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LCA comparison of windrow composting of yard wastes with use as alternative daily cover (ADC)
Authors:Rob van Haaren  Nickolas J Themelis  Morton Barlaz
Institution:1. Dept. of Earth and Environmental Engineering, Columbia University, 500 West 120th Street, Room 918, New York, NY 10027, USA;2. Earth Engineering Center, Columbia University, 500 West 120th Street, Room 918, New York, NY 10027, USA;3. Dept. of Civil, Construction, & Environmental Engineering, North Carolina State University, Box 7908, Raleigh, NC 27695-7908, USA;1. University of Cordoba (Spain) – Department of Inorganic Chemistry and Chemical Engineering, Campus Universitario de Rabanales, Carretera N-IV, km 396, Edificio Marie Curie, 14071 Córdoba, Spain;2. Institute of Water Research, Department of Microbiology, University of Granada, C/ Ramón Cajal nº 4, 18071 Granada, Spain;1. NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower, #15-02, Singapore 138602, Singapore;2. Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore;3. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;1. Faculty of Science and Technology, University of Macau, Macau, China;2. School of Environment, Tsinghua University, Beijing 100084, China;1. Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616, USA;2. Division of Agriculture and Natural Resources, University of California Co-operative Extension, Davis, CA 95616, USA;3. Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616, USA;4. AgSeal LLC, Harrison, AR, USA;1. Faculty of Science, Polytechnic School of Chimborazo, EC060155-Riobamba (Chimborazo), Ecuador;2. Department of Agrochemistry and Environment, Miguel Hernandez University, EPS-Orihuela, Ctra Beniel km. 3.2, 03312-Orihuela (Alicante), Spain
Abstract:This study compared the environmental impacts of composting yard wastes in windrows with using them in place of soil as alternative daily cover (ADC) in landfills. The Life Cycle Assessment was made using the SimaPro LCA software and showed that the ADC scenario is more beneficial for the environment than windrow composting. ADC use is also a less costly means of disposal of yard wastes. This finding applies only in cases where there are sanitary landfills in the area that are equipped with gas collection systems and can use yard wastes as alternative daily cover. Otherwise, the environmentally preferable method for disposal of source-separated yard wastes is composting rather than landfilling.
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