Fuel Biocide Treatment - Hydra Fuel Additives


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Fuel additives and fuel biocide treatment at best price to protect microbial contamination in fuel systems, diesel engines, petrol engines and bunkers. Click on the link below for more info: http://hydra-fueladditives.com/


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Contamination Microbial Development Consequences http://hydra-fueladditives.com supporthydra-int.com HYDRA FUELPLUS BIOCIDE

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Microbial contamination is very likely to occur whenever there is fuel and water present in a fuel storage system. Microbial contamination can occur to any type of fuels namely - gasoline diesel home heating marine and aviation fuels. Furthermore which single specific organism causes this spoilage or fuel degradation cannot be identified. Even in a well maintained storage system the water bottom is almost invariably present. This may result from a number of sources some common examples are given below. Some percentage of water is always present even in freshly refined fuel this separates and settles down as fuel cools down. Water in the form of rain snow can easily enter the fuel storage system through sampling ports breather vents and ill-fitting seals present on floating roofs. The air present in the storage tank contains humidity which also condenses out and adds to the water present at the bottom. Biofuel are hygroscopic. So increasing the percentage of biofuel now 7 added to diesel also increases the chance of water bottom formation. HOW MICROBIAL GROWTH DEVELOPS In addition water can accumulate also during transport of the fuel and while storing in tankers or barges. Moreover certain end use applications - notably marine fuel are very susceptible to water entering the storage system. 2/5 http://hydra-fueladditives.com supporthydra-int.com

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The water bottom is formed from the accumulation of water from all these sources. Microorganisms are present in both air and water. Microbial population begins to build up at the fuel-water interface. These microorganism survive in the water phase while feeding on the hydrocarbons present in the fuel. Thus this water-fuel interface provides a suitable breeding environment for the microorganisms. As a result the population of the microorganisms explodes in a short period of time. Initially only aerobic organism are predominantly present they use the oxygen dissolved in water for respiration. But as the oxygen begins to deplete more anaerobic organisms begin to thrive. These organisms are sulphate reducing bacteria which do not require oxygen for respiration. They produce hydrogen sulphide as a by-product which leads to corrosion of the storage system. MICROBE SPECIES COMMONLY FOUND IN FUEL Bacteria: Fungi:  Clostridium sp.  Desulfotomaculum sp.  Desulfovibrio sp.  Flavobacterium sp.  Hydrogenomonas sp.  Pseudomonas aeruginosa  Pseudomonas sp.  Sarcina sp.  Aspergillus sp.  Candida sp.  Fusarium sp.  Hormocoins resinae  Yarrowia tropicalis 3/5 http://hydra-fueladditives.com supporthydra-int.com

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Sulphate reducing bacteria are anaerobic in nature i.e. they don ’t require oxygen for respiration. These bacteria reduces sulphate to hydrogen sulphide. Hydrogen sulphide is highly corrosive. When it enters the fuel system it causes severe pitting of the fuel tanks the connecting pipes and engine wear. Oxidation of fuel which takes place due to the presence of moisture in the fuel system leads to formation of inorganic particles. This inorganic particles causes stability problems and filter and pipes clogging. CONSEQUENCES OF MICROBIAL GROWTH CONTAMINATION OF FUELS Direct Effects of Microbial Metabolic Attack on Fuels Fuel Haziness: Haziness of the fuel is a clear cut indication that the fuel is out of specification. The increase in water content is the basic reason behind the fuel haziness which results due to the production of bio-surfactants. They are the by-products of microbial growth and they affects the surface tension at the fuel-water interface and thus increases the solubility of water in the fuel. Sulphate Reduction and Sulphide Production: Sulphate reducing bacteria are anaerobic in nature i.e. they don ’t require oxygen for respiration. They are the oldest form of micro-organisms which can be traced back to 3.5 billion years ago. They actively participate in the sulphur cycle and converts sulphate to hydrogen sulphide. It produces odour similar to rotten egg. Hydrogen sulphide can evolve in storage tanks bunkers and barges and leads to corrosion of the fuel storage systems. Biomass Production and Biofilm Formation: When water bottom is present in a storage system in hot and humid environment microbes tend to thrive. 100ppm 0.0001 of water is sufficient for bacteria to grow in the fuel system. These microbial problems increases staggeringly when the microbes start to reproduce and form biofilms. Sludge are formed as a result of microbial debris which are deposited on the bottom of the storage tank. Sludge serves as a reservoir of microbial infection which will contaminate the fuel every time the tank is used. So it should be removed as soon as possible. These sludge also provide a suitable environment for the microbes to cause tank corrosion. Indirect Effects of Microbial Contamination of Diesel Fuels Sludge Formation: Microbial Influenced Corrosion Organic Acid Accumulation: Transfer-line Flow Restrictions: Filter Plugging: Biopolymers are formed as a result of microbial growth. Biopolymers along with other microbial debris stick to the filter and pipes causing severe blockage and reduce in flow rates. They can cause serious problems like engine failure or stalling at end user level. 4/5 http://hydra-fueladditives.com supporthydra-int.com

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The fuel quality degrades and the cetane number falls down rapidly when microbial contamination is established. Additive rich in nitrogen and phosphorous can boost microbial growth. In the process degradation of fuel additives takes place and their effect reduces. A wide range of fuel types are susceptible to microbial contamination where some of the fuels are more susceptible than the others. Recent study has shown that straight chain paraffins gets easily contaminate and degrade soon while aromatic and olefins are found to be less susceptible. Another factor that greatly influence microbial contamination is the duration and condition of storage. Poorly maintained fuel and fuel in storage for a long duration are likely to develop contamination But the major cause of fuel contamination is the presence of water bottom in the storage tank. Unless this water is removed or treated with a proper biocide it is very likely that contamination will develop in the future. Hydra-FuelAdditives Hydra International Ltd. Cerberian House Carters Lane Kiln Farm Milton Keynes MK11 3ER UK. Tel: +44 1908-265889 Fax: +44 1908-262097 Email: supporthydra-int.com Reduced Heat of Combustion: Degradation of Additives: Odour: Microbial contaminated fuel produces a foul odour due to the presence of sulphate reducing bacteria that produces hydrogen sulphide. Hydrogen sulphide has a rotten egg smell. OTHER FACTORS INFLUENCING MICROBIAL CONTAMINATION 5/5 http://hydra-fueladditives.com supporthydra-int.com

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