A life cycle approach to the management of household food waste – A Swedish full-scale case study

Bernstad, Anna; Jansen, Jes la Cour

doi:10.1016/j.wasman.2011.02.026

Cited by 239 publications

(105 citation statements)

References 26 publications

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“…Because not all of the total P in digestates is considered to be plant available, the solubility of P should be measured to avoid the overestimation of P availability from the digestates. For example, previous life cycle analyses have overestimated the P substitution by assuming that 100% of mineral fertilizer P is able to be substituted with digestates (Boldrin et al, 2011, Bernstad & la Cour Jansen 2011.…”

Section: Digestate Nutrient Concentrationsmentioning

confidence: 99%

“…In Europe the total digestate production in 2010 was 56 Mtonnes per year of which 80-97% was used in agriculture (Saveyn & Eder, 2014). The use of digestate in agriculture has been acknowledged as an efficient way to mitigate greenhouse gas emissions through material recycling, avoidance of mineral fertilizers and improvement of soil properties as reported in several life cycle analyses (Bernstad & la Cour Jansen, 2011, Boldrin et al, 2011, Evangelisti et al, 2014. However, proper digestate management, processing and spreading techniques are needed to avoid potential acidification and eutrophication impacts due to increased nutrient leaching (Abdullahi et al, 2008, Alburquerque et al, 2012a, Bernstad & la Cour Jansen, 2011, Boldrin et al, 2011, Haraldsen et al, 2011 which is dependent on the local soil quality and meteorological conditions as well as digestate characteristics (Evangelisti et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Agronomic characteristics of five different urban waste digestates

Tampio

Salo

Rintala

2016

Journal of Environmental Management

121

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The use of digestate in agriculture is an efficient way to recycle materials and to decrease the use of mineral fertilizers. The agronomic characteristics of the digestates can promote plant growth and soil properties after digestate fertilization but also harmful effects can arise due to digestate quality, e.g. pH, organic matter and heavy metal content. The objective of this study was to evaluate the differences and similarities in agronomic characteristics and the value of five urban waste digestates from different biogas plants treating either food waste, organic fraction of organic solid waste or a mixture of waste-activated sludge and vegetable waste. The digestate agronomic characteristics were studied with chemical analyses and the availability of nutrients was also assessed with growth experiments and soil mineralization tests. All studied urban digestates produced 5-30% higher ryegrass yields compared to a control mineral fertilizer with a similar inorganic nitrogen concentration, while the feedstock source affected the agronomic value. Food waste and organic fraction of municipal solid * Corresponding author. Tel.: +358 29 532 6573, E-mail address: elina.tampio@luke.fi 2 waste digestates were characterized by high agronomic value due to the availability of nutrients and low heavy metal load. Waste-activated sludge as part of the feedstock mixture, however, increased the heavy metal content and reduced nitrogen availability to the plant, thus reducing the fertilizer value of the digestate.

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Section: Digestate Nutrient Concentrationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Agronomic characteristics of five different urban waste digestates

Tampio

Salo

Rintala

2016

Journal of Environmental Management

121

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“…Sensitivity analyses 42 conducted to assess the split share of digestate total-N (i.e. organic-N, NH 4 -N and NO 3 -N) on 43 acidification potential have reported NH 3 and NO 3 as the main contributors to the enrichment of 44 pollutants in direct air and water environments respectively (Bernstad and la Cour Jansen, 2011;45 Evangelisti et al, 2014). Free ammonia concentration is affected mainly by temperature, pH and total 46 ammoniacal nitrogen (TAN) concentration (Chambers and Taylor, 2013).…”

mentioning

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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“…This investigation focuses on the handling and utilization of restaurant, catering facility, and kitchen biodegrad-able waste. Great potential is expected for a method of anaerobic fermentation widely used in biogas plants (Bernstad, La Cour Jansen 2011).…”

mentioning

confidence: 99%

Optimization of anaerobic fermentation of kitchen waste

Dlabaja¹,

Malaťák²

2013

Res. Agric. Eng.

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Dlabaja T., Malaťák J., 2013. Optimization of anaerobic fermentation of kitchen waste. Res. Agr. Eng., 59: 1-8.Anaerobic fermentation is a suitable method of energetic and material utilisation of waste coming from restaurants and canteens. Laboratory experiments of wet anaerobic fermentation were performed in a continuous reactor and in batch reactors under mesophilic conditions. Effects of hydraulic retention time, organic loading rate, period of feeding and recirculation of digestate were examined in the continuous reactor. Effects of substrate pre-treatment (crushing, heating, freezing) were examined in the batch reactors. Degree of substrate degradation ranged between 83-85% within hydraulic retention time of 2-30 days. Appropriate organic loading rate was found in the range 2-3 kg of volatile solids per m 3 /day. Recirculation of digestate (both an inoculum for fresh substrate and replacement of fresh water supply)caused an increase in ammonia concentration and led to immediate inhibition of the process. The results further showed a positive effect of substrate pre-treatment in the initial phase of fermentation. However, degree of degradation did not show a significant increase for the period of 20 days of fermentation.

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A life cycle approach to the management of household food waste – A Swedish full-scale case study

Cited by 239 publications

References 26 publications

Agronomic characteristics of five different urban waste digestates

Agronomic characteristics of five different urban waste digestates

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

Optimization of anaerobic fermentation of kitchen waste

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