this biodegradation process will help us for get useful compounds from waste Rubber products .

1. ECOTOXICAL
ASSESSMENT
BIODEGRADATION
GUIDED BY :- PROF.
BHAKTI PATEL

2. Team Members :-
• Meet Zadafiya 190280126039
• Jenish Savaliya 190280126029
• Pratik Talaviya 190280126034

3. INDEX
 Introduction
 End of Life Scenarios of Biodegradable Polymers
 Biodegradation during Organic Recycling
 Biodegradation in Soil
 Investigation into Polymer Biodegradation
 Ecotoxicological Assessment of Biodegradation Intermediates

4. What effect of biodegradable product on
Environment
 Biodegradable wastes pollute the
environment only when they are in
abundance in the environment.
 Through the following ways they can affect
the environment: They produce a huge
quantity of microbial flora around the
wastes.
 These microbes can generate several
communicable diseases in humans, animals,
and plants.

5. End of Life Scenarios of Biodegradable
Polymers
 Under Aerobic Conditions
Cpolymer + O2 → CO2 + H2O + Cresidue + Cbiomass
 Synthesis of Glucose
6 CO2 + 6 H2O → C6H12O6 + 6 O2
 Under Anaerobic Conditions
CnH2nOn + CnH2nOn → nCH4 + nCO2
With out
Oxygen
With
oxygen

6. 2.Home Composting
3.Anaerobic Digestion
1.Industrial Composting
• During the active composting period, the temperature
stays in the range of 120-170 F (49-77 C)
• moisture levels are kept between 40% to 60% to support
the growth of naturally occurring micro-organisms that break
down the waste.

7. Biodegradation in Soil
• 1 Soil Texture and Structure
• 2 Water Content
• 3 Organic Matter
• 4 PH
• 5 Temperature
• 6 Oxygen
• 7 Sunlight

8. Investigation into Polymer Biodegradation
• 1 Standard on Industrial Composting :
• the composting process and the absence
of ecotoxic effects of the compost
obtained from a feedstock that includes
the plastic .
• Regarding biodegradation, a 90%
mineralisation level, measured as
produced CO2 or consumed O2, within 6
months under controlled composting
conditions is required .
• requires the absence of specific classes of
chemicals in the polymeric composition,
i.e., polycyclic aromatic hydrocarbons
and other persistent pollutants.
• 2 Identification of the Intermediates of Polymer
Biodegradation :-
• Biodegradable polymers are placed in soil or
composting plants as solid materials.
• As such they are not available to microbial intracellular
enzymes that mineralise organic molecules into
inorganic compounds.
• The surface of the item is the interface between the
plastic solid phase and the aqueous liquid phase, where
microorganisms are present.
• In order to uptake large organic molecules from the
outside, microorganisms need to reduce the polymer’s
molecular length.
Investigation into Polymer
Biodegradation

9. Ecotoxicological Assessment
of Biodegradation
Intermediates
Aquatic Toxicity
 Bacteria
 Algae
 Crustacea
 Fish

10. Terrestrial Toxicity
• 1 Bacteria
transformation processes over a period of no less than 28 days
• 2 Invertebrates
the number of offspring present in soil after a further 4 weeks
• 3 Plants
growth during a period of 14−21 days, which starts when 50% of
the seeds in the control group have emerged.
• 4 Vertebrates
Terrestrial vertebrates usually investigated during toxicity
experiments are mammals, less notably birds.