CAJ | 학술논문

为解决水力吹填泥浆自由沉降所需时间较长，退水排放会带走大量淤泥，以及吹填土地基自然固结时间长等问题，向泥水混合液分别投加聚合氯化铝( PAC )和聚丙烯酰胺( PAM )，搅拌静置沉淀后测定混合液剩余浊度、剩余固体悬浮物质量浓度( SS)及泥水界面高度，考察其混凝沉降性能。试验结果表明，投加混凝剂能在一定程度上加速吹填泥浆的沉降分离，提高出水水质。随着PAC和PAM投加量的增加，混合液剩余浊度和剩余SS值均呈现先降低后升高的趋势，而泥水界面高度基本保持不变。当PAC投加量为360 mg/L时，混合液剩余浊度和剩余SS达到最小值，分别为287.4和1.45 g/L；当PAM投加量为2.8 mg/L时，混合液剩余浊度和剩余SS最小，分别为752.7和2.83 g/L。
위해결수력취전니장자유침강소수시간교장，퇴수배방회대주대량어니，이급취전토지기자연고결시간장등문제，향니수혼합액분별투가취합록화려( PAC )화취병희선알( PAM )，교반정치침정후측정혼합액잉여탁도、잉여고체현부물질량농도( SS)급니수계면고도，고찰기혼응침강성능。시험결과표명，투가혼응제능재일정정도상가속취전니장적침강분리，제고출수수질。수착PAC화PAM투가량적증가，혼합액잉여탁도화잉여SS치균정현선강저후승고적추세，이니수계면고도기본보지불변。당PAC투가량위360 mg/L시，혼합액잉여탁도화잉여SS체도최소치，분별위287.4화1.45 g/L；당PAM투가량위2.8 mg/L시，혼합액잉여탁도화잉여SS최소，분별위752.7화2.83 g/L。
In order to solve the problems that a long period is needed in the free settlement of the hydraulic-dredged mud, a large quantity of silt particles is brought away during the discharge of the recession flow, and a long period is also needed for the natural consolidation of the dredged mud foundation, PAC or PAM was added into the mud mixture individually in the study. After the agitation and precipitation, the residual turbidity, the residual SS of the supernatant and the height of the interface between supernatant and sediments were measured to investigate the coagulation sedimentation property. The experimental results show that both residual turbidity and SS value decrease first and then increase, and the interface remains unchanged with an increased dosage of PAC or PAM. When a PAC dosage of 360 mg/L was added, the minimum residual turbidity and SS value were obtained with the values of 287.4 and 1.45 g/L, respectively. When a PAM dosage of 2.8 mg/L was added, the minimum residual turbidity and SS value were obtained with the values of 752.7 and 2.83 g/L, respectively. The addition of coagulants could in some extent promote the settling and separation of the hydraulic-dredged mud, and enhance the water quality of the recession flow.