Related Experiment Video
Updated: Aug 13, 2026
13:38
Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture
Published on: May 10, 2013
A review of plastic waste biodegradation
Ying Zheng1, Ernest K Yanful, Amarjeet S Bassi
1Department of Civil and Environmental Engineering, The University of Western Ontario, London, Ontario, Canada.
Critical Reviews in Biotechnology
|January 20, 2006
Summary
Biodegradable plastics offer solutions to plastic waste challenges. Research shows advancements in developing biodegradable materials and microbial degradation of conventional plastics, reducing environmental impact.
Area of Science:
- Environmental Science
- Materials Science
- Microbiology
Background:
- Increasing plastic use and disposal challenges necessitate biodegradable alternatives.
- Conventional plastics pose significant environmental disposal pressures.
- Biodegradation of plastic waste is crucial for environmental sustainability.
Purpose of the Study:
- To review technological advancements in biodegradable plastics.
- To explore microbial degradation of conventional plastics.
- To identify viable methods for reducing plastic waste impact.
Main Methods:
- Review of scientific literature on plastic biodegradation.
- Analysis of additives (pro-oxidants, starch) for enhancing biodegradability.
- Investigation of microbial degradation pathways for various plastic types.
Main Results:
- Thermoplastics (polyolefins) show biodegradability after photo/chemical degradation.
- Thermoset plastics (aliphatic polyester, polyester polyurethane) are susceptible to microbial attack.
- Microorganisms can utilize polyurethane as a carbon and nitrogen source.
- Aliphatic-aromatic copolyesters exhibit favorable mechanical properties and biodegradability.
Conclusions:
- Modified plastics and microbial degradation offer promising solutions.
- Targeted research can lead to effective plastic waste management strategies.
- Further development is needed to mitigate plastic pollution effectively.
Related Concept Videos
01:28Microbial Bioremediation of Plastics
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
01:27Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
01:26Microbial Bioremediation of Hydrocarbons
Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...
01:28Microbial Bioremediation of Pesticides
Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...
00:46Bioremediation
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
01:30Biological Treatment of Effluent and Waste Water
Biological wastewater treatment relies on the metabolic activity of microorganisms to remove pollutants from sewage. In modern treatment systems, this process is organized into sequential stages that progressively reduce solid material, dissolved organic matter, and microbial contamination. Each stage plays a distinct role in improving water quality and preparing the effluent for safe discharge or reuse.Primary and Secondary TreatmentPrimary treatment is a physical process that removes large...