Energetic and environmental benefits of co-digestion of food waste and cattle slurry: A preliminary assessment

Banks, C.J.; Salter, Andrew M.; Heaven, S.; Riley, Keith

doi:10.1016/j.resconrec.2011.09.006

Cited by 64 publications

(36 citation statements)

References 7 publications

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“…Co-digestion of OFMSW with cattle manure is commonly 217 adopted in wet digestion (Banks et al, 2011). On the other hand, co-digestion of waste having high N-218 content (food waste, vegetable waste, food processing industry waste and slaughterhouse waste) with 219 waste paper (typical mix of 95% to 5% respectively) is proposed for controlled dry digestion (Li et al, 220 2011;Takata et al, 2013), owing to its collateral benefits of adjusting the C/N ratio of the medium and 221 regulating the accumulation of both NH 3 and VFA in the reactor.…”

Section: Mixed-waste Digestate 215mentioning

confidence: 99%

Assessment and mitigation of the environmental burdens to air from land applied food-based digestate

Tiwary

Williams

Pant

et al. 2015

Environmental Pollution

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Highlights:· In situ air pollution assessment of land applied digestate is performed. · Environmental burden minimisation scenarios for digestate bio fertiliser presented. · Food-based digestate show high ammonia volatilisation potential. · Soil incorporated digestate effectively reduces NH 3 but elevates N 2 O emissions. · Managing digestate emissions mitigate both climate change and air pollution. Abstract (limit 150 words only)Anaerobic digestion (AD) of putrescible urban waste for energy recovery has seen rapid growth over recent years. In order to ascertain its systems scale sustainability, however, determination of the environmental fate of the large volume of digestate generated during the process is indispensable. This paper evaluates the environmental burdens to air associated with land applied food-based digestate in terms of primary pollutants (ammonia, nitrogen dioxide) and greenhouse gases (methane and nitrous oxide). The assessments have been made in two stages -first, the emissions from surface application of food-based digestate are quantified for the business as usual (BAU). In the next step, environmental burden minimisation potentials for the following three mitigation measures are estimated -mixed waste digestate (MWD), soil-incorporated digestate (SID), and post-methanated digestate (PMD). Overall, the mitigation scenarios demonstrated considerable NH 3 , CH 4 and N 2 O burden minimisation potentials, with positive implications for both climate change and urban pollution. Keywords: anaerobic digestion; bio fertilizer; digestate; environmental burdens; OFMSWCapsule abstract: In situ monitoring and analyses demonstrate the role of post-processing in greenhouse gases and air pollution mitigation from food-based digestate use as bio fertiliser. Highlights:· In situ air pollution assessment of land applied digestate is performed. · Environmental burden minimisation scenarios for digestate bio fertiliser presented. · Food-based digestate show high ammonia volatilisation potential. · Soil incorporated digestate effectively reduces NH 3 but elevates N 2 O emissions. · Managing digestate emissions mitigate both climate change and air pollution.3

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Section: Mixed-waste Digestate 215mentioning

confidence: 99%

Assessment and mitigation of the environmental burdens to air from land applied food-based digestate

Tiwary

Williams

Pant

et al. 2015

Environmental Pollution

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“…Different researchers have studied the co-digestion of manure with a wide variety of cosubstrates such as fruit and vegetable wastes (Callaghan et al, 2002), the organic fraction of municipal solid waste (Capela et al, 2008), food waste (Neves et al, 2009;Banks et al, 2011) and raw glycerin (Astals et al, 2012;Castrillón et al, 2011;Castrillón et al, 2013b). Studying the co-digestion of cattle slurries with fruit and vegetable wastes (FVW) and with chicken manure, Callaghan et al (2002), found that increasing the proportion of FVW from 20% to 50% improved the methane yield from 230 to 450 L CH 4 /kg VS. Capela et al (2008) evaluated the technical feasibility of anaerobic co-digestion with three types of organic solid waste under mesophilic conditions: the organic fraction of municipal solid waste (OFMSW), industrial sludge, and cattle manure.…”

Section: Introductionmentioning

confidence: 99%

“…Increasing the OFMSW in the mixture generally resulted in higher methane production and volatile solids reduction. Banks et al (2011) evaluated the feasibility of centralised pre-processing and pasteurisation of source-separated domestic food waste followed by transport to farms for anaerobic co-digestion with dairy cattle slurry. The results obtained showed that the addition of food waste improved energy yields per digester unit volume, with a corresponding increased potential for improving farm income by as much as 50%.…”

Section: Introductionmentioning

confidence: 99%

Effect of ultrasound pre-treatment in the anaerobic co-digestion of cattle manure with food waste and sludge

Quiroga

Castrillón

Fernández-Nava

et al. 2014

Bioresource Technology

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This paper present a study of the effect of applying ultrasound pre-treatment in the production of methane when co-digesting mixtures of cattle manure with food waste and sludge. A series of experiments were carried out under mesophilic and thermophilic conditions in continuously stirred-tank reactors containing 70% cattle manure, 20% food waste and 10% sewage sludge. Ultrasound pre-treatment allows operating at lower HRT, achieving higher volumetric methane yields: 0.85 L CH 4 /L.day at 36ºC and 0.82 CH 4 /L.day at 55ºC, when cattle manure and sewage sludge were sonicated. With respect to the non sonicated waste, these values represent increases of up to 31% and 67% for mesophilic and thermophilic digestion, respectively.

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“…Anaerobic digestion can effectively degrade farm wastes and concomitantly produce methane, thereby reducing the health and environmental risks while producing energy [1] [2]. Methane is produced in anaerobic digestion when organic matter is in high concentration [3].…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic Analysis of Anaerobic Co-Digestion of Animal Manure and Corn Stover Reveals Linkages between Bacterial Communities and Digestion Performance

Yang¹,

Chen²,

Yue³

et al. 2016

AiM

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Over 3 million tons of manures are produced annually in the United States and pose environmental and health risks if not remediated. Anaerobic digestion is an effective method in treating organic wastes to reduce environmental impacts and produce methane as an alternative energy. Previous studies suggested that optimization of feed composition, hydraulic retention time, and other operational conditions can greatly improve total solids removal and increase methane productivity. These environmental factors improve functionality by altering the microbial community structure but explicit details of how the bacterial community shifts are poorly understood. Our investigations were conducted to investigate the relationship between environmental factors, microbial community structure and bioreactor efficiency by using metagenomic analysis of the microbial communities. Our results indicated that the bioreactor with the greatest methane production, digestion efficiency and reduced levels of E. coli/Shigella had a distinctive community structure at the genus level with unique and abundant uncultivated strains of Bacteroidetes. Moreover the same bioreactor was enriched in Aminomonas paucivorans and Clostridia populations that can utilize secondary metabolites produced during cellulose/hemicellulose degradation to generate hydrogen and acetate. Hence specific digestion conditions that enrich for these populations may provide a route to the optimization of co-digestion systems and control the variability in reactor performance.

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Energetic and environmental benefits of co-digestion of food waste and cattle slurry: A preliminary assessment

Cited by 64 publications

References 7 publications

Assessment and mitigation of the environmental burdens to air from land applied food-based digestate

Assessment and mitigation of the environmental burdens to air from land applied food-based digestate

Effect of ultrasound pre-treatment in the anaerobic co-digestion of cattle manure with food waste and sludge

Phylogenetic Analysis of Anaerobic Co-Digestion of Animal Manure and Corn Stover Reveals Linkages between Bacterial Communities and Digestion Performance

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