Describe Biodegradation
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Describe
BIODEGRADATION
b.stev
these microbes grow in
10-35oC + H2O +decaying organic matter
the process gives off :
heat + gases
(Wikipedia, 2008)
(Wikipedia, 2008)
(Wikipedia, 2008)
How long do some common things take to
degrade?
Tetrapaks 1-5
yrs
75 days for a
Biodegradable
Plastic Bag OR
Paper & Styrofoam
Cups
Plastic Bags 10/20yrs
Orange Peels 1 month
Cotton rags 1-5 mth
Paper 2-5 mth
(Wikipedia, 2008)
XENOBIOTIC COMPOUNDSCOMPOUNDS
Industry releases many chemicals,
these are often utilised by microbes
dioxins from chlorine bleaching
human hormones near sewage pipes
(Wikipedia, 2008)
Chlorobenzenes
2,4dichlorophenoxyacetic
acid
Nitroaromatic compounds
Chloroalkanes
Herbicide
Atrazene
can ALL sustain microbial processes
MODIFICATION: the chemical is altered for processes CONJUGATION: use is made of any genetic material
EXCRETION: disposing of unwanted material
a 3 phase process
Bibliography
Pollution Issues. (2007). Biodegradation. Retrieved September 8, 2008, from http//: www.pollutionissues.com/A- Bo/Biodegradation.html
Wikipedia. (2008). Biodegradation – wikipedia , the free encyclopedia. Retrieved September 8, 2008, from http//:www.en.wikipedia. org/wiki/Biodegradable
Www.molecular-plant-biotechnology.info. (2008). Types of recalcitrant xenobiotic compounds, halocarbons, synthetic. Retrieved September 9, 2008, from http:// www.molecular-plant-biotechnology.info/ environmental-biotechnology/microrganisms-involved-in-aerobic-d igestion.htm
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