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Bài giảng công nghệ môi trường_22

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Tham khảo bài viết 'bài giảng công nghệ môi trường_22', khoa học tự nhiên, công nghệ môi trường phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | DI I VAN LANG UNIVERSITY PARTMENT OF ENVIRONMENTAL TECHNOLOGY AND MANAGEMENT SPECIALIZED ENGLISH - SEMESTER 5 Chapter 22 FUNDAMENTALS OF BIOLOGICAL STEWATER TREATMENT REUSE Composition and classification of microorganisms Dr. Tran Thi My Dieu Sep.2011 CELL COMPOSITION Is it important to know CELL COMPOSITION What are major cellular materials provide a basis for understanding the nutrients needed for growth To support microbial growth in biological system appropriate nutrients must be available Protein 55.0 RNA 20.5 Polysaccharide 5.0 Other sugar 6.3 Lipid 9.1 amino acid DNA 3.1 Inorganic ions 1.0 VAN LANG UNIVERSITY DENTEMA CELL COMPOSITION What are major cellular materials 80 water Prokaryotes 20 dry material 90 organic 10 inorganic Is it important information VAN LANG UNIVERSITY DENTEMA 1 CELL COMPOSITION CELL COMPOSITION What is the most empirical formula for the organic fraction of cells What is the most empirical formula for the organic fraction of cells 53 C5H7O2N C C5H7O2N Approximation May vary with time and species C60H87O23N12P C60H87O23N12P Practical purpose VAN LANG UNIVERSITY DENTEMA CELL COMPOSITION CELL COMPOSITION What is the most empirical formula for the organic fraction of cells C5H7O2N N and P are macronutrients What are trace elements required Zinc manganese copper molydenum iron cobalt C60H87O23N12P CELL COMPOSITION Where can microorganisms get these elements and compounds From the environment A shortage of any of these substance would limit or alter growth DENTEMA 2 ENVIRONMENTAL FACTORS What environmental conditions are important for selection survival and growth of microorganism pH and temperature Type Temperature range oC Optimum range oC Psychrophilic 10-30 12-18 Mesophilic Thermophilic UNIVERSITY 20-50 35-75 25-40 55-65 DENT EMA ENVIRONMENTAL FACTORS pH and temperature Optimal growth for a particular microorganism occurs within a fairly narrow range of temperature and pH Temperature optimum value have a more significant effect on growth

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