活性污泥法处理含铜废水的研究

Treatment of Wastewater Containing Cu～(2+) Ions Using Activated Sludge

文章用排污口池底的絮状和颗粒状两种污泥处理高浓度含铜模拟废水。絮状污泥对文章考察的浓度范围(0.02～0.12mol/L)内的铜离子的吸附率均在54%以上,并且随金属浓度的变化不大;而颗粒状污泥处理浓度为0.02mol/L的Cu2+溶液时,吸附率最高可达53.1%,当Cu2+浓度增加为0.12mol/L时吸附率骤降至18.3%。可见污泥粒径越小,其比表面积越大,吸附能力也就越强。另外,对于高浓度的重金属铜污染来讲,絮状污泥的最大吸附量明显高于颗粒状污泥。

In the paper,the flocculent sludge and the granular sludge under the sewage lagoon were used to removal the artificial wastewater containing Cu2＋ of high concentration.In the investigated range（0.02～0.12 mol/L） of the Cu2＋ concentration,the adsorption efficiency of flocculent sludge was above 54 %,and the adsorption efficiency was nearly steady.For the granular sludge,the adsorption efficiency reached 53.1 % when concentration of Cu2＋ was 0.02 mol/L,but dropped to 18.3 % when concentration of Cu2＋ was 0.12 mol/L.The results showed that the flocculent sludge had better adsorption capacity than the granular one for high concentration of Cu2＋,and showed that activated sludge of smaller particle size had more surface areas,and had better adsorption capacity.Additionally,the maximum adsorption capacity of the flocculent sludge was higher than that of the granular one.