BIODETERIORATION OF RUBBER PDF

0 Comments

During the past 40 years the production of natural rubber has increased three times and of synthetic rubbers 15 times, Biodeterioration 7 pp | Cite as . Rubber wood (Hevea brasiliensis) can be used commercially for the construction of fishing boats, which are subjected to biodegradation in the water, and on. Natural rubber (NR) was once the only source of the elastomeric materials required by a wide range Biodeterioration, Elsevier Applied Science, 7 (), pp.

Author: Gromi Gogul
Country: Jordan
Language: English (Spanish)
Genre: Software
Published (Last): 11 November 2014
Pages: 300
PDF File Size: 9.64 Mb
ePub File Size: 2.73 Mb
ISBN: 803-7-90813-202-5
Downloads: 7180
Price: Free* [*Free Regsitration Required]
Uploader: Kerr

The methane produced can be used as fuel and is extracted from the top of the tank. The deterioration of rubber by various fungi and actinomycetes might cause serious electrical problems to buried cables. Xenobiotics are synthetic organic compounds and they generally have chemical properties that cannot be broken down by microbial degradative enzymes. Minimises the concentration of growth inhibitory materials.

Certain organisms produce pigment or growth of cellular fibers. Assessment of biodeterioration of rubber wood exposed to field conditions. This is based on New Zealand Qualification Authority Unit [1] entitled “Discuss microbial biodeterioration and biodegradation. Privacy policy About WikiEducator Disclaimers.

Incubation periods can take weeks or months for biodeterioratioj degradation products for further analysis [22]. Navigation menu Personal tools Log in Request account. Genitic exchange become easier due to proximity to progeny and other bacteria [6]. Increasing the binding of water molecule 3. These are huge tanks which sludge is pumped into from the settling tanks.

Gamma irradiation is a good preventive method for wood decay. Composting involves breaking down og organic materials by a large number of bacteria and fungi. It is used against specific contaminants. These websites out line the prevention methods [26] used for Stone and Wood.

Related Posts  A82C250 DATASHEET PDF

They are now also selling the methane to the nearby businesses. When fiber is continuously exposed to temperature and moisture it changes.

This causes colour and weakness in the fiber and subsequently runber quality of materials result.

Biodeterioration | definition of biodeterioration by Medical dictionary

Biodeterioration of stored diesel oil: For future work on smoke treatment for enhancing wood resistance to biodeterioration attack, wood species producing smoke via pyrolysis could be desirable for investigation because the chemical compounds of the wood species would be different from each other.

Produce useful by-products 3. Metals used in marine environments or the walls of the fuel tanks of jet aircraft are susceptible to microbial corrosion. In assimilatory biodeterioration, the organism uses biodeteriorattion as a food or energy source. Inside the tank, mixing is constantly moving the sludge around.

Microbiological Deterioration of Vulcanized Rubber

Within these tanks, anaerobic bacteria are metabolising bioxeterioration sludge and helping to break it down into alcohols, acids and gases. They use the carbohydrates, proteins and fats which they convert to organics and alcohols mostly acetic and propionic acids.

International Biodeterioration and Biodegradation Biodeterioration [25] also has a impact on a wide range of materials including Stone and Wood evaluation of biodeterioration is very important especially in situations such as construction. Bioremediation refers to any process that use microorganisms, green plants or their enzymes do to return the natural environment, which was changed by contaminants, back to its original state.

There are many reasons for microorganism having biofilms some of the advantages and disadvantages are outlined at “Bakers’ yeast Blooms into Biofilms. Minimises and prevents scum build up. Bioventing, bioreactor, composting, bioaugmentation, rhizofiltration and boistimulation are the major bioremediation techniques [30].

It is essential to bioseterioration microorganisms that take part in this process in order to properly protect objects from biodeterioration. They can also form on interfaces, i. It is full of nutrients and can be made into a supplement for livestock. Distribute the alkalinity buffer throughout the tank and helps keep the pH under control. The objectives of anaerobic digestion are 1. This historic site has suffered corrosion, despite treatment with synthetic polymers. These websites give more examples of biodegradation of natural materials: It is found in the cell wall and appears as a complex with cellulose and hemicellulose polysaccharides.

Related Posts  GABRIEL COUSENS CONSCIOUS EATING PDF

Decompose the sludge organics 2. Resistance of smoked glued laminated lumber to subterranean termite attack. Valdes, is and the different types of Bioremediation [29]. Prevention of biofilm formation and further biodeterioration on material used in space should emphasize surface engineering of materials so that initial attachment and susceptibility to microorganism can be minimized.

Bioventing is a process which provides oxygen by stimulating naturally occurring soil microorganisms to degrade components in soil. Biofilms usually have high resistance against antibiotics and disinfectants. These require oxygen and moisture to break down organic material [32].

Bioaugmentation is addition of a group of natural microbial strains or a genetically engineered variant to treat contaminated soil or water. Wood decay is mainly caused by fungus. Bioremediation is to clean up contaminated soil or water through using microorganisms. Biodeterioration of sandstone under the influence of different humidity levels in laboratory conditions.

Biofilms are the communities of micro organisms and have a self developed polymeric matrix and adherent to an inert or living surface.