如今，船只和工厂在向海洋、河流等排放废物。

Right now, ships and factories are putting wastes into seas, rivers and so on.

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这一方法有效降低了能源成本以及对污水排放废物处理费用。

This also results in savings in energy costs as well as costs of discharge of effluent to waste treatment.

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精馏是分离过程中典型的单元操作，因其能耗大，故考虑工艺排放废物对环境产生影响的同时，必须考虑能量消耗对环境的影响。

When discussing environmental impact of refinery process, both energy and process waste should be considered, because it consumes a lot of energy.

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