CAJ | 학술논문

采用聚合氯化铝(PAC)、聚合氯化铝铁(PAFC)、聚合硫酸铁(PFS)、聚合硫酸铝(PAS)和硫酸铝(AS)五种混凝剂对某含藻湖水进行强化混凝除藻、除浊试验研究,考察了混凝剂种类及投量、原水pH、沉降时间等因素对强化混凝效果的影响.结果表明,五种混凝剂的综合除藻、除浊性能排序为:PACPAFCPFSPASAS;在原水pH值为5～9的范围内,含铁混凝剂PFS和PAFC对pH的适应性较强,且在pH值为5～7的弱酸性条件下,PFS的除藻、除浊性能最优,当其投量为4 mg/L时,除藻率近80%,除浊率可达80%以上;而在pH值为7～9的弱碱性条件下,PAC则表现出更好的除藻、除浊效果,当其投量为4 mg/L时,除藻率和除浊率可分别达到83%和90%;AS对pH的适应性最差,其除藻、除浊效果最差;另外,五种混凝剂的除藻率、除浊率均随沉降时间的延长而增大,最佳沉降时间为20 min.
채용취합록화려(PAC)、취합록화려철(PAFC)、취합류산철(PFS)、취합류산려(PAS)화류산려(AS)오충혼응제대모함조호수진행강화혼응제조、제탁시험연구,고찰료혼응제충류급투량、원수pH、침강시간등인소대강화혼응효과적영향.결과표명,오충혼응제적종합제조、제탁성능배서위:PACPAFCPFSPASAS;재원수pH치위5～9적범위내,함철혼응제PFS화PAFC대pH적괄응성교강,차재pH치위5～7적약산성조건하,PFS적제조、제탁성능최우,당기투량위4 mg/L시,제조솔근80%,제탁솔가체80%이상;이재pH치위7～9적약감성조건하,PAC칙표현출경호적제조、제탁효과,당기투량위4 mg/L시,제조솔화제탁솔가분별체도83%화90%;AS대pH적괄응성최차,기제조、제탁효과최차;령외,오충혼응제적제조솔、제탁솔균수침강시간적연장이증대,최가침강시간위20 min.
The enhanced coagulation tests for removing algae and turbidity from water in a lake were performed using PAC, PAFC, PFS, PAS and AS respectively.The influences of coagulant type and dosage, pH of raw water and sedimentation time on the enhanced coagulation efficiency were investiga-ted.The results show that the performance order of these coagulants for algae and turbidity removal is: PAC > PAFC > PFS > PAS > AS.When the pH ranges from 5 to 9, the iron-containing coagulants such as PFS and PAFC have a stronger adaptability.When the pH ranges from 5 to 7, PFS has the best effect, and the removal rates of algae and turbidity are about 80% and above when the dosage is 4 mg/L.When the pH ranges from 7 to 9, PAC has the best effect, and the removal rates of algae and turbidity are 83% and 90% respectively when the dosage is 4 mg/L.AS has the poorest adaptability to pH change and the lowest removal efficiency of algae and turbidity.The removal rates of algae and turbidity by the five coag-ulants all increase with the prolonging of sedimentation time, and the optimal sedimentation time is 20 min.