Organic Fraction of Municipal Solid Waste: Overview of Treatment Methodologies to Enhance Anaerobic Biodegradability

Paritosh, Kunwar; Yadav, Monika; Mathur, Sanjay; Balan, Venkatesh; Liao, Wei; Pareek, Nidhi; Vivekanand, Vivekanand

doi:10.3389/fenrg.2018.00075

Cited by 77 publications

(20 citation statements)

References 144 publications

(161 reference statements)

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“…The U.S. Environmental Protection Agency's (EPA) definition of municipal solid waste, however, does not include industrial, hazardous, or construction and demolition waste [16]. The organic fraction of municipal solid waste on the other hand, can be defined as the biodegradable fraction consisting of food waste, kitchen waste, leaf, grass clippings, flower trimmings and yard waste, of which food waste occupies the highest proportion [17].…”

Section: Organic Fraction Of Municipal Solid Waste (Ofmsw) and Food Wmentioning

confidence: 99%

Anaerobic Co-Digestion of Wastewater Sludge: A Review of Potential Co-Substrates and Operating Factors for Improved Methane Yield

et al. 2020

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Anaerobic digestion has been widely employed in waste treatment for its ability to capture methane gas released as a product during the digestion. Certain wastes, however, cannot be easily digested due to their low nutrient level insufficient for anaerobic digestion, thus co-digestion is a viable option. Numerous studies have shown that using co-substrates in anaerobic digestion systems improve methane yields as positive synergisms are established in the digestion medium, and the supply of missing nutrients are introduced by the co-substrates. Nevertheless, large-scale implementation of co-digestion technology is limited by inherent process limitations and operational concerns. This review summarizes the results from numerous laboratory, pilot, and full-scale anaerobic co-digestion (ACD) studies of wastewater sludge with the co-substrates of organic fraction of municipal solid waste, food waste, crude glycerol, agricultural waste, and fat, oil and grease. The critical factors that influence the ACD operation are also discussed. The ultimate aim of this review is to identify the best potential co-substrate for wastewater sludge anaerobic co-digestion and provide a recommendation for future reference. By adding co-substrates, a gain ranging from 13 to 176% in the methane yield was accomplished compared to the mono-digestions.

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Section: Organic Fraction Of Municipal Solid Waste (Ofmsw) and Food Wmentioning

confidence: 99%

Anaerobic Co-Digestion of Wastewater Sludge: A Review of Potential Co-Substrates and Operating Factors for Improved Methane Yield

et al. 2020

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“…OFMSW comprises a complex mixture of residues which can vary due to regional, seasonal and even socioeconomic factors [13]. Such variations can result in considerable changes in the composition of carbohydrates available for fermentation.…”

Section: Variation In the Concentration Of Total Sugars And La In Ofmmentioning

confidence: 99%

“…Nonetheless, in order to improve microbial conversions, the complex carbohydrate fraction needs to be first broken down i.e. hydrolysed, a step which has been established as the most significant part in the biogas production process [13].…”

Section: Introductionmentioning

confidence: 99%

From Upstream to Purification: Production of Lactic Acid from the Organic Fraction of Municipal Solid Waste

López‐Gómez

Unger

Schneider

et al. 2020

Waste Biomass Valor

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The implementation of an efficient and sustainable management of the organic fraction of municipal solid wastes (OFMSW) is a topic of intensive discussion in EU countries. Recently, the OFMSW has been investigated as a potential substrate for the production of lactic acid (LA) through fermentation. Nevertheless, none of the reports available in the literature covers all the stages of the conversion process. The present research article is a comprehensive study which includes the upstream, fermentation and downstream for the conversion of OFMSW into LA. Several batches of OFMSW were analysed for the evaluation of sugars released and LA content before the fermentation. Fermentations were performed to study the effect of hydrolysate quality on the LA production using Bacillus coagulans A166. Purification of LA, based on electrodialysis, was carried out after pilot scale fermentation of OFMSW hydrolysates. Results showed that variations in the concentrations of sugars and LA are observed from batch to batch of OFMSW. More specifically, LA can reach high concentrations even before the substrates are hydrolysed, limiting the potential applications of the final product due to low enantiomeric purities. In general, fermentations of the hydrolysate were efficient, with conversion yields of 0.65 g g −1 without the addition of extra nutrients. Downstream is still a challenging stage of the process. A LA recovery of 55% was obtained, with the most significant losses observed during the micro-and nanofiltrations. Overall, a conversion of 10% from OFMSW substrate (dry basis) to LA was achieved.

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“…Nevertheless, waste pretreatment itself requires energy. The energy demand of mechanical pretreatments tends to enhance as the waste lignocellulosic fraction increases, so as to vary in the range 5-80 kWh/ton of treated waste [47].…”

Section: Technical Considerations For the Scale Upmentioning

confidence: 99%

Press-extrusion pretreatment of the organic fraction of municipal solid waste for enhanced methane production

Cesaro

Cieri

Belgıorno

2020

J Mater Cycles Waste Manag

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Anaerobic digestion (AD) is a well-established process for the treatment of a wide variety of solid organic substrates, including the organic fraction of municipal solid waste (OFMSW). At industrial scale, the mechanical pretreatment is a fundamental step to reduce OFMSW particle size and to promote the hydrolysis within the subsequent AD process. Among the mechanical pretreatment technologies, press-extrusion has recently raised great interest for its possible application to either enhance the organic load to the digester or improve the overall process stability and methane yields. Aim of this study was in assessing the potential of the press-extrusion pretreatment to improve the performance of OFMSW anaerobic degradation. Batch tests were set up according to a full factorial design of experiments to assess the significance of the main operating parameters. The statistical analysis of results addressed further tests, carried out under semi-continuous feeding mode, to better discuss the possible application of press-extrusion for the greatest valorization of OFMSW under anaerobic conditions.

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Organic Fraction of Municipal Solid Waste: Overview of Treatment Methodologies to Enhance Anaerobic Biodegradability

Cited by 77 publications

References 144 publications

Anaerobic Co-Digestion of Wastewater Sludge: A Review of Potential Co-Substrates and Operating Factors for Improved Methane Yield

Anaerobic Co-Digestion of Wastewater Sludge: A Review of Potential Co-Substrates and Operating Factors for Improved Methane Yield

From Upstream to Purification: Production of Lactic Acid from the Organic Fraction of Municipal Solid Waste

Press-extrusion pretreatment of the organic fraction of municipal solid waste for enhanced methane production

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