各类石油化工，钢铁冶金工厂排放的废水中也含有大量硫酸根离子。
The waste water released by various types of petrochemicals, iron and steel metallurgy plant also contains a lot of sulfate ion.
我们可以告诉工厂，他们不被允许将排放废水的湖泊和河流中。
We can tell factories that they are not allowed to pour waste water into the lakes and rivers.
此外，随着工厂的生产扩建，未来的废水量大概会增长75%左右，因此需要在排放前处理到3级排放标准。
In addition, with the production site planned expansion, the future wastewater flow rate is predicted to increase by approx. 75 % which will need to be treated to class 3 standards before discharge.
工厂化水产养殖废水的排放污染问题已受到人们的普遍重视。
The discharge of wastewater in industrial aquaculture has aroused the global attentions.
如一个金属零件加工厂，其金属件的电镀工艺委托外部的组织进行，那么组织应识别电镀外包方废水排放、废电镀液等；
As part of a metal processing plant, the pieces of metal plating technology by external organizations, the organization shall identify plating subcontractor wastewater, waste electroplating liquid;
我们应该控制由工厂排放的废物，并且形成新的更节省的使用淡水和废水再循环的方法。
We shall on one hand control the rubbish which has been proceeded by factory, and on other hand construct a new method of using fresh water savely and recycle the waste water.
我们应该控制由工厂排放的废物，并且形成新的更节省的使用淡水和废水再循环的方法。
We shall on one hand control the rubbish which has been proceeded by factory, and on other hand construct a new method of using fresh water savely and recycle the waste water.
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