Comparative study on passive aerated in-vessel composting of food wastes with the addition of Sabah ragi

Mohd Al Mussa Ugak and Abu Zahrim Yaser and Junidah Lamaming and Ernest Kelly Subin and Mariani Rajin and Sariah Saalah and Wong, Hock Tze @ Farrah Wong and Sariah Abang (2022) Comparative study on passive aerated in-vessel composting of food wastes with the addition of Sabah ragi. Carbon Resources Conversion, 5. pp. 200-210. ISSN 2588-9133

	Text Comparative study on passive aerated in-vessel composting of food wastes with the addition of Sabah ragi.pdf Restricted to Registered users only Download (1MB) | Request a copy
	Text Comparative study on passive aerated in-vessel composting of food wastes with the addition of Sabah ragi _ABSTRACT.pdf Download (85kB)

Abstract

The aims of this study are to determine the effect of Sabah ragi on food waste and dry leaves composting as well as to compare the composting performance from a previous study that had no addition of Sabah ragi. The composting process was conducted using an in-vessel passive aerated bioreactor with turning every 3 days for 40 days. Based on the physiochemical analysis, the stability and maturity of the compost were evaluated. Parameters such as temperature, total organic carbon, moisture content, pH, conductivity, and C/N were monitored. During the composting process, the highest temperature of 54.2 °C and the highest heat generation rate per initial mass of compost dry matter of 4098 kJ kg−1 day−1 was achieved on day 7. Furthermore, when compared to previous studies, this study achieved a faster thermophilic phase (≥45 °C), a longer thermophilic period (4 days), and a higher cumulative temperature. Elementary kinetic analysis was performed based on the TOC profile and evaluated using coefficient correlation (R2). In this study, application of the second-order model resulted in good responses. Low pathogen levels and higher nitrogen content were detected in the final compost, while some of the nutrients were not in the recommended range. An estimated ragi cost of RM 1.22 was required for every 1 kg of compost with a selling price of RM 6.00/kg of compost.

Item Type:	Article
Keyword:	Composting , Ragi , Passive aeration , Soil conditioner , In-vessel
Subjects:	T Technology > TP Chemical technology > TP1-1185 Chemical technology
Department:	FACULTY > Faculty of Engineering
Depositing User:	SAFRUDIN BIN DARUN -
Date Deposited:	24 Aug 2022 14:47
Last Modified:	24 Aug 2022 14:47
URI:	https://eprints.ums.edu.my/id/eprint/33919

Actions (login required)

View Item