联合生物反应器处理农村生活垃圾渗滤液中Fe的变化规律

以厌氧（AN）-准好氧（SA）联合生物反应器中渗滤液pH、COD、UV254、NH3-N以及铁离子浓度的监测结果为依据，研究了厌氧-准好氧联合生物反应器处理农村生活垃圾产生的渗滤液中Fe的变化规律。结果表明，渗滤液中Fe的浓度随时间变化规律为先上升后下降，在填埋第76天左右，厌氧和准好氧单元中Fe的浓度先后达到最大值73.44和78.71 mg·L-1；在第350天，厌氧和准好氧单元中Fe的浓度分别降至17.84和8.52 mg·L-1。Pearson相关分析显示渗滤液中铁离子的浓度与COD之间存在显著的正相关关系；与pH、NH3-N之间存在负相关关系；而与UV254之间的相关关系较弱。

Change law of Fe in hybrid bioreactor leachate treating household solid wastes

In this work, the change law of Fe was studied in anaerobic (AN)-semi-aerobic (SA) bioreactor leachate created by treating household solid wastes. Changes were related to pH, UV254 value, COD, NH3-N, and the iron concentration of the leachate. Results indicated that the leachate iron concentrations of anaerobic and semi-aerobic units increased with time and peaked at 73.44 and 78.71 mg·L-1, respectively, after about 76 d, and then decreased to 17.84 and 8.52 mg·L-1, respectively, by 350 d. Pearson correlation analysis revealed that the leachate iron concentration displayed a significant positive correlation with COD, and a negative correlation with pH and NH3-N. There was no relationship between leachate iron concentration and UV254.