【摘要】 采用两段式高温好氧堆肥工艺 ,研究了污泥堆肥中氮素转变规律。研究表明 ,硝化作用受到温度和NH+ 4 N含量的影响显著。一次发酵中 ,堆料平均温度高于 4 0℃ ,硝化作用受到强烈抑制 ;二次发酵后期 ,由于NH+ 4 N浓度降低 ,故硝化过程减缓。不同调理剂及操作条件对氮素损失影响较大 ,利用腐熟堆肥作为调理剂可以减少氮素损失。适当降低堆料温度、增加初始含水率及适当减少初始挥发份含量等措施均可在一定程度上减少氮素损失更多还原

【Abstract】 Studies on nitrogen transition behavior of high-temperature aerobic composting of sewage sludge were reported in this paper. The results showed that temperature and NH + 4-N content were two parameters, which significantly affected nitrification. Nitrification was restrained at an average temperature beyond 40 ℃ during primary fermentation. At the end of secondary fermentation, nitrification was slowed down with the reduction of NH + 4-N content. The amounts of nitrogen loss were different under different conditions or by using different conditioners. By adding mature compost as a conditioner to sludge, we could get less nitrogen loss. Nitrogen loss reduction could also be achieved to some extent by reducing temperature and content of volitile matter or adding more water to raw material.更多还原