产酸脱硫反应器中碳硫比对群落生态特征的影响

通过产酸脱硫反应器处理高浓度含硫酸盐废水的连续流试验,从群落动态的角度研究碳硫比(COD/SO₄^2-)从4.2降低到2.0的过程中,pH值、氧化还原电位(ORP)、碱度(ALK)和末端产物(VFAs)组成、优势种群分布等群落生态特征的变化规律试验证明,在此过程中ORP和ALK提高,而pH值和VFAs中乙酸的分布比例降低,群落类型由高碳硫比稳定型转化为低碳硫比亚稳定型,但仍未改变乙酸型顶极群落的典型特征.

Effect of COD/SO_4~(2-)Ratio on the Ecological Characteristic in Acidogenic Sulfate-reducing Reactor

Continuous-flow experiment was conducted in acidogenic sulfate-reducing reactor,which was fed with high strength sulfate wastewater, to study the change law of pH value, ORP (oxidation reduction potential), VFAs (volatile fat acids), ALK (alkalinity) and the distribution of preponderant populations subjected by decreasing COD/SO₄^2- ratio from 4.2 to 2.0. It was demonstrated that during this course of change, ORP and ALK increased, while pH value and the proportion of acetic acid accounting for VFAs decreased significantly, and the type of climax community was changed from stable type with high COD/SO₄^2- ratio to sub stable type with low COD/SO₄^2- ratio, but it was still belonged to typical acetic acid type climax community.