氮源对气相生物滴滤床净化效果的影响

氮源对于气相生物滴滤床的净化效果有显著的影响。由于喷淋液体在生物滴滤床中分布不均匀 ,导致床层中局部氮源不充足 ,从而使滤床的去除效果降低。提高喷淋液中氮源的浓度 ,可以较大幅度提高净化效率。采用NH-4 N会导致滤床中硝化细菌的生长和累积 ,使得异养菌和硝化细菌在溶解氧、氮源和填料空间上形成竞争 ,并致使氮源分布不均匀 ,而采用NO3 N作为氮源可以改善这种状况

The nitrogen source''''s effects on the performance of air phase trickling biofilter

The nitrogen source's effects on the purification performance of air phase trickling biofilter are significant. Because of the uneven distribution of nutrient liquid in the filter, the nitrogen sources are inaccessible to bacterium at some parts of the solid media that cause the decrease of purification efficiency. Increasing the mass density of nitrogen sources in the nutrient liquid can largely enhance the performance of filter. Use the NH - 4 N as the sole nitrogen nutrient source results in uneven distribution of nutrient source and the development and accumulation of nitrifying bacteria, which will compete with VOC degradator in the dissolved oxygen, nitrogen nutrient source and the space between the solid medium. Choose NO - 3 N as the sole nitrogen nutrient source can ameliorate this status.