摘要
利用水泥基和电厂废弃脱硫石膏研制适用于新疆地区经济高效污泥固化剂,采用单因素多水平和响应面分析的方法研究硅酸盐水泥、脱硫石膏、粉煤灰、过硫酸钾(KPS)的掺比和固化时间对污泥固化体无侧限抗压强度的影响,运用Design-expert优化污泥固化体的无侧限抗压强度,并利用扫描电镜分析污泥固化体的微观结构。实验表明:水泥基和电厂废弃的脱硫石膏能够有效改善污泥固化体的抗压强度;当工程应用中,需要抗压强度最佳时的掺比为m(污泥)∶m(水泥)∶m(脱硫石膏)∶m(粉煤灰)∶m(KPS)=100∶3∶1∶1∶0. 5、固化时间为3 d;而需要经济最优时的掺比为m(污泥)∶m(水泥)∶m(脱硫石膏)=100∶1∶1、固化时间为7 d,处理每吨污泥的药剂成本为5～6元。
In this paper,the cement-base and desulfurization gypsum discarded by power plants were used to develop sludge solidification agents suitable in Xinjiang,China. The effect of Portland cement,desulfurization gypsum,fly ash,potassium persulfate and curing time on unconfined compressive strength of solidified sludge were analyzed by means of single factor multi-level and response surface. The unconfined compressive strength of solidified sludge was optimized by means of Designexpert,and the microstructure of the solidified sludge was analyzed by means of scanning electron microscope. The experiment results showed that cement-base and desulfurization gypsum discarded by power plants could effectively improve unconfined compressive strength of the solidified sludge. When compressive strength was concentrated in real application,the mass ratio was sludge ∶ cement ∶ desulfurization gypsum ∶ fly ash ∶ potassium persulfate = 100 ∶ 3 ∶ 1 ∶ 1 ∶ 0. 5,and the curing time was 3 d;when economic benefit was focused,the mass ratio was sludge ∶ cement ∶ desulfurization gypsum = 100 ∶ 1 ∶ 1,and the curing time was 7 d,then the cost for reagents for per ton sludge was RMB 5 ~ 6.
作者
李诗尧
赵纯
孙志华
陈海婴
张森
李子晨
刘焕芳
LI Shi-yao;ZHAO Chun;SUN Zhi-hua;CHEN Hai-ying;ZHANG Sen;LI Zi-chen;LIU Huan-fang(College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi 832003 , China;Xinjiang Taiyuan Water Technology Sevice Co., Ltd , Shihezi 832000, China;Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400044, China;Zezhong Water Company of Shihezi City, Shihezi 832000, China)
出处
《环境工程》
CAS
CSCD
北大核心
2019年第3期146-151,共6页
Environmental Engineering
关键词
污泥固化
水泥基
脱硫石膏
无侧限抗压强度
新疆地区
sludge solidification
cement-base
desulfurization gypsum
unconfined compressive strength
Xinjiang
