论文部分内容阅读
采用“电絮凝-流态化微电解耦合法”技术处理铅锌冶炼废水,主要考察了pH、水力停留时间、铁炭投加量、电压、铁炭粒度等反应条件对废水中铅、氟离子去除率的影响,并对比了不同电极材料、不同电极数量和极板间距下的处理效果。研究结果表明,铝电极对铅锌冶炼废水具有更好的处理效果;在最佳工艺条件(考虑能耗成本),即采用四块铝电极、pH 4.0、水力停留时间30 min、铁炭投加量45 g、电压5 V、铁炭粒度20~27目时,电絮凝-流态化微电解耦合法对废水中各离子的去除效果最佳;处理实际铅锌冶炼废水时,铅去除率达到了99.9%,氟去除率达到了82.7%,各种离子残留浓度均低于污水综合排放标准(GB 8978-1996)一级标准值。
Lead-zinc smelting wastewater was treated with “electro-flocculation-fluidized microelectrolysis coupling method”. The effects of reaction conditions such as pH, hydraulic retention time, dosage of iron and carbon, voltage and particle size of iron- , Fluoride ion removal rate, and compared the different electrode materials, the number of different electrodes and plate spacing under the treatment effect. The results show that the aluminum electrode has a better treatment effect on lead-zinc smelting wastewater. Under the optimum process conditions (considering energy cost), four aluminum electrodes, pH 4.0, hydraulic retention time 30 min, Volume 45 g, voltage 5 V, iron-carbon particle size 20 ~ 27 mesh, electro-flocculation-fluidized microelectrolysis coupled with the best removal of ions in the wastewater; the actual lead-zinc smelting wastewater treatment, the removal rate of lead Reached 99.9%, the fluorine removal rate reached 82.7%, and the residual ion concentrations of all kinds were lower than the first class standard value of the comprehensive wastewater discharge standard (GB 8978-1996).