摘要
实验利用阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)改性斜发沸石,并将其应用于剩余污泥的调理。以污泥比阻为参数,考察了表面活性剂浓度、反应温度及反应时间对CTAB改性沸石调理剩余污泥效果的影响。正交实验结果表明,改性沸石的最佳条件为CTAB浓度30 mmol/L,反应温度30℃,反应时间12 h。相较于原沸石,经改性沸石调理的污泥其脱水性能和沉降性能都有较大提高.当改性沸石投加量为90%(干污泥重)时,污泥净生产率达到最大值1.95 kg/(m^2·h),过滤时间缩短至最小值121 s,滤饼含水率也相应地由87.8%(原污泥)降低至59.5%。强化机理的研究表明,改性沸石主要是通过静电中和与吸附架桥作用,以及在污泥絮体中构建坚硬骨架来强化污泥调理效果的。
In this study,clinoptilolite was modified cationic surfactant cetyl trimethyl ammonium bromide（ CTAB） and its application to conditioning of waste activated sludge（ WAS） was investigated. rthogonal experiment sludge specific resistance（ SRF） as a parameter and surfactant concentration,reaction temperature,reaction time as variables was conducted to investigate the effect of CTABmodified clinoptilolite on conditioning of xperimental results showed that optimal conditions CTAB concentration of 30 mmol / L,reaction temperature of 30℃ and reaction time of 12 h. he dewatering performance and settling properties of WAS treated modified clinoptilolite were greatly enhanced when the modified clinoptilolite dosage was 90%（ dry sludge weight）,the net sludge solids yield reached maxim value（ 1. 95 kg /（ m^2·h）） and the time to filter minim（ 121 s）. ilter cake moisture also decreased from 87. 8% to 59. 5%. The enhanced conditioning of WAS by modified clinoptilolite mainly attributed to electrostatic neutralization adsorption bridging and a hard skeleton in sludge flocs.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第6期3193-3199,共7页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(51278175,51378188)
湖南省研究生科研创新项目(CX2014B140)
关键词
剩余污泥
可压缩性
污泥调理
改性沸石
骨架
waste activated sludge
compressibility
sludge conditioning
modified clinoptilolite
skeleton
