CPAM对河道泥水混合物的絮凝效果研究

Flocculation Effect of Cationic Polyacrylamide on Mud-water Mixture in River

河道淤泥使水体变黑发臭,严重影响水体环境。近年来,利用清淤船吸取河道底部泥水混合物,然后添加絮凝剂加速泥水分离,从而达到清淤效果的应用研究已初步展开。但絮凝剂投加量对河道泥水混合物絮凝效果的影响尚未有系统的研究,严重影响了清淤船的设计。基于此,通过絮凝实验研究了阳离子型聚丙烯酰胺(CPAM)投加量对泥水混合物分离沉降效果的影响,以及分离后的出水水质。结果表明,当CPAM投加量达到0.79 mg/g时,泥水快速分离效果明显,出水浊度和COD值显著降低。

River silt makes the water black and smelly,which seriously affects the water environmental quality.In recent years,dredging boat has been preliminarily applied in river dredging.It absorbs the mud-water mixture at the bottom of the river and then adds flocculants to accelerate the separation of mud and water,so as to achieve dredging of the rivers.However,the effect of flocculant dosage on flocculation performance has not been systematically investigated,which seriously affects the design of dredging boat.Therefore,effects of dosage of cationic polyacrylamide(CPAM)on separation of mud-water mixture and quality of the effluent after separation were explored through flocculation experiments.When the dosage of CPAM reached 0.79 mg/g,obvious mud-water separation performance was achieved,and turbidity and COD in the effluent were significantly reduced.