Overall Heat Transfer Coefficients in Organic Substrates Composting

Mudhoo, Ackmez; Mohee, Romeela

doi:10.3808/jei.200700090

Cited by 21 publications

(9 citation statements)

References 48 publications

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“…The physical properties of compost sample in this study can be considered as mature. As other studies also found that compost with odorless, a fine texture and dark colour is matured compost (33). This study also found that short period formation of compost compared to traditional method was due to the precomposting process applied during the first period of the study in which the minimization process from grinding caused the large particles into smaller pieces.…”

Section: Color Texture and Odorsupporting

confidence: 51%

The Discovery of Physical Properties of Food Waste in Composting Process

Firdaus¹,

Samah²,

Hamid³

et al. 2018

IJET

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Composting as a method of solid waste management should be given attention. It gives means of producing a valuable end product, by treating of organic wastes in an environmentally friendly method which does not release any hazardous chemical which can affect human health without causing a major disruption to the surrounding ecosystem. Nevertheless, the issue of time-consuming arises and this correspond to the sink of market demand. The optimized pre-composting process was done through drying, grinding and controlled aeration resulted in the fast-compost formation and cost-effective. This study aimed to discover the physical properties of food waste in composting process. The controlled parameter of the composting which is aeration time where pre-composting processes applied was drying and grinding. The manipulated parameter of composting process happened within two durations: rotation and rest. Each container has been rotated for 15 minutes yet different resting time was applied which are 15, 25, 50, 150 minutes namely A, B, C and D. The data collection has been done in hourly basis for the total of 72 hours. Based on the statistical analysis, results show that mass reduction of samples (A=38.6%, B=32.6%, C=24.6%, D=22.6%). The compost temperature ranged between (23°C -39°C) while the compost pH was (5.12 -5.85). Peak level of surrounding temperature was (35.7°C) while surrounding relative humidity (53%) in normal condition. Among the highest moisture content was (52.63%) while the lowest discovered in sample D (24.81%) respectively. Results show that with the longer the aeration time, the better physical properties of compost formed. The obtained data will provide evidence on its significances application to the agencies, the public and the industrial player to cope up with this major environmental threat. This study found a significant relationship between physical factors and compost formation which contribute to better analysis, especially to food waste management.

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Section: Color Texture and Odorsupporting

confidence: 51%

The Discovery of Physical Properties of Food Waste in Composting Process

Firdaus¹,

Samah²,

Hamid³

et al. 2018

IJET

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“…Oxygen and carbon dioxide inflows were determined by the air flow and standard air composition. The overall heat transfer of the surface (UA) was determined using the surface area of the compost mixture and a standard value for the U coefficient (Mudhoo and Mohee, 2007) which was within the range of 238-720 kJ/d°C reported in the literature (Kaiser, 1996;Zhang et al, 2010). Note that this term can be useful in designing of composting systems, since can predict the wall losses of the heat and thus could lead to the selection of the proper surface area of the compost.…”

Section: Model Inputsmentioning

confidence: 99%

Mathematical modeling of olive mill waste composting process

et al. 2015

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“…According to the reported number for the thermal capacity of the SMC and water in references (Mudhoo & Mohee, 2007), the thermal capacity (C) of the solution inside the reactor was calculated at 3.56 (Kj/Kg K). Here, m is the mass of the materials inside the reactor and is equal to 24,000 kg, T s is the inside temperature and is equal to 35°C or 55°C, and T in is the initial temperature of the substrate.…”

Section: Heat Transfer In the Designed Reactormentioning

confidence: 99%

Spent mushroom compost (SMC) as a source for biogas production in Iran

Najafi

Ardabili

Shamshirband

et al. 2019

Engineering Applications of Computational Fluid Mechanics

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The first aim of the present study is to investigate the feasibility of the biogas production potential from Spent Mushroom Compost. Hence, its secondary aim is to study the replacement of this energy with the fossil energy source and its impact on the reduction of greenhouse gases emission. The production potential of biogas was evaluated in a laboratory-scale Open Outlet Flow Batch Type Anaerobic digester. Setups of biogas production were set at temperatures of 35°C and 55°C. Results indicate that the cumulative production of biogas at 55°C was more than that at 35°C (364.8 and 314.11 L/kg.VS, respectively). The energy required for 1 ton of spent mushroom compost in one period of production was 204.24-5.35T kW.h/ton. The amount of energy produced in a period of biogas production was calculated to be 277.95 kW.h/ton at 35°C and 322.84 kW.h/ton at 55°C. Results show that the total produced spent mushroom compost of the country is equal to 414,491.7 tons per year. Accordingly, the potential of methane production was calculated to be 8690.8 × 103 m 3 per year. It can also reduce 0.02% of the total annual production of CO 2 in Iran. ARTICLE HISTORY

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Overall Heat Transfer Coefficients in Organic Substrates Composting

Cited by 21 publications

References 48 publications

The Discovery of Physical Properties of Food Waste in Composting Process

The Discovery of Physical Properties of Food Waste in Composting Process

Mathematical modeling of olive mill waste composting process

Spent mushroom compost (SMC) as a source for biogas production in Iran

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