整治污染问题的方法有两种。第一种是通过废物处理减少污染的危害,包括固体废物排放? 之前?的处理和液体废物或污水的处理,从而实现水的循环利用或者尽量降低最终排放前的污染程度。
A second approach is to develop an economic use for all or a part of the wastes. Farm manure is spread in fields as a nutrient or organic supplement. Effluents from sewage disposal plants are used in some areas both for irrigation and for the nutrients contained. Effluents from other processing plants may also be used as a supplemental source of water. Many industries, such as meat and poultry processing plants, are currently converting former waste products into marketable byproducts. Other industries are exploring potential economic uses
第二种方法是开发全部或部分废物的经济利用。农田中施用农家肥 补充肥分或有机肥。有些地区使用污水处理厂排放的污水进行灌溉施肥。其他水处理厂排出的废水也可用作补充水源。现在,禽肉加工等许 多行业正在把原先废弃的下脚料加工成可供出售的副产品,其他行业也在研究废弃物的经济利用可能途径。
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