锯木屑对水体中总磷、氨氮、COD含量的影响

The Effect of Sawdust on the Total Phosphorus,Ammonia Nitrogen and COD Concentration in Water

通过研究锯木屑与自然环境中水体的相互作用,发现加入锯木屑会对水体中的总磷、氨氮、COD(化学需氧量)产生显著影响,而导致水体环境的恶化。实验主要从锯木屑与水体接触时间、锯木屑的质量、锯木屑与水体作用的pH环境做了详细研究。结果显示:①接触时间上,短时间接触导致水体总磷增加率变化最大,COD增加率比氨氮增加率变化大;②锯木屑质量上,都会导致总磷、氨氮、COD的增加,其中COD增加率变化最快,其次总磷增加率,最后氨氮增加率;③pH上,在pH等于5时,总磷增加率最高,COD增加率最低,pH对氨氮增加率变化不明显,在中性pH下,氨氮增加率最低。

The interaction between sawdust and the natural environment water was studied. The results showed that sawdust would had a significant impact on total phosphorus, ammonia nitrogen and COD in water, which would cause deterioration of water environment. The experiment made a detailed study on the contact time of sawdust and water, the quality of sawdust and the pH environment of the interaction between sawdust and water. The resuhs showed that these factors were related. First, contact time, short - term exposure would lead to the greatest growth rate of total phosphorus in water and COD variation in growth rate was bigger than the rate of increase in ammonia nitrogen. Second, the quality of sawdust would lead to the increase in total phosphorus, ammonia nitrogen and COD. Among them, the fastest was the growth rate of COD, secondly was the growth rate of total phosphorus, the last was the growth rate of ammonia nitrogen. Third, when pH = 5, the growth rate of total phosphorus was the highest and the growth rate of COD was the lowest, and pH could not have significant impact on the growth rate of ammonia nitrogen, which was the lowest at neutral pH.