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Estimation on Biodegradability of Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHB/V) and Numbers of Aerobic PHB/V Degrading Microorganisms in Different Natural Environments
- Source :
- Journal of Polymers and the Environment. 13:39-45
- Publication Year :
- 2005
- Publisher :
- Springer Science and Business Media LLC, 2005.
-
Abstract
- To assess the capacity of the natural environment for degrading PHB/V, the film-MPN method proposed previously was modified to estimate the numbers of PHB/V degrading microorganisms (degraders) in various environments. The First-Order Reaction (FOR) model was used to determine the appropriate incubation period for the method. Numbers of aerobic PHB/V degraders were estimated in garden soil, paddy field soil, farm soil, river bank soil, infertile garden soil, river water, activated sludge, and seawater by the film-MPN method. Results were compared with those estimated by the clear-zone technique and showed that the film-MPN method was suitable for estimating the numbers of PHB/V degraders in the environments tested. On the other hand, biodegradability of injection molded PHB/V samples was investigated in several kinds of environments. The changes of weight were studied and results showed that biodegradability of PHB/V related to the numbers of PHB/V degraders in similar ecosystem in different regions. In different environments the biodegradability of PHB/V not only related to the number of PHB/V degraders, but also depended on whether there were conditions for the PHB/V degraders to grow and proliferate easily in the environment.
- Subjects :
- Environmental Engineering
Materials science
Polymers and Plastics
Waste management
Microorganism
technology, industry, and agriculture
macromolecular substances
Biodegradation
complex mixtures
River water
Activated sludge
Poly(3-hydroxybutyrate)-co-(3-hydroxyvalerate)
Materials Chemistry
Paddy field
lipids (amino acids, peptides, and proteins)
Food science
Subjects
Details
- ISSN :
- 15728900 and 15662543
- Volume :
- 13
- Database :
- OpenAIRE
- Journal :
- Journal of Polymers and the Environment
- Accession number :
- edsair.doi...........e31f075d7686c301e61bb62c71957a2e