摘要
以污泥滤饼含水率和比阻(SRF)作为评价指标,改变石灰与PAM的添加顺序及投加比例,研究石灰、PAM及石灰与PAM联合调理对污泥脱水性能的影响.实验结果表明,石灰与PAM有效降低了SRF和滤饼含水率,联合调理能改善污泥脱水性能,且PAM与石灰的投加顺序对改善污泥的脱水性能影响不大.单独投加石灰的最佳投药量为0.25g/100mL,污泥比阻由原泥的6.43×1013 m/kg下降到1.85×1013 m/kg,石灰投加量为2.0g/100mL时,离心和抽滤后泥饼含水率由原泥的97.5%分别降低到80.4%和57.8%;先投加100mg/L的PAM后投加2g/100mL的石灰,污泥比阻由原泥的6.43×1013 m/kg下降到0.65×1013m/kg,离心和抽滤后泥饼含水率由原泥的97.5%分别降低到81.8%和57.7%.
The paper studied the effect of lime,flocculants PAM and lime combined with PAM on the dewaterability of sewage under the conditions of changing the sequence and proportion of lime and PAM,using some evalution indexes,i.e.,water content of dewatered sludge and specific resistance of filtration（SRF）.The results show that adding flocculants PAM or lime can reduce SRF and water content of dewatered sludge,lime combined with PAM can improve sludge dewatering properties,but the sequence of lime and PAM has little effect on improving sludge dewatering performance.When conditioning sludge by lime individually,the best addition amount was 0.25g/100 mL,the SRF is reduced from 6.43×1013 m/kg to 1.85×1013 m/kg.when the addition amount of lime was 2g/100 mL,the water content in dewatered sludge by the centrifuge and the suction filter are reduced from 97.5% to 80.4%,57.8%,respectively.When conditioning sludge by lime combined with flocculants PAM and adding 100mg/L PAM before the addition of 2g/100 mL lime,the SRF is reduced from 6.43×1013 m/kg to 0.65×1013 m/kg,and the water content in sludge dewatered by the centrifuge and the suction filter are reduced from 97.5%to 81.8%,57.7%,respectively.
出处
《陕西科技大学学报（自然科学版）》
2015年第4期23-27,36,共6页
Journal of Shaanxi University of Science & Technology
基金
国家自然科学基金项目(21347004)
