秋冬季节对矿化垃圾反应器处理渗滤液效果的影响

Effect of Temperature on Aged Refuse-based Reactor Treating Leachate during Autumn and Winter

采用二级矿化垃圾生物反应器小试装置,研究了秋冬季节对反应器处理渗滤液效果的影响。试验结果表明,第一级反应器出水平均化学需氧量(COD)浓度从秋季的1 076 mg/L上升到冬季的3 084 mg/L,第二级反应器出水COD浓度由秋季的373 mg/L上升为冬季的666 mg/L;相应地,第一级反应器的COD去除率从秋季的70%降到冬季44%,第二级从秋季的60%升到冬季78%,系统总的COD去除率从秋季的90%降到冬季的88%。第一级反应器出水平均氨氮(NH3-N)浓度由秋季的315 mg/L升到冬季的711 mg/L,第二级反应器出水平均NH3-N浓度从秋季的6.5 mg/L升到冬季的52 mg/L。第一级反应器的NH3-N去除率从秋季的69%降到冬季42%,第二级从秋季的98%降至冬季94%。系统总的NH3-N从秋季的99%降到冬季的96%。因此,温度对系统的处理效果是有影响的,并且对第一级反应器的影响要大于第二级。

Effect of temperature on two stage aged-refuse-based reactor treating leachate was studied in autumn and winter. Results showed that＇average concentration of COD in treated effluent increased from 1 076 mg/L of autumn to 3 084 mg/L of winter in the first stage reactor and from 373 mg/L of autumn to 666 mg/L of winter in the second stage reactor. Average concentrations of NH3-N in treated effluent increased from 315 mg/L of autumn to 711 mg/L of winter in the first stage reactor and from 6.5 mg/L of autumn to 52 mg/L of winter in the second stage reactor. Accordingly, average removal rates of COD decreased from 70% of autumn to 44% of winter in the first stage reactor and increased from 60% to 78% in the second stage reactor. Average removal rates of NH3-N decreased from 69% of autumn to 42% of winter in the first stage reactor and from 98% to 94% of winter in the second stage reactor. So the effect of temperature on the first stage aged refuse reactor is more than that of the second stage aged refuse reactor.