XUJia-qi,HUANGTing-lin,WENGang,et al.Removal Efficiency and Enhancement of Various Organic Matters in a Circulating Granulation Fluidized Bed System[J].China Water & Wastewater,2025,41(3):58-64.
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Removal Efficiency and Enhancement of Various Organic Matters in a Circulating Granulation Fluidized Bed System

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第41卷 Number: 第3期 Page: 58-64 Column: Date of publication: 2025-02-01
Author(s):
XU　Jia-qi1; 2;  HUANG　Ting-lin1; 2;  WEN　Gang1; 2;  XING　Xiang-xuan1; 2;  XU　Yu-qi1; 2
（1. Northwest China Key Laboratory of Water Resources and Environment Ecology， Xi’an University of Architecture and Technology， Xi’an 710055， China； 2. Shaanxi Key Laboratory of Environmental Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China）
Keywords:
circulating granulation-fluidized bed;  organic matter;  humic acid;  fulvic acid;  pre?chlorination
Abstract:
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 UV254, CODMn 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 UV254, CODMn, 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 UV254, CODMn, 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.
Last Update: 2025-02-01