A respirometric method for characterising the organic composition and biodegradation kinetics and the temperature influence on the biodegradation kinetics, for a mixture of sludge and bulking agent to be co-composted

Trémier, Anne; Guardia, A. de; Massiani, C.; Paul, Etienne; Martel, Jean-Luc

doi:10.1016/j.biortech.2004.05.005

Cited by 184 publications

(117 citation statements)

References 14 publications

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“…Composting of organic wastes is a traditional cost-effective way to reduce wastes and to reuse organic matter (Tremier, de Guardia, Massiani, Paul, & Martel, 2005;Suthar & Singh, 2008;Lillenberg et al, 2010). An attractive alternative to thermophilic composting is the application of certain epigeic earthworm species (Edwards, Subler, & Arancon, 2011;Ivask, Olle, & Nei, 2013).…”

Section: Introductionmentioning

confidence: 99%

Transformation of Nutrients and Organic Matter in Vermicomposting of Sewage Sludge and Kitchen Wastes

Haiba¹,

Ivask²,

Olle³

et al. 2014

JAS

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This study was conducted to compare how the nutrients and organic matter content in household kitchen wastes and sewage sludge transform in 120-days vermicomposting experiment. The concentrations of nitrogen, phosphorous and potassium increased during the experiment. The dry matter content of the composts decreased and the value of pH in the case of kitchen wastes increased and for sewage sludge vermicompost it remained almost unchanged. The amounts of organic matter and nutrients decreased to half of the initial masses, but the concentrations of nutrients increased remarkably both in kitchen wastes and in sewage sludge and sawdust mixtures as a result of vermicomposting. Vermicompost made from kitchen wastes contained 3.3% total nitrogen, 0.7% total phosphorous and 5.8% potassium. In the case of the vermicompost made from sewage sludge and sawdust the corresponding indicators were: 2.4% total nitrogen, 0.2% total phosphorous and 0.3% potassium. Small-scale vermicomposting of both household kitchen wastes and sewage sludge turned to be efficient.

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Section: Introductionmentioning

confidence: 99%

Transformation of Nutrients and Organic Matter in Vermicomposting of Sewage Sludge and Kitchen Wastes

Haiba¹,

Ivask²,

Olle³

et al. 2014

JAS

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“…Recent studies have focused of the study of surface compost temperatures of composting heaps and its relation to core temperatures (Turner et al, 2005) in an aerated active composting pile, with the aim of inferring pathogen deactivation, since important temperature gradients have been observed in large composting masses (Sommer et al, 2004). Other related works have studied the temperature effect on the biodegradation kinetics (Tremier et al, 2005) or the effect of turning on the temperature and oxygen profiles in composting (Avnimelech et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

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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“…In general, biodegradable samples with moisture below 35% on a wet weight basis will be biologically dormant and consequently, their respiration index will be falsely low (Gomez et al, 2006). Therefore, to maintain the growth and activity of microorganisms it is necessary to add water above all in compost processes (Liang et al, 2003;Tremier et al, 2005;Wagland et al, 2009) but sometimes, biodrying process water is added to promote aerobic fermentation in the hydrolytic stage by means of the recirculation of a part of the leachate generated (Zhang et al, 2009). …”

mentioning

confidence: 99%

Effect of airflow on biodrying of gardening wastes in reactors

Mendoza

Herrera-Prats

Robles-Martínez

et al. 2013

Journal of Environmental Sciences

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Biodrying consists of reducing moisture by using the heat from aerobic bio-degradation. The parameters that control the process are: aeration, temperature during the process, initial moisture of biowaste, and temperature and relative humidity of the input air. Lawn mowing and garden waste from the gardens of the University Jaume I, Castellón (Spain) were used as a substrate. Biodrying was performed in 10 reactors with known air volumes from 0.88 to 6.42 L/(min·kg dry weight (dw)). To promote aeration, 5 of the reactors had 15% of a bulking agent added. The experiment lasted 20 days. After the experiments it was found that the bulking agent led to greater weight loss. However, the increased airflow rate was not linearly proportional to the weight loss.

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A respirometric method for characterising the organic composition and biodegradation kinetics and the temperature influence on the biodegradation kinetics, for a mixture of sludge and bulking agent to be co-composted

Cited by 184 publications

References 14 publications

Transformation of Nutrients and Organic Matter in Vermicomposting of Sewage Sludge and Kitchen Wastes

Transformation of Nutrients and Organic Matter in Vermicomposting of Sewage Sludge and Kitchen Wastes

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

Effect of airflow on biodrying of gardening wastes in reactors

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