The key pollution indicators are ammonia nitrogen and BOD.

主要污染指标是氨氮和生化需氧量.

After analyzing the characteristics of ammonia nitrogen pollution in Huaiyin section of Salt river, the sources of ammonia nitrogen are investigated.

在分析盐河淮阴段氨氮污染的特征后，对氨氮的来源进行了研究。

Objective: An improved method of ammonia nitrogen in drinking water was developed for the ammonia in workplace air.

目的：建立与生活饮用水氨氮测定相匹配的方法来检测工作场所中空气氨。

This avoid ammonia nitrogen loss in the measurement and distillation steps.

避免了称量时易造成的样品损失及蒸馏过程的氨氮损失.

Near infrared reflectance spectroscopy is being available for testing total nitrogen, ammonia nitrogen, nitrate nitrogen and moisture with high precision.

因此，可以用比重计法、电导仪法以及近红外光谱法快速预测畜禽粪便中的肥料成分含量。

So the problem of unfavorable effect of ammonia nitrogen in wastewater reuse has been solved.

利用循环冷却水系统不需增加费用就可以脱除污水中氨氮,从而消除了污水回用中氨氮的影响.

The effect of the concentrations of ammonia nitrogen and nitrate nitrogen as well as pH value on the growth of Spriodela polyrrhiza was studied.

以紫背浮萍为对象，研究了氨氮、硝酸氮浓度和pH值等对其生长的影响。

It shows, of ammonia nitrogen determination method is improved, prove the improved method is feasible.

从中可以看出，对氨氮的测定方法作了改进，证明改进后的方法是可行的。

Then, the effects of ammonia-nitrogen removal rate, particle type, particle diameter and component are analyzed.

从而得出结论：投加晶种可明显提高氨氮的去除率，但对形成大粒径晶体的影响不大。

The pitting corrosion potential of 316 stainless steel increases along with the ammonia nitrogen density decrease.

在模拟中水中,随着氨氮浓度的增加,316不锈钢的孔蚀电位减小.