水洗羽毛废水中氨氮含量的测定研究

Study on Measurement of the Content of N-NH_3 in Waste Water of Washed Feathers

采用水杨酸分光光度法测定水洗羽毛废水中的氨氮含量。讨论了pH、水样存放时间等因素对测定结果的影响,并根据实验结果得出了羽毛洗净时洗涤废水的氨氮值,为制定羽毛洗净标准提供了参考。结果表明:在氨氮含量为0.7231mg/L时对应羽毛批次已洗净,pH值对测定结果影响较大。

The content of N-NH3 in waster water of washed feathers was measured by salicylic acid spectro- photometry method. The effect of the factors, such as store time of water sample and pH value, was stud- ied. The N-NH3 value of cleanly washed feathers is obtained, which can provide the reference for the clean standard of feathers. The results show that when the content of N-NH3 is 0. 723 mg/L, the corresponding feathers are washed cleanly. The measurement results are greatly influenced by the pH valve.