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在不同水力停留时间(HRT)下考察了阴离子交换膜生物反应器对饮用水中ClO4-的还原效果。研究结果表明,在进水ClO4-浓度为60μg/L情况下,HRT从5h逐渐降低到2.5h,水流动室出水ClO4-浓度随着HRT降低呈增大趋势,但运行稳定后出水ClO4-浓度均低于18μg/L。厌氧生物反应室在HRT降低初期高氯酸盐有一定的积累,随着运行时间的增加,积累的ClO4-能被厌氧微生物还原,厌氧污泥混合液中ClO4-浓度低于2.0μg/L,说明厌氧生物反应室具有较强的抗负荷冲击能力。水流动室出水pH稳定在7左右,电导率和Cl-随着HRT降低而增大。
The effect of anion exchange membrane bioreactor on the reduction of ClO4- in drinking water was investigated under different hydraulic retention time (HRT). The results showed that the HRT decreased gradually from 5h to 2.5h when the influent ClO4- concentration was 60μg / L, and the ClO4- concentration in effluent from the water flow chamber increased with the decrease of HRT. However, after running stable, the ClO4- All lower than 18μg / L. The anaerobic bioreactor had a certain accumulation of perchlorate in the initial period of HRT reduction. With the increase of operating time, the accumulated ClO4- could be reduced by anaerobic microorganisms. The concentration of ClO4- in the anaerobic sludge mixture was lower than 2.0μg / L, indicating that anaerobic biological reaction chamber has a strong resistance to load impact. Water flow chamber effluent pH stable at about 7, the conductivity and Cl- increases with decreasing HRT.