october
9
an official journal of:
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published by:
Editor in Chief: RAFFAELLO COSSU
EVALUATION OF NEW SMALL-SCALE COMPOSTING PRACTICES WITH ENERGY RECOVERY
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- Available online in Detritus - Volume 10 - June 2020
- Pages 3-10
Released under CC BY-NC-ND
Copyright: © 2019 CISA Publisher
Abstract
This study involves the evaluation of new composting systems for the treatment of organic solid waste that has low environmental impact. Two composting devices were developed, with four types of management. Their behavior was analyzed regarding temperature, gas production, moisture, leachate and percolated water production, compost maturation, nutrient presence, pH and water heating, which can be seen as an energy gain in addition to the economic viability of the process. The proposed composting techniques kept the waste at thermophilic temperatures for more than 20 days, with no significant emission of CH4, under aerobic conditions by passive aeration, without leachate generation. These results can be partially attributed to the suspension of the compost on pallets, the residue composition chosen in the experiments and the boundary conditions of the compartments. The energy recovery test, through water recirculation inside the compost, presented temperatures that reached 51°C after 24 h of recirculation, and were maintained throughout the process, 20 days, demonstrating its effectiveness. The proposed models are environmentally viable, minimizing gas emissions and leachate generation compared to landfill or industrial composting plants. They can be used in industrial kitchens, residential complexes, shopping malls and other small and medium solid waste generators. In addition, the solution presented in this study avoids the transportation of waste over medium and long distances, which also brings a significant reduction in energy expenses, and in the case of landfills, it avoids occupation for long periods, thus reducing emissions of gases and leachate, whose control and treatment are expensive.Keywords
Editorial History
- Received: 06 Jun 2019
- Revised: 13 Feb 2020
- Accepted: 17 Feb 2020
- Available online: 05 Mar 2020
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