Wastewater treatment systems harbor specific and diverse yeast communities |
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| Affiliation: | 1. College of Life Sciences, Henan Normal University, Xinxiang, 453007, China;2. Advanced Water Management Centre, University of Queensland, QLD 4072, Australia;1. School of Food Science and Engineering, South China University of Technology, Wushan Rd. 381, Guangzhou 510641, PR China;2. Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China;3. School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore;4. Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), Guangzhou 510640, PR China;1. Institute of Sanitary Engineering and Waste Management, Leibniz University Hannover, Welfengarten 1, D-30167 Hannover, Germany;2. Agricultural & Food Engineering Department, B-166, Indian Institute of Technology, Kharagpur 721302, India;1. Department of Pathology and Legal Medicine, Faculty of Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Ceará, Brazil;2. School of Veterinary Medicine, Postgraduate Program in Veterinary Sciences, State University of Ceará, Fortaleza, Ceará, Brazil;3. School of Medicine, Christus College – UNICHRISTUS, Fortaleza, Ceará, Brazil;4. Department of Statistics and Applied Mathematics, Federal University of Ceará, Fortaleza, CE, Brazil;1. State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China;2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China;3. Innovation Base of Ground Water & Environmental System Engineering, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China;4. School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China |
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| Abstract: | Yeasts, as a group of single-celled fungi, are widely distributed in nature and play important roles in biotechnological applications. However, how the types of wastewater and the treatment processes influence yeast populations is not clear. In this study, both cultivation and culture-independent methods were used to investigate the distribution and diversity of yeasts in three typical full-scale plants processing biopharmaceutical, papermaking and municipal wastewater. Cultivable yeasts were very abundant ranging from 102 to 105 cfu g−1 sludge, and highly diverse with 48 taxons belonging to 21 different genera, thus exceeding the yeast richness reported for marine and sugar-rich soil habitats. Genera Rhodotorula, Candida, Trichosporon, Pichia and some unidentified Ascomycetes were the most frequent populations cultivated. However, the compositions of yeast community structures in the plants were dissimilar and were shaped primarily by the type of wastewater treated but also by processing conditions. Culturing yeasts is a powerful way to complement culture-independent approaches to study their diversity, since significant more yeast species, especially quite a few possible novel species were recorded and isolated by cultivation method. |
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