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Fuel polishing
Fuel polishing is the technical cleaning process used to remove or filter microbial contamination from oil and hydrocarbon fuel in storage. It is essentially the removal of water, sediment and microbial contamination from such fuels as diesel, red diesel and biodiesel. This fuel contamination, also known as 'fuel bugs' or 'diesel bugs' build up over time in stored fuels if they aren't tested and treated on a regular basis.
==Sources of contamination==
Over any given period of time fuels in storage can develop pools of sludge, sediment and water caused by microbial contamination. This contamination can quite easily find its way into fuel at one of the many exchange points in its journey from source to end user. Left untreated, the levels of contamination worsen to the point where damage to machinery, pumps and engines is likely. When fuel is pumped into a tank condensation, atmospheric absorption, and a faulty tank are usually the main causes of fuel contamination. Microbes find their way into fuel and cause problems as they multiply and grow.
In April 2010, Cathay_Pacific_Flight_780, an aircraft carrying over 300 passengers, had a close call when fuel contaminated with spherical particles damaged the aircraft's engines, resulting in 57 passenger injuries as the pilots had to land the aircraft at twice the normal landing speed.〔Cathay Pacific Flight 780〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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