全程自养脱氮特性因子的研究

Study on Key Factors of Autotrophic Ammonia Removal Technology

以消化污泥脱水液为基质 ,两级串联悬浮填料床反应器的NH+ 4 -N平均表面负荷为 3～ 4g (m2 ·d) ,总的全程自养脱氮率达 6 5 %～70 %。对反应器中的生物膜污泥采用批式实验 ,研究了全程自养脱氮的特性影响因子。结果表明 :只有在DO限制 (如 0 8mg L左右 )条件下 ,生物膜污泥才能进行彻底而正常的全程自养脱氮作用 ;全程自养脱氮的适宜pH范围约在 7 5～ 8

The autotrophic ammonium\|removal process was realized in carrier\|suspend bed reactors with sludge liquor as substrate.The NH\++\-4-N average surface load of two reactors in series is 3～4?g/(m\+2·d),and the general autotrophic ammonium\|removal efficiency is about 65%～70%.The main influence factors of autotrophic ammonia removal were studied in batch tests by use of the biofilm from the reactors.The results show that the autotrophic ammonia\|removal process will go on only under the limited oxygen conditions (e.g.around 0 8?mg/L) and that the optimum pH range for autotrophic ammonia removal is 7 5～8 5.