons of solid waste is generated annually, of which 34-53% is composed of biodegradable organic materials (Abad et al. 2019). Organic fractions of municipal solid wastes (OFMSW); It consists of waste from food production, household residues from food preparation, leftovers, expired food, waste from restaurants and food outlets. While more than 100 billion tons of resources are transferred to the economy every year, more than 60% of them are waste and result in an increase in greenhouse gas emissions, which is one of the triggers of the climate crisis. EU; to improve sustainability in solid waste management, it has promoted some directives (1999/31/EC) to reduce production, encourage recycling, encourage resource selection and reduce biodegradable waste sent to landfill. The EU's aim for 2050 is to be the carbon neutral first continent, and in this direction, it plans all its policies under the name of "Green Deal". The Green Deal describes a framework that includes emission reduction, circular economy, zero pollution, transformation of agriculture and rural areas, sustainable transport, energy transition and financing all of these. In this context, the circular economy plays an important role in providing a conceptual way to minimize environmental impact and maximize resource (energy and material) recovery from solid waste. The anaerobic digestion (AD) process metabolizes the OFMSW to energy-rich biomethane and carbon dioxide by several microbial steps. The intermediates of AD can be transformed into value-added products, such as biofuels, biogas, bioethanol, etc. This review presents alternative value-added products such as "graphene" using biomethane from biogas by anaerobically digested OFMSW. This will close the loop of the life cycle of OFSMW via attaining a sustainable circular economy with a product with higher added value than biomethane. With this respect, the separation route of biomethane in transforming OFSMW into value-added products and graphene production techniques from biomethane are briefly assessed.

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“…Anaerobic digestion (AD) technology allows the treatment of the organic fraction of municipal solid waste (OFMSW) and the production of methane‐rich biogas and fertilizer for agricultural use 9,10 . The large‐scale implementation of AD of the OFMSW, of which food waste (FW) represents a significant part, is a challenge for dissemination of the technology, especially owing to the low biodegradation associated with the presence of lignocellulosic compounds in the solid phase 11,12 .…”

Section: Introductionmentioning

confidence: 99%

“…7,8 Anaerobic digestion (AD) technology allows the treatment of the organic fraction of municipal solid waste (OFMSW) and the production of methane-rich biogas and fertilizer for agricultural use. 9,10 The large-scale implementation of AD of the OFMSW, of which food waste (FW) represents a significant part, is a challenge for dissemination of the technology, especially owing to the low biodegradation associated with the presence of lignocellulosic compounds in the solid phase. 11,12 Regarding the process stability and efficiency, the use of FW as a substrate in AD reactors shows some problems associated with the accumulation of volatile fatty acids and the inhibition of methane production, 13 particularly in the start-up of batch garage-type reactors, where unbalanced conditions occur owing to the rapid degradation of easily degradable compounds.…”

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confidence: 99%

Determination of the biochemical methane potential of food waste after aerobic storage and aeration pretreatment

Oliveira

Léo

Forster‐Carneiro³

et al. 2022

Biofuels Bioprod Bioref

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Food waste represents a relevant fraction of municipal solid organic waste, and anaerobic digestion can be an eco-friendly alternative for sustainable management in a circular economy framework. One of the challenges to the implementation of anaerobic digestion is the availability of easily degradable compounds in the substrate, which can be solved by the application of pretreatment to increase methane production. In this study, the influence of aerobic storage time and forced continuous aeration pretreatment on the biochemical methane potential of food waste was evaluated. The results demonstrate an increase in the methane production concerning the total volatile solids (TVS) of food waste stored for 7 days (425 NmL CH 4 g −1 TVS) compared with fresh samples without pretreatment (375 NmL CH 4 g −1 TVS). The adoption of forced and continuous aeration pretreatment on food waste for 4 days produced 456 NmL CH 4 g −1 TVS for the leachate, 1.22-fold higher than that for the food waste without storage. In conclusion, the application of aeration pretreatment previous to anaerobic digestion can be an alternative to increase the methane potential from food waste.

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Thermally enhanced solubilization and anaerobic digestion of organic fraction of municipal solid waste

Cited by 38 publications

References 127 publications

Meso‐ and thermophilic posttreatment of press water coming from a thermophilic municipal solid waste digester

Meso‐ and thermophilic posttreatment of press water coming from a thermophilic municipal solid waste digester

Waste to Value Added Products: Graphene

Determination of the biochemical methane potential of food waste after aerobic storage and aeration pretreatment

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