非硫酸盐高浓度有机废水酸化的可生化性指标

Study on the BiOdegradability Indexes for Evaluation the Acidification of Non-sulfate High Strength Organic Wastewater

利用表观B／C指标和理论B／C指标评价了厌氧酸化过程对蔗糖一蛋白胨人工废水可生化性的影响．结果显示对于COD为1064—63900mg／L的废水，采用表观B／C评价指标，废水的可生化性降低了0％-96％；采用理论B／C指标，可生化性提高幅度为2％～21．6％．实验结果表明用理论B／C指标评价厌氧酸化过程对蔗糖-蛋白胨人工废水可生化性的影响较之表观B／C更为科学合理；同时说明对于非硫酸盐废水类型，理论B／C作为评价其酸化过程改变废水可生化性的指标同样适用；酸化出水的理论B／C随废水COD增加呈现下降的趋势，理论分析认为其与废水的酸化度（α）有关，酸化度越低，酸化出水的理论B／C越低．

The indexes of theoretical B/C and apparent B/C were used to evaluate the effect of anaerobic acidification process to the biodegradability of sugar-peptone manual make-up wastewater. The results showed that for the wastewater of COD from 1 064 rng/L to 63 900 mg/L. Their biodegradability declined from 0% to 96% when the apparent B/C index was adopted. But ＇increased by 2% to 21.6% when the theoretical B/C index was intoduced. It indicated that the theoretical B/C index were more reasonable than the apparent B/C index to evaluate the effect of anaerobic acidification process to the biodegradability of sugar-peptone manual make-up wastewater,and the theoretical B/C index Was also applicable to non. Sulfate organic wastewater. Additionally, it showed that the theoretical B/C of the effluent was inclined to decrease along with the increase of COD of the wastewater,and such a tendency was considered to be related to the Acidification Degree （α） . When acidification degree was lower,the theoretical B/C of the effluentwoulclbe lower.