球形填料对复合垂直流土地渗滤系统去污效果的生物强化

Biodegradation enhancement of contamination removal in integrated vertical flow infiltration system by spheric shape fillings

通过对复合垂直流渗滤系统中增加球型填料,利用生物强化提高系统对城市生活污水污染物去除能力的研究,优化了复合垂直流渗滤系统。并且通过研究,探索了系统非生物作用与生物作用对氮的降解机制。结果表明,通过生物强化系统生活污水中COD的去除率由原来的74.7%提高到85.3%;对NH3-N的去除率由原来的28.7%提高到52.9%;对TN的去除率从31.0%提高到41.7%;系统对TP的去除率由30.9%提高到49.3%。球形填料通过提高系统的硝化活性,增加对氨氮的降解转化效率,同时生物量的大小,也是影响氨氮的降解转化效率的重要因素。系统对污水中氮的降解是以生物作用为主,氮转化以硝化效果较强,反硝化效果比较弱。

The effects of contamination removal were researched to treat municipal wastewater by biodegradation enhanced with adding spherical fillings in integrated vertical-flow infiltration system（IVIS）. The IVIS technological parameters were optimized by experiments. The result showed that the removal rates of contamination in wastewater were increased by biodegradation enhancement, COD from 74.7% to 85.3 % , NH3-N from 28.7% to 52.9% ,TN from 31.0% to 41.7% and TP from 30.9% to 49.3% respectively. The degradation efficiency of NH3-N was increased with the increase of nitrification by adding more spherical fillings in IVIS. The quantity of microorganism is an important factor affecting degradation efficiency of NH3-N. The biodegradation is the main process compared with abiotic interception in removal of nitrogen in the system. Nitrogen transformation is mainly result of nitrification, and denitrification is relatively weak in IVIS.