中南大学学报（自然科学版）2013，Vol.44Issue(7)：3061-3065,5.
剩余污泥在混合碱条件下发酵回收碳源和氮磷元素
Recovery carbon source, nitrogen and phosphorus by fermenting waste activated sludge at mixed base condition
摘要
Abstract
The hydrolysis and acidification of waste activated sludge were investigated under three types of alkaline conditions,i.e.NaOH,Na3PO4 and combination of NaOH and Na3PO4.Temperature and pH were controlled at 35 ℃ and 10 respectively for all alkaline conditions investigated.Then the recovery of ammonia and phosphorus from the three types of alkaline fermentation liquid was conducted.Finally,the cost for recovering carbon source,ammonia and phosphorus was checked.The results show that the hydrolysis and acidification abilities of WAS under the three types of alkaline conditions are similar.Whereas,the molar ratio of phosphorus and ammonia is close to 1∶1 under the alkaline condition which is controlled by combination of NaOH and Na3PO4,which benefits ammonia and phosphorus recovery in the form of struvite.The ammonia and phosphorus recovery efficiencies are equivalent when pH values are controlled by NaOH and combination of NaOH and Na3PO4.However,the cost for recovering carbon source,ammonia and phosphorus is the least when pH is controlled by combination of NaOH and Na3PO4.The process of recycling carbon source,phosphorus and ammonia from waste activated sludge can be optimized by fermenting waste activated sludge at the combination of NaOH and Na3PO4 condition.关键词
剩余污泥/水解酸化/碳源回收/氮磷元素/碱性环境Key words
waste activated sludge/ hydrolysis and acidification/ carbon source recovery/ nitrogen and phosphorus/alkaline condition分类
资源环境引用本文复制引用
苏高强,汪传新,彭永臻..剩余污泥在混合碱条件下发酵回收碳源和氮磷元素[J].中南大学学报（自然科学版）,2013,44(7):3061-3065,5.基金项目
国家自然科学基金资助项目(51178007) （51178007）
