所有这些步骤，包括那个有技术含量的从纤维素中提取糖类，都已经可以实现，但成本较高还不能实现工业化。

All these steps, including the tricky one of recovering sugar from cellulose, can be done already, but not cheaply enough to produce tens of billions of gallons a year.

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我们还整合了多种纤维素酶，这些酶可以把复杂的糖类转化成简单的糖类，并在同个细胞中进行发酵，制造出酒精。

We're also combining cellulases, the enzymes that break down complex sugars into simple sugars and fermentation in the same cell for producing ethanol.

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红薯淀粉生产废水是高浓度有机废水，废水中主要含有糖类、蛋白质、纤维素、脂肪等污染物。

Sweet potato starch industry brings high concentration organic wastewater, it mainly contain sugar, protein, cellulose and fat etc.

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