表面活性剂对生物沥滤去除污泥中铜、锌的影响

摘要

Series of batch experiments are conducted to research the effects of three surfactant (Tween-80 ,Span-60 and betaine) on the bioleaching of sewage sludge .The optimal concentration range follows this order 0 .5% -0 .7% (Tween-80) ,3 .0-6 .0 g/L (Span-60) and 1 .5-3 .0 g/L (betaine) respectively .Under the condition of adding each surfactant of the above concentration ,after 10 days the removal efficiencies of heavy metals reach above 80% and the oxidation rate of sulfur has been improved compared to no adding of surfactants .%将Tween－80，Span－60和甜菜碱，分别添加到城市污水处理厂污泥中，进行序批式生物沥滤，研究表面活性剂的浓度和类型对污泥中Cu ，Zn沥滤效果的影响。结果表明，3种表面活性剂的适宜投加量范围依次为：0．5％～0．7％、3．0～6．0g／L和1．5～3．0g／L。在此条件下沥滤10d，Cu和Zn的去除率均可达到80％以上。与未添加表面活性剂相比，硫的氧化利用率也得到了一定的提高。