黄河水体颗粒物对硝化过程的影响研究

Effect of Particulates on Nitrification in Natural Waters of the Yellow River Under laboratory Conditions

针对黄河高含沙量的特点,通过模拟实验研究了颗粒物对氨氮硝化速率的影响.结果表明:颗粒物含量对水体的硝化速率存在着较显著的影响,颗粒物含量越高,硝化过程进行越快.其影响机制主要是:(1)水体颗粒物对氨氮存在吸附作用;(2)水体中颗粒物的含量影响体系氨化细菌、亚硝化细菌和硝化细菌的生长;(3)各种菌在固液两相生长规律不同.

In view of the high content of suspended matters in the Yellow River, the effect of particulates on nitrification has been studied under laboratory conditions. The results indicated that particulates exert significant effect on the nitrification processes, and the nitrification rate increased with the increase of particulate concentration. The mechanisms were elucidated. First, ammonium nitrogen can be absorbed on the particulates. Second, the particulates produce effect on the growth of ammonifying bacteria, nitrosobacteria and nitrobacteria. Third, the bacteria growth in liquid phase was different from that in solid phase.