The collected cooking oil is refined and recycled for use as biodiesel fuel (BDF) in the very same buses, which run on 12 routes through the city.

收集上来的食用油通过提炼，最终变成生物柴油，为运营在该市12条线路上的快速公车提供燃料。

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Biodiesel fuel (BDF) has been made by transesterification of extracted oil of soybean oil sediment with methanol in the presence of KOH as catalyst.

大豆油脚浸出油与甲醇在催化剂koh作用下通过酯交换反应制得生物柴油(BDF)。

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And two days later the authorities sent the Bahrain Defense Force (BDF) into the hospital.

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Policemen and hospital staff milled around in the corridor outside his upstairs room in the well guarded and ultra modern military hospital run by the BDF, the Bahrain Defence Forces.

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