To get usable oil from this mixture, producers have to separate the bitumen from the sand using hot water, and then process the bitumen into crude oil.

为了从混合物中得到油，开采者用热水把沥青跟沙子分开，再把沥青加工成原油。

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But it requires energy to separate the algae from the water and then process the oil they make internally into a usable fuel.

但是这需要能量将藻类从水中分离出来，然后加工成可用燃料。

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A vertical or horizontal metal separator that USES gravity to separate water, gas, and oil.

利用重力分离水、气和油的立式或卧式金属分离器。

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Forty-nine vessels - oil skimmers, tugboats barges and special recovery boats that separate oil from water - were meanwhile working to round up oil, BP said.

BBC: Growing concerns over Gulf of Mexico oil leak