生物滴滤池反硝化脱氮试验研究

采用一套内部填充多孔蜂窝陶瓷填料的生物滴滤池,研究了在不同温度下3种不同类型的碳源(甲醇、醋酸钠和葡萄糖)以及不同的C N对于系统反硝化效果的影响。结果表明,不同碳源对于系统的反硝化能力有很大的影响,采用甲醇和葡萄糖不会引起亚硝酸盐的积累,而醋酸钠会引起明显的亚硝酸盐积累,在硝酸盐基本消耗完的时候达到最大的积累值(初始硝酸盐总量的2 0 % )。不同碳源的最佳操作温度有所不同,3种碳源在4 0℃下都具有较好的反硝化效果。

STUDY ON NITROGEN REMOVAL BY TRICKLING FILTER

This paper experimentally studies the influence of different carbon sources (methanol,glucose and sodium acetate)at different temperatures and C/N ratio on denitrification in a trickling filter filled in porous honeycomb ceramic.The results show that carbon source has great effect on denitrifictation efficiency,that is,when methanol and glucose are serviced as carbon source,there will be no nitrite accumulation in the system.But there has been observation of obvious nitrite accumulation while sadium acetate selected as carbon source.And the maxiumum nitrite accumulation (20% of the initial nitrate-nitrogen)has reached while nitrate has run out.The result also illustrates that optimal temperature relates with carbon source and the denitrification efficiencies with the different carbon sources are quite well at 40 ℃.