环境工程学报2019，Vol.13Issue(4)：977-983,7.DOI:10.12030/j.cjee.201811089
低温热水解对污泥触变性及脱水性能的影响
Effect of low-temperature thermal hydrolysis on sludge thixotropy and dewaterability
摘要
Abstract
When sludge was subjected to thermal hydrolysis, an irreversible change occurred on its rheological and physicochemical properties. To optimize the subsequent sludge treatment and disposal process, the effect of low-temperature thermal hydrolysis (60～90 ℃) on its thixotropy and dewaterability was systematically investigated when the thixotropic kinetic coefficient (K) and the total solids (TS) of the centrifugal dewatered cake were taken as the evaluation indicator of sludge thixotropy and dewaterability, respectively. Experimental results show that sludge thixotropy and dewaterability increased after 48 h thermal hydrolysis, the logarithmic increase correlations were observed between heating temperature and thixotropy or dewaterability. Moreover, sludge dewaterability increase due to thermal treatment was logarithmically proportional to its thixotropy increase. This indicates that K could become a reliable tool to compare sludge dewaterability, and provide a new method to evaluate sludge dewaterability from a rheological perspective.关键词
热水解/触变性/脱水性/污泥/温度Key words
thermal hydrolysis/thixotropy/dewaterability/sludge/temperature分类
资源环境引用本文复制引用
曹秀芹,柳婷,江坤,仇付国,付昆明,刘建伟..低温热水解对污泥触变性及脱水性能的影响[J].环境工程学报,2019,13(4):977-983,7.基金项目
北京市自然科学基金资助项目(KZ201310016017) （KZ201310016017）
北京建筑大学市属高校基本科研业务费专项资金资助(X18182) （X18182）
