Biodegradable and Nonbiodegradable elements(waste)
1. Topic: Biodegradable and
Nonbiodegradable elements( waste)
GROUP 6 MEMBERS:
Garhan R.G Bestman 10444
Sheku- bah. M Massaquoi 10438
Bernice K.Nyepan 10557
Arnold T. Flahn 10432
Giftee J. Roumi 10453
February 15, 2023
2. Objectives
Upon completion
• we expect out listeners to have basic understanding in
biodegradable. and nonbiodegradable terminologies.
• Be able to distinguish the two
• know what waste are and basic types
• Know how waste can be managed
• Know basic treatment methods of waste
• Know Waste disposal strategies
6. Biodegradable Elements
• What is Biodegradation
The natural breakdown of
materials by microbes
The natural decomposotion of
organic by microbes
The whole process of
biodegradation is NATURAL
7. Mechanisms/ Stages of biodegradation
Biodegradation
comprises of ;
Aerobic process
Anaerobic process
1. Aerobic process is the microbial breakdown of
material in presence of Oxygen
It is consist of a set of stages;
Biodeterioration- marks by surface level
deterriotion. eg: biofilm formation
Biofragmentation- disintegration of larger molecules
by microbes
Assimiliation- uptake of organic matters by
microbes. eg: nutrients
Mineralization- transformation of organic matter
into inorganic matter
8. Mechanisms/ Stages of biodegradation
2. Anaerobic Biodegradation- Degradation of organic matter without oxgen
-contains three stages;
Non-Methanogenic Biodegradation- degration of organic matter with out
the production of biogas, but CO2.
Methanogenic, Unsteady Biodegradation- the phase of biodegradation
in which acetic acid is produced.
Methanogenic, Steady Biodegradation- the final stage of biodegradation,
in which methane is produced.
12. Treatment or Management of
Hazardous Waste
1. Produce less of it
2.Biological treatment eg: Geobacter
3.Chemical treatment
4.Physical treatment
13. Disposal of Hazardous Waste
The options for disposal include land disposal
underground disposal and deep well injection.
The choice of disposal method should be based
on evaluationof economics and potential
pollution risks.
To prevent enviromental pollution from
landfills.
14. Remedial Action
Temporary removal of the hazardous waste
Construction of a secure landfill on the same site
Proper replacement of the waste.
It may include:
