气浮-·OH强氧化组合工艺处理高藻水的研究

以库区天然水培养的二形栅藻(Scenedesmus dimorphus)为研究对象,利用大气压强电场电离放电产生羟基自由基(·OH),结合压力溶气气浮前处理工艺处理高藻水.实验结果表明,对于藻密度为65.6×10~4 cells/mL,浊度为10.8NTU,COD_(Mn)为6.74mg/L的高藻水,在总氧化剂TRO浓度为1.03 mg/L时,藻类去除效率达到100%;总细菌,总大肠菌群和大肠埃希氏菌均未检出;出水COD_(Mn)由1.43 mg/L降至1.25mg/L,降低了10%;浊度由0.66NTU降至0.54NTU,降低了12.59在排放高藻水的主管路中·OH杀藻的接触反应时间仅为6s.因此汽浮-·OH强氧化组合工艺可高效快速地处理高藻水,为保障水源水的供水安全探索了一种新的思路.

Algae-laden water treatment using air flotation combined with advanced oxidation technology

In this study, an integrated air flotation and advanced oxidation process (AOP) facilitated by ×OH, resulting from strong ionization discharge, was applied to address this problem. For this purpose, natural reservoir water was used to culture Scenedesmus dimorphus to prepare synthetic water laden with algae cells concentration of 65.6×104cells/mL, turbidity of 10.8NTU and CODMn of 6.74mg/L, and the applied TRO dosage of 1.03mg/L. Almost complete removal of algae and bacteria (total bacteria, coli bacteria and E.coli) was achieved within 6s, while the CODMn of treated water decreased by 10% from 1.43mg/L to 1.25mg/L, its turbidity decreased by 12.59% from 0.66NTU to 0.54NTU. This suggest that this integrated treatment was effective for treatment of algae-laden wastewater, thus ensuring the safety of water supply.