这种婚纱的成分有聚乙烯醇，是一种可生物降解的物质，可使得婚纱在水里溶解而不破坏生态环境。
The marriage gauze of components, is a kind of polyvinyl biodegradable material, which can dissolve in water gauze without damage the ecological environment.
它能从污水中去除溶解的和胶体的可生物降解有机物及能被活性污泥吸附的悬浮固体和其他一些物质。
It can remove soluble and colloidal biodegraded organic matter and suspended solid adsorbed by activated sludge from wastewater.
由于焦化废水中含有大量的难生物降解以及一些有毒还对微生物有害的物质，而且其可生化性差，因而焦化废水成为公认难处理工业废水之一。
Because coke sewage contains lots of hard-biodegraded and toxicant substances, It is considered to be one of the most difficult industrial wastewater to purify.
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