（水资源很少被浪费。） 使用过的水经过处理后通常若不是被安全地排放掉，就是（使用过的水经过安全处理后，通常会）重新应用于工业生产或空气调节，或者和水库中的水进行混合，成为饮用水。
Used water is treated and then either safely disposed of, reused for industrial purposes or air-conditioning, or mixed with reservoir water for drinking.
着重阐述了二步石灰法处理酿造用水的原理，试验方法及生产实践。
The principle, testing method and the production practice of treating the brewing water with two-step lime method was expounded.
用水吸收淀粉法生产草酸的尾气并副产硝酸的尾气处理工程，其设计方法目前尚无资料介绍。
Until now there has not appeared the design on tail gas treatment engineering of producing oxalic acid and by-producing nitric acid from starch.
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