Recovery of sodium compounds is important in the economy of the process. In modern kraft mills, operations are completely contained; waste streams are recycled and reused, eliminating water pollution.

钠化合物的回收在这种方法的经济效益中起重要作用。在近代的硫酸盐制浆厂中，操作过程是全封闭的；废液经回收处理后重复使用，消除了对水的污染。

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Mineral compounds are made of elements such as sulphur, phosphorus, iron, potassium, sodium, and calcium.

无机化合物是由诸如硫、磷、铁、钾、钠和钙等元素组成。

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The compounds, which include ammonia, carbon dioxide, carbon monoxide, sodium and, surprisingly, silver, could have come from the Earth, from the moon's interior, or from comets and asteroids.

这些物质,包括氨、二氧化碳、一氧化碳、钠时,让人吃惊的是,银,可能来自地球、月亮的内部,还是来自彗星和小行星。

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The remainder will end up in salt ponds where various compounds -- sodium chloride, gypsum, calcium carbonate -- can be extracted and potentially commercialized.

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