硫化物型自养反硝化中NO_2^--N与S^0的积累条件

Condition of Accumulating Nitrite and Sulfur on Sulfide Autotrophic Denitrification

厌氧氨氧化所需的电子受体NO2--N可由亚硝化过程获得也可由半反硝化过程获得。对于含有NO3--N的废水,可通过以S2-为电子供体的自养反硝化过程把NO3--N还原为NO2--N。文章从pH值、S/N摩尔比、硫化物浓度、HRT、COD等方面,探讨以S2-为基质的硫自养反硝化中NO2--N与S0的积累条件,为硫化物型自养反硝化-ANAMMOX工艺提供理论依据。

Nitrite as a kind of electron acceptor which is required in the process of ANAMMOX, can be achieved by partial nitrification or partial denitrification. Nitrate in the wastewater can be reduced to nitrite with sulfide serving as an electron donor on sulfide autotrophic denitrification process. This paper discussed the condition of accumulating nitrite and sulfur on sulfide autotrophic denitdfication from pH, S/N ratio, sulfide concentration, HRT and COD, which would provide theory evidence for sulfide autotrophic denitrification-ANAMMOX combined technology.