2011 WASTEWATER TREATMENT & REUSE Introduction to microbial metabolism CONTENTS Carbon and energy sources for microbial growth Nutrient and growth factor requirements IS IT IMPORTANT?. B
Trang 1SPECIALIZED ENGLISH – SEMESTER 5
DEPARTMENT OF ENVIRONMENTAL TECHNOLOGY AND
MANAGEMENT
Chapter 23 FUNDAMENTALS OF BIOLOGICAL
Dr Tran Thi My Dieu
Sep 2011
WASTEWATER TREATMENT & REUSE
Introduction to microbial metabolism
CONTENTS
Carbon and energy sources for microbial growth
Nutrient and growth factor requirements
IS IT IMPORTANT?
Basic to design or to select type of
biological process is understanding of
the biochemical activities
Different microorganism use a wide
range of electron acceptors
CARBON AND ENERGY SOURCES FOR
MICROBIAL GROWTH
To continue to reproduce and function
properly
Energy and carbon
Inorganic elements
Substrates
nutrients and trace elements Growth factor (organic nutrients)
CARBON AND ENERGY SOURCES FOR
MICROBIAL GROWTH
Synthesis Nutrients
New cells
Organic
Energy
O 2
New cells
CO 2 + H 2 O
Bacteria metabolism: aerobic, heterotrophic
CARBON AND ENERGY SOURCES FOR
MICROBIAL GROWTH
Synthesis Nutrients
Bacteria metabolism: anaerobic, heterotrophic
Organic compounds
Synthesis Bacteria Energy
New cells
CH 4 & CO 2
Trang 2CARBON AND ENERGY SOURCES FOR
MICROBIAL GROWTH
Nutrients
New cells
Bacteria metabolism: aerobic, autotrophic
2
Bacteria Energy
O 2
New cells
NO 2 or NO 3
NH 4 +
CARBON AND ENERGY SOURCES FOR
MICROBIAL GROWTH
Carbon sources?
Organic matter Carbon dioxide
Organisms use organic carbon for the formation of new
Organisms derive cell
autotrophs
CARBON AND ENERGY SOURCES FOR
MICROBIAL GROWTH
Energy sources?
Supplied by light By a chemical
oxidation reaction
Organisms use light as
an energy source =
phototrophs
Organisms derive their energy from chemical reactions = chemotrophs
CARBON AND ENERGY SOURCES FOR
MICROBIAL GROWTH
Energy sources?
Heterotrophic
Phototrophic organisms
reducing bacteria) Autotrophic (alage &
photosynthetic bacteria)
CARBON AND ENERGY SOURCES FOR
MICROBIAL GROWTH
Energy sources?
Heterotrophic (protozoa, fungi
Phototrophs
Chemotrophs
& most bacteria) Autotrophic (nitrifying bacteria)
CARBON AND ENERGY SOURCES FOR
MICROBIAL GROWTH
Energy sources?
Obtain energy from the oxidation of reduced inorganic
-,
Fe 2+ , S
2-Derive energy from oxidation of organic compounds
Trang 3NUTRIENT AND GROWTH FACTOR
REQUIREMENTS
The principal inorganic nutrients needed?
N S P K Mg Ca Fe Na and Cl
N, S, P, K, Mg, Ca, Fe, Na and Cl
Minor nutrients of importance?
Zn, Mn, Mo, Se, Co, Cu and Ni
NUTRIENT AND GROWTH FACTOR
REQUIREMENTS
Growth factors
(1) Amino acid
(1) Amino acid
(2) Nitrogen bases
(3) Vitamins