摘要
考察了投加超细粉体(200目)凹凸棒石对聚合氯化铝(PAC)混凝沉淀去除富营养化河水中藻类的影响。结果表明,添加凹凸棒石能大大提高PAC对浊度和叶绿素a的去除效果,且可以明显增加絮体的密度,改善絮体的沉降性能,抑制絮体中藻类的上浮。当PAC投量为40mg/L、凹凸棒石投量为0.08%时,PAC与凹凸棒石联用对浊度和叶绿素a的去除率较单用PAC时分别提高了14.5%和14.0%,形成的絮体沉降体积仅为单用PAC时的1/2,降低了后续处理难度。
The influence of micro-size powdered attapulgite （200 mesh） on removal of algae from eutrophication river water by PAC was investigated. The results show that addition of attapulgite can ef- fectively enhance the removal efficiency of turbidity and chlorophyll-a, evidently increase the density of floc, improve the settleability of floc and inhibit the flotation of algae in floc. When the dosages of PAC and attapulgite are 40 mg/L and 0.08% , the removal rates of turbidity and chlorophyll-a by the combina- tion of PAC and attapulgite are increased by 14.5% and 14.0% respectively compared with the single PAC. The sedimentation volume of the formed floc is only half of single PAC. Therefore, the difficulty of the follow-up treatment is decreased.
出处
《中国给水排水》
CAS
CSCD
北大核心
2009年第21期53-55,共3页
China Water & Wastewater
基金
国家高技术研究发展计划(863)项目(2005AA601010-03)
关键词
超细粉体凹凸棒石
聚合氯化铝
助凝
藻类
micro-size powdered attapulgite
polyaluminium chloride （PAC）
coagulation aid
algae
