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Modelling of pilot-scale anaerobic food wastes composting process with dry leaves or cow manure


Citation

Lim, Wei Jie and Chin, Nyuk Ling and Yusof, Yus Aniza and Yahya, Azmi and Tee, Tuan Poy (2019) Modelling of pilot-scale anaerobic food wastes composting process with dry leaves or cow manure. Pertanika Journal of Science & Technology, 27 (1). pp. 421-442. ISSN 0128-7680; ESSN: 2231-8526

Abstract / Synopsis

Anaerobic composting is a promising method to fully transform food wastes into useful materials such as biofertilizer and biogas. In this study, the optimum proportions of food wastes containing vegetable, fruit and meat wastes with dry leaves or cow manure for composting were determined using the simplex centroid design and response optimizer. The effectiveness of the pilot-scale composting process was evaluated based on the targeted compost quality of C/N ratio at 21, pH value at 8 and electrical conductivity of 1 dS/m. Food wastes composting formulation with dry leaves suggested high percentage of dry leaves, 86.9% with low food wastes composition of 13.1% constituted by vegetable waste (1.1%), fruit waste (4.9%) and meat waste (7.1%). With cow manure formulation, only 6% of cow manure was recommended with another 94.0% of food wastes contributed by a fair mix of vegetable waste (23.2%), fruit waste (34.3%) and meat waste (36.5%). The developed regression models were experimentally validated with predicted responses obtained in acceptable ranges for C/N ratio (21.2 - 21.8), pH (7.92 - 7.99) and electrical conductivity (0.97 - 1.03 dS/m).


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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
Faculty of Engineering
Publisher: Universiti Putra Malaysia Press
Keywords: Biofertilizer; Biogas; Mixture design; Response surface optimization; Simplex centroid design
Depositing User: Nabilah Mustapa
Date Deposited: 08 Mar 2019 14:27
Last Modified: 08 Mar 2019 14:27
URI: http://psasir.upm.edu.my/id/eprint/67238
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