摘要
本试验探讨了含甲醇化工废水污泥膨胀的原因和控制对策。不同有机负荷 ( 0 .2 2kg COD/ (kgMLSS·d)、0 .35kgCOD/ (kgMLSS·d) )和 pH水平 ( 6 .2 ,7.5 )对污泥膨胀的影响试验表明 ,过低的有机负荷 ( 0 .2 2kgCOD/ (kgMLSS·d) )是引起污泥膨胀的主要因素 ,而低 pH水平( 6 .2 )加剧了低负荷下污泥膨胀的发生。通过控制SBR工艺条件 (有机负荷 0 .35kgCOD/(kgMLSS·d) 左右 ,pH大于7.5 )可以有效控制污泥膨胀 ;通过投加 70mg/L的Ca(ClO) 2 可明显缩短控制污泥膨胀的周期 ,CODCr去除率从 5 5 %恢复到 90 %以上。
The inducing factors of and controlling measures for sludge bulking in methanol wastewater were researched by experiments with two different sludge loads (0.22kgCOD/kg MLSS·d; 0.35kgCOD/kg MLSS·d) and two different pH (6.2; 7.5) conditions. The experimental results show that bulking occurs when low sludge loading is maintained and bulking aggravates when pH is lower(6.2). When SBR operational condition is changed (loading at about 3.5kgCOD/kg MLSS·d and pH over 7.5), bulking will be controlled. However, if 70mg/L Ca(CIO) 2 is added in SBR reactor, the control period is shortened evidently and the degradation rate of organism rises again.
出处
《浙江树人大学学报》
2001年第4期61-64,70,共4页
Journal of Zhejiang Shuren University
