ZHANGXiao-hong,LAIHao-lin,ZHANGKe-jia,et al.Odor Compound Effect and Its Comprehensive Removal under the Condition of Multi-source Water Supply[J].China Water & Wastewater,2024,40(21):34-42.
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Odor Compound Effect and Its Comprehensive Removal under the Condition of Multi-source Water Supply

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第21期 Page: 34-42 Column: Date of publication: 2024-11-01
Author(s):
ZHANG　Xiao-hong1;  LAI　Hao-lin2; 3;  ZHANG　Ke-jia2; 3;  FU　Zhou-yue1;  WU　Xiao-gang2; 3
（1. Zhoushan Water Supply Co. Ltd.， Zhoushan 316021， China； 2. College of Civil Engineering and Architechture， Zhejiang University， Hangzhou 310058， China； 3. Zhejiang Key Laboratory of Drinking Water Safety and Distribution Technology， Hangzhou 310058， China）
Keywords:
multi-source water supply;  odor;  compound effect;  odorant removal capacity
Abstract:
The multi-source water supply is likely to increase the complexity of the odor issue in the water. To investigate the compound effect of various odors and the influence of their coexistence on the odor removal effect of the water treatment process under multi-source water supply condition, the flavor profile analysis (FPA) and gas chromatography-mass spectrometry (GC-MS) were employed for detection and analysis. There existed disparities in the form of compound effect among different odor types, namely, masking, coordination or coexistence, and the form of compound effect among odor types varied along with the alteration of odor intensity level. When the odor intensity level was low (FPA ranging from 2 to 6), earthy and fishy odor or earthy and grassy odor could coexist effortlessly, that was, both types of odors could be manifested simultaneously. When the odor intensity level was higher (FPA ranging from 8 to 10), both the fishy and grassy odor exerted a masking effect on the earthy odor. The coexistence of diverse odor substances influenced the removal capability of potassium permanganate. For the single substance solution and the mixed solution of 2-methylisonborneol (2-MIB), dimethyl trisulfide (DMTS) and β-cyclocitral with the total concentration of odor substances at 100 ng/L, the total removal efficiencies of odorants by potassium permanganate were 11.72%, 46.58%, 82.79% and 49.34%, respectively, which were associated with the molecular structure of odorants. The total removal efficiencies of odor substances in the aforementioned solution by powdered activated carbon (PAC) were 88.78%, 96.58%, 87.95%, and 91.71%, respectively. This indicated that the coexistence of various odor substances had a limited impact on the odorant removal capacity of PAC, which was mainly associated with the pore size and surface chemical properties of PAC.
Last Update: 2024-11-01