Foaming in anaerobic digesters caused by Microthrix parvicella |
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| Affiliation: | 1. Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia;2. NTT Institute of Hi-Technology, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam;3. Department of Environmental Energy Engineering, Kyonggi University, 442-760, Republic of Korea;4. Institution of Research and Development, Duy Tan University, Da Nang, Viet Nam;5. Gujarat Pollution Control Board, Gandhinagar 382010, Gujarat, India;1. Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000, Gent, Belgium;2. Innolab, Derbystraat 223, 9051, Sint-Denijs-Westrem, Belgium;3. Microbial Interactions and Processes Research Group, Department of Medical Microbiology, Helmholtz Centre for Infection Research (HZI), Braunschweig, Germany;1. Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, NSW 2007, Australia;2. Climate Change Cluster (C3), University of Technology Sydney, NSW 2007, Australia;3. Technical Services, Western Sydney University, Kingswood, NSW 2747, Australia;4. NTT Institute of Hi-Technology, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam;1. Department of Microbiology and Ryan Institute, National University of Ireland Galway, University Road, H91 TK33, Galway, Ireland;2. Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Via Claudio 21, 80125, Naples, Italy |
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| Abstract: | Three large wastewater treatment plants in the greater Stockholm area have experienced serious anaerobic digester foaming. Microscopic studies of the sludge from the foam phase showed a network of the filamentous organism Microthrix parvicella. The morphology of the long, coiled filament appeared to be affected by the anaerobic conditions where it became broken up into to shorter and thicker filaments. The operating strategy to prevent foam in the anaerobic digesters at these plants is to control the growth of M. parvicella in the activated sludge tanks by increasing the sludge load. Top installed stirrers and the addition of poly-aluminium salt have also been used to prevent foam formation. |
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