Microbial characterization during composting of biowaste |
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| Authors: | Christina Chroni Adamantini Kyriacou Irene Georgaki Thrassyvoulos Manios Maria Kotsou Katia Lasaridi |
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| Institution: | 1. Department of Geography, Harokopio University, 70 El. Venizelou, 176 71 Athens, Greece;2. Department of Nutrition and Dietetics, Harokopio University, 70 El. Venizelou, 176 71 Athens, Greece;3. School of Agricultural Technology, Technological Educational Institute of Crete, Estavromenos, Herakleio, Crete, Greece;1. Aristotle University of Thessaloniki, Greece;2. University of Thessaly, Greece;3. National Technical University of Athens, Greece;1. Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou 510650, China;2. Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China;1. Innovation Base of Groundwater and Environmental Systems Engineering, Chinese Research Academy of Environmental Science, Beijing 100012, China;2. Lan Zhou Jiao Tong University, Lanzhou 730070, China;3. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;4. Energy Saving & Environmental Protection & Occupational Safety and Health Research, China Academy of Railway Sciences, 100081, China;1. Centre for Environmental Science and Engineering (CESE), Indian Institute of Technology (IIT) Bombay, Powai, Mumbai 400076, India;2. National Environmental Engineering Research Institute (NEERI), Nagpur 440020, India;1. College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China;2. Bangor University, Deiniol Rd., Bangor, UK;3. School of Civil, Mining and Environmental Engineering, University of Wollongong, NSW 2522, Australia;4. Beijing VOTO Biotech Co., Ltd., Beijing 100193, China;1. Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, Nanjing Agricultural University, Nanjing 210095, Jiangsu, PR China;2. College of Integrative Sciences and Arts, Center for Fundamental and Applied Microbiomics, The Biodesign Institute, Arizona State University, Mesa, AZ, USA |
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| Abstract: | Windrow composting of source-separated biowaste was studied in a pilot plant in Crete, with regard to abiotic factors, gas concentration in the pile and succession of functional microbial groups. The pH, C/N ratio and VS content, as well as the O2 and CO2 concentration, correlated well with composting time, indicating typical composting behaviour. Most of the microbial groups examined exhibited their highest counts towards the end of the thermophilic phase, with declining trends thereafter. The population of total mesophilic and thermophilic bacteria increased during the mild thermophilic phase and followed the temperature decline thereafter. Results on these microbial groups and fungi indicate that the timing of the thermophilic stage in the composting process, in addition to the peak temperature and duration of the stage, affects the microbial succession. Escherichia coli were detected for over 2 months of processing, in spite of the high temperatures achieved; only after about 3 months of composting did its population decline below the detection limit. |
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