These present aesthetic problems even though they may not be particularly deleterious for most water USES.
这是目前的审美问题，尽管他们可能不用水，特别是有害的大部分。
2
The treatment of deleterious heterocyclic compounds in industrial waste water is an important field.
工业废水中有毒杂环化合物的处理是一个具有重大实用价值的研究课题。
3
Slaughter waste water includes a lot of nitrogenous organic matter such as blood, pluck, hairs and soon, and it is easy to breeding large Numbers of deleterious microorganism.