A simple respirometric technique for assessing compost stability

Lasaridi, Katia; Stentiford, E. I.

doi:10.1016/s0043-1354(98)00143-2

Cited by 209 publications

(139 citation statements)

References 7 publications

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“…The results obtained showed an average air flow of 180 mol h -1 and 193 mol h -1 for n 1 and n 2 , respectively. Results provided by other authors on passive airflow are in the range of 1.5-0.7 mg dry air s -1 kg of dry material -1 for active composting materials (Barrington et al, 2003), whereas our results (expressed in these units) are approximately 0.3 mg dry air s -1 kg of dry material -1 , in accordance to the limited biological activity typically found in mature compost (Lasaridi and Stentiford, 1998).…”

Section: Development Of the Energy Balancesupporting

confidence: 89%

Prediction of temperature and thermal inertia effect in the maturation stage and stockpiling of a large composting mass

2006

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A macroscopic non-steady state energy balance was developed and solved for a composting pile of source-selected organic fraction of municipal solid waste during the maturation stage (13500 kg of compost). Simulated temperature profiles correlated well with temperature experimental data (ranging from 50 to 70ºC) obtained during the maturation process for more than 50 days at full scale. Thermal inertia effect usually found in composting plants and associated to the stockpiling of large composting masses could be predicted by means of this simplified energy balance, which takes into account terms of convective, conductive and radiation heat dissipation. Heat losses in a large composting mass are not significant due to the similar temperatures found at the surroundings and at the surface of the pile (ranging from 15 to 40ºC). In contrast, thermophilic temperature in the core of the pile was maintained during the whole maturation process. Heat generation was estimated with the static respiration index, a parameter which is typically used to monitor the biological activity and stability of composting processes. In this study, the static respiration index is presented as a parameter to estimate the metabolic heat that can be generated according to the biodegradable organic matter content of a compost sample, which can be useful in predicting the temperature of the composting process.

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Section: Development Of the Energy Balancesupporting

confidence: 89%

Prediction of temperature and thermal inertia effect in the maturation stage and stockpiling of a large composting mass

2006

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“…The results obtained in the MBT plant are similar to those found in composting processes . Other authors had previously found that COD did not show clear trends and did not allow any conclusions about compost stability (Lasaridi and Stentiford, 1998). In any case, it seems evident that these parameters should not be considered in the study of waste treatment plants based on biological process.…”

Section: Resultsmentioning

confidence: 86%

In search of a reliable technique for the determination of the biological stability of the organic matter in the mechanical–biological treated waste

Barrena

D’Imporzano

Ponsá

et al. 2009

Journal of Hazardous Materials

122

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The biological stability determines the extent to which readily biodegradable organic matter has decomposed. In this work, a massive estimation of indices suitable for the measurement of biological stability of the organic matter content in solid waste samples has been carried out. Samples from different stages in a Mechanical-Biological Treatment (MBT) plant treating municipal solid wastes (MSW) were selected as examples of different stages of organic matter stability in waste biological treatment.Aerobic indices based on respiration techniques properly reflected the process of organic matter biodegradation. Static and dynamic respirometry showed similar values in terms of aerobic biological activity (expressed as Oxygen Uptake Rate, OUR), whereas cumulative oxygen consumption was a reliable method to express the biological stability of organic matter in solid samples. Methods based on OUR and cumulative oxygen consumption were positively correlated. Anaerobic methods based on biogas production (BP) tests also reflected well the degree of biological stability, although significant differences were found in solid and liquid BP assays. A significant correlation was found between cumulative oxygen consumption and ultimate biogas production.The results obtained in this study can be a basis for the quantitative measurement of the efficiency in the stabilization of organic matter in waste treatment plants, including MBT plants, anaerobic digestion of MSW and composting plants.

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“…The biological stability is defined as the measure of the degree of decomposition of biodegradable organic matter contained in a matrix. 42 The degree of biological stability of waste materials can be directly measured by means of respirometric indices. 26,28,43 In the European legislation drafts 44 'stabilization' means the reduction of the decomposition properties of biowaste to such an extent that offensive odors are minimized and that the Dynamic Respiration Index (DRI) is below 1.0 g O 2 kg -1 OM h -1 .…”

Section: Exploring Energy and Environmental Burdens Related To Real Pmentioning

confidence: 99%

Determination of the energy and environmental burdens associated with the biological treatment of source-separated Municipal Solid Wastes

Colón

Cadena

Pognani

et al. 2012

Energy Environ. Sci.

144

104

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A simple respirometric technique for assessing compost stability

Cited by 209 publications

References 7 publications

Prediction of temperature and thermal inertia effect in the maturation stage and stockpiling of a large composting mass

Prediction of temperature and thermal inertia effect in the maturation stage and stockpiling of a large composting mass

In search of a reliable technique for the determination of the biological stability of the organic matter in the mechanical–biological treated waste

Determination of the energy and environmental burdens associated with the biological treatment of source-separated Municipal Solid Wastes

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