热水解预处理改善污泥脱水性能的实验研究  

Study on the Improvement of Sludge Dewatering Ability by Thermal Hydrolysis Pre-treatment

作　　者：杜元元[1] 张雷[1] 汪恂[1] 晏发春 

机构地区：[1]武汉科技大学,武汉430065

出　　处：《工业安全与环保》2017年第5期27-29,共3页Industrial Safety and Environmental Protection

摘　　要：采用脱水污泥为材料,从热水解的原理出发,研究了不同的水热时间、温度、加碱量对污泥脱水性能的影响,并用Zeta电位、SEM、UV-Vis对污泥进行表征。实验结果表明,含水率85%的污泥,在120℃条件下热水解30 min,污泥的离心干基含水率从4.09降到了3.85;当投加碱(m(CaX_2)/m(VS)=0.08)时,污泥的离心干基含水率下降明显,在160℃条件下热水解40 min,污泥离心干基含水率下降幅度达到9.4%和7.9%。In this experiment, the sludge was used as the study material, according to the principle of the thermal hydroly- sis, the effects of hydro - thermal treatment time, temperature and alkali dosage on the sludge dewatering ability was investi- gated and meanwhile the sludge was characterized by Zeta potential, SEM and UV- Vis. The experimental results showed that, for the sludge with 85 % of moisture content, the centrifugal dry basis moisture content decreased from 4.09 to 3.85 after treated at 120 ℃ for 30 minutes, and when adding certain alkali （m（CaX2）/m（VS） = 0.08） in the sludge, the cen- trifugal dry basis moisture content decreased obviously by 9.4% and 7.9% after treated at 160℃ for 40 minutes.

关 键 词：污泥 热水解预处理 脱水性能 

分 类 号：X703[环境科学与工程—环境工程]