A large quantity of waste acid is discharged from titanium dioxide production by sulfuric acid method that must be treated for preventing the environment.
硫酸法钛白生产中产生大量高浓度的废硫酸，必须治理，否则将对环境造成巨大污染。
A great quantity of acid wastewater is discharged from the production process of sulfuric acid, single superphosphate and ammonium phosphate, causing serious pollution of water bodies.
硫酸、普钙和磷铵生产过程中排放大量酸性废水，对水体造成严重污染。
The large quantity of toxic and harmful sewage with complex components and high density, which is discharged in the course of the coal gas production, is a kind of hard-treated industrial sewage.
在煤气生产过程中排出大量有毒有害污水，其水量大、成分复杂、浓度高，是一种很难处理的工业污水。
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