城镇污水厂污泥快速固化剂研究

发布时间：2018-08-18 17:00

【摘要】：针对城镇污水厂污泥固化处理周期长、效能低的问题,研发城镇污水厂污泥快速(3d)固化剂。考察了硫铝酸盐水泥、硅酸盐水泥、高锰酸钾、早强减水剂、粉煤灰、石灰等多种固化材料和添加剂对固化体强度的影响。结果表明,随着硫铝酸盐水泥、硅酸盐水泥、高锰酸钾、早强减水剂和粉煤灰掺入量的增加,3 d固化体抗压强度逐步提高,其影响顺序为:硫铝酸盐水泥硅酸盐水泥高锰酸钾早强减水剂粉煤灰;石灰对固化体强度影响显著;膨润土和石膏对增强固化体强度作用较小。快速固化剂组分及其配比为硫铝酸盐水泥(3.9%)、硅酸盐水泥(3%)、石灰(1.7%)、粉煤灰(6%),其3 d固化强度满足污泥填埋处置的要求。固化体浸出液中COD、氨氮浓度显著降低;SEM结果表明,固化污泥颗粒较脱水污泥具有孔隙率小、结构密实、含有大量颗粒状结晶的特点。
[Abstract]:In order to solve the problem of long solidification period and low efficiency of sludge solidification in urban wastewater treatment plant, a rapid (3 d) solidifying agent was developed. The effects of sulphoaluminate cement, Portland cement, potassium permanganate, early strength water reducer, fly ash, lime and other curing materials and additives on the strength of solidified body were investigated. The results show that the compressive strength of the solidified body increases gradually with the increase of the content of sulphoaluminate cement, Portland cement, potassium permanganate, early strength water reducer and fly ash. The order of influence is as follows: sulfite cement Portland cement potassium permanganate early strength reducer fly ash lime has a significant effect on the strength of solidified body bentonite and gypsum have little effect on strengthening the strength of solidified body. The rapid curing agent composition and its proportion are sulphoaluminate cement (3.9%), Portland cement (3%), lime (1.7%) and fly ash (6%). The SEM results showed that the solidified sludge particles had smaller porosity, denser structure and a large number of granular crystals than those of dewatered sludge.
【作者单位】：重庆大学三峡库区生态环境教育部重点实验室;
【基金】：国家水体污染控制与治理科技重大专项(2012ZX07307-002)
【分类号】：X703

【相似文献】