循环造粒流化床去除不同特性有机物的效果及强化  

Removal Efficiency and Enhancement of Various Organic Matters in a Circulating Granulation Fluidized Bed System

作　　者：徐嘉琪 黄廷林[1,2] 文刚 邢翔轩[1,2] 许钰琪 XU Jia-qi;HUANG Ting-lin;WEN Gang;XING Xiang-xuan;XU Yu-qi(Northwest China Key Laboratory of Water Resources and Environment Ecology,Xi’an University of Architecture and Technology,Xi’an 710055,China;Shaanxi Key Laboratory of Environmental Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学西北水资源与环境生态教育部重点实验室,陕西西安710055 [2]西安建筑科技大学陕西省环境工程重点实验室,陕西西安710055

出　　处：《中国给水排水》2025年第3期58-64,共7页China Water & Wastewater

基　　金：陕西省重点研发计划创新链项目(2020ZDLSF06-05);国家重点研发计划项目(2019YFD1100102-04)。

摘　　要：循环造粒流化床作为一种新型高效固液分离技术,前期研究表明,其对不同水质水体的浊度均具有良好的去除效果,为此,进一步考察了其对不同特性有机物的去除效果,并将其与预氯化结合以探究对有机物的强化去除效果。结果表明,流化床系统对腐殖酸的去除效果明显好于富里酸,对腐殖酸的UV_(254)、COD_(Mn)、DOC去除率分别达到89.11%、74.55%、60.29%,而对富里酸的相应指标去除率分别为44.60%、5.74%、17.16%。与传统混凝沉淀工艺相比,循环造粒流化床对UV_(254)、COD_(Mn)和DOC的去除率分别可提高1%~13%、4%~18%、1%~25%,这是因为循环造粒流化床去除有机物的途径不仅包括混凝作用,还包括结团絮体的表面吸附和截留作用。采用预氯化进行强化后,循环造粒流化床对UV_(254)、COD_(Mn)和DOC的去除率分别可提升4.65%~29.10%、4.15%~58.59%和4%~10%,这是因为次氯酸钠破坏了包裹在颗粒外面的有机物,利于颗粒沉降,提升悬浮层性能。As an innovative high-efficiency solid-liquid separation technology,the circulating granulation fluidized bed has demonstrated significant efficacy in removing turbidity across various water qualities.Consequently,this study further examined its removal performance on different types of organic matter and investigated the enhanced removal efficiency when combined with pre-chlorination.The removal efficiency of humic acid in the fluidized bed system was significantly superior to that of fulvic acid.The removal efficiencies of humic acid in terms of UV_(254),COD_(Mn) and DOC were 89.11%,74.55% and 60.29%,respectively,whereas those for fulvic acid were 44.60%,5.74% and 17.16%,respectively.Compared to the conventional coagulation and sedimentation process,the removal efficiencies of UV_(254),COD_(Mn),and DOC could be enhanced by 1% to 13%,4% to 18%,and 1% to 25%,respectively.This improvement was attributed to the fact that the removal pathway of organic matters in the circulating granulation fluidized bed included not only coagulation but also surface adsorption and interception of the flocs.After implementing pre-chlorination,the removal efficiencies of UV_(254),COD_(Mn),and DOC could be enhanced by 4.65% to 29.10%,4.15% to 58.59%,and 4% to 10%,respectively.This improvement was attributed to sodium hypochlorite’s ability to disrupt the organic matters surrounding particles,thereby facilitating particle settling and enhancing the performance of the suspension layer.

关 键 词：循环造粒流化床 有机物 腐殖酸 富里酸 预氯化 

分 类 号：TU991[建筑科学—市政工程]