The term of validity of sodium coboltinitrite can be prolonged by the improved preparative methods.
改进的亚硝酸钴钠沉淀液的配制法能显著延长该试剂的使用寿命，按照文中的理论计算结果，可有效地再生和回收该试剂。
It was proved that the denitrification process of N-rich MG wastewater treatment using two-stage SBR was composed by a carbon oxygenation process and three stages nitrosation/denitrosation process.
用两段SBR法处理经稀释的味精废水的过程可分为碳氧化阶段和三个亚硝化/反亚硝化阶段。