摘要
以印染厂、造纸厂、给水厂、城镇污水厂水处理产生污泥为研究对象,先对典型污泥的性质进行了探究,然后分别投加FeCl3、聚丙烯酰胺(PAM)调理剂,经抽滤和压滤实验,综合考察污泥滤饼的含水率、比阻、浊度等指标。结果表明,造纸污泥的比阻(SRF)最高(为3.51×109s2/g),束缚水含量和滤饼含水率最低,分别为13.3 g/g干泥和79.6%,比阻决定了脱水速率,含水率与束缚水含量呈负相关;污水厂污泥、印染污泥、造纸污泥最佳FeCl3投加量分别为10%、9%、8%,压滤后含水率分别为65.4%、60.9%、62.7%。最佳PAM投加量分别为0.2%、0.4%、0.3%,压滤后含水率分别为63.1%、59.6%、62.1%。污水厂污泥含水率最高,说明纯生化污泥一般较难脱水,污水厂污泥经复合调理(PAM、FeCl3投加量降至0.15%、4%),含水率降至60.3%,说明复合调理效果较好,且单一药剂的投加量减小。
Research is based on dyeing sludge, paper mill sludge, waterworks sludge, sewage sludge, and the tipical properties of sludges were explored. The suction and pressure filter experiments with different dosing of FeCl3 and PAM were carried out. The results shows that paper mill sludge is the highest(3.51 x109 s2/g), and filter cake water content is the lowest,respectively is 13.3 g/g dried mud and 79.6%, SRF decides the speed of dewatering, Bound water content and water content is negatively related. best FeCl3 dosing of sewage sludge, dyeing sludge, paper mill sludge respectively is 10%,9%,8%, the water content is 65.4%,60.9%,62.7%. best PAM dosing respectively is 0.2%,0.4%,0.3%, the water content is 63.1%,59.6%,62.1%. The water content of sewage sludge is the highest after the conditioning which indicates that pure biochemical sludge is generally difficult to dewatering. The water content of sewage sludge is down to 61.3% after Composite conditioned which indicates Composite conditioning is better and dosing decreases than single conditioning.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2014年第S1期184-188,共5页
Environmental Science & Technology
