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

作　　者：Mohd Al Mussa Ugak Abu Zahrim Yaser Junidah Lamaming Ernest Kelly Subin Mariani Rajin Sariah Saalah Farrah Wong Hock Tze Sariah Abang 

机构地区：[1]Faculty of Engineering,Universiti Malaysia Sabah,Jalan UMS,88400 Kota Kinabalu,Sabah,Malaysia [2]SMK Tamparuli,WDT 70,89259 Tamparuli,Sabah,Malaysia

出　　处：《Carbon Resources Conversion》2022年第3期200-210,共11页碳资源转化（英文）

基　　金：The authors acknowledge University Malaysia Sabah for the financial aid(SDG03-2020);Dana Inovasi Sekolah(DIS0005-2020);postdoctoral awarded to Dr.Junidah Lamaming.

摘　　要：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℃ 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℃),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(R^(2)).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.

关 键 词：COMPOSTING Ragi Passive aeration Soil conditioner In-vessel 

分 类 号：X799.3[环境科学与工程—环境工程]