Feasibility study of pilot scale vegetable waste composting project for Kundasang community’s waste management program

• Published in: International journal of recycling of organic waste in agriculture Vol. 13; no. 3; pp. 1 - 12
• Main Authors: Murshid, Noorafizah, Yaser, Abu Zahrim, Lamaming, Junidah, Mariani Rajin, Saalah, Sariah, Taliban, Mariana
• Format: Journal Article
• Language: English
• Published: Isfahan Islamic Azad University, Isfahan (Khorasgan) Branch 01.07.2024; Oxford International Collaboration Centre Press (OICC press)
• Subjects: Aeration; Capital costs; Circular economy; community composting; Composting; Cost benefit analysis; Dry matter; Economic analysis; Economic impact; Electrical conductivity; Electrical resistivity; Feasibility studies; Impact analysis; Moisture content; Nutrient content; Nutrient loss; Nutritive value; Organic matter; passive aerated composter; Project feasibility; Project management; sustainable development; techno-economic analysis; vegetable waste; Vegetables; Waste management; Water content
• ISSN: 2195-3228; 2251-7715
• DOI: 10.57647/j.ijrowa.2024.1303.27

Purpose: Vegetable waste (VW) composting was assessed using a passive aerated pilot-scale composter at Kundasang, Sabah. The passive aerated composting system proposed at Kundasang Community Composting Site (KCCS) was analyzed for its techno-economic impact.Method:The composting performance (temperature, organic matter loss, moisture content, pH value, electrical conductivity, and nutrient value) of 500 ± 2 kg of VW, 250 ± 2 kg of RH, and 19 ± 1 kg of CM feedstock mixture was analyzed. The benefit-to-cost ratio was used to assess the impact of the techno-economic analysis on the designed and piloted KCCS.Results: In the pilot scale composting condition, temperature reached its highest at 59 ± 7 °C (day 5) and for five consecutive days (day 2 until day 6) in the thermophilic phase. Results of the final compost (on a dry matter basis) showed that the moisture content is 62 ± 0.2% WM, the pH level is 7.6 ± 0.1, the electrical conductivity is 1.8 ± 0.4 mS/cm, and the N, P, and K values are 0.58 ± 0.10% DM, 0.04 ± 0.02% DM, and 0.17 ± 0.04% DM, respectively. The techno-economic analysis shows that with the capital cost normalized on a 20-year basis, the KCCS composter system can generate approximately MYR 25, 000 (USD 5, 600) per year in revenue.Conclusion: The results show that these composting methods are suitable for VW and Kundasang community conditions, and this study will benefit the community in dealing with VW waste and generating a circular economy while establishing a self-sustaining community.