Objective To compare diffenrent amounts of the glycyrrhizic acid extracted by two methods-decoct method and Ammonia-water method.

目的比较水酸法和氨水法提取甘草酸含量的变化。

youdao

By using the fact of tar exiscing in surplus ammonia water the SCCP condensation system, the reason of tar existing in surplus ammonia water is analyzed, and the method removing tar is discussed.

对于焦化厂冷凝系统剩余氨水带油的问题，从理论和实践分析了带油原因，并对剩余氨水除油方法进行了探讨。

youdao

Biological pretreatment technology is an economic and efficient method to remove ammonia - nitrogen in micro - polluted raw water.

生物预处理是去除微污染源水中氨氮的一种经济有效的方法。

youdao