SONGXin,LIYan-jun,HUANGHui,et al.Control of Conventional and Emerging Contaminants by Ozone-Upflow Biological Activated Carbon Process[J].China Water & Wastewater,2024,40(3):1-8.
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Control of Conventional and Emerging Contaminants by Ozone-Upflow Biological Activated Carbon Process

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第3期 Page: 1-8 Column: Date of publication: 2024-02-01
Author(s):
SONG　Xin1;  LI　Yan-jun2;  HUANG　Hui1;  LIU　Fen-qiang1;  XU　Zhao1;  WANG　Yan-yi2;  YANG　Kai3;  ZHANG　Xi-hui2
（1. Shenzhen Shenshui Longhua Water Co. Ltd.， Shenzhen 518100， China； 2. Shenzhen International Graduate School， Tsinghua University， Shenzhen 518055， China； 3. Guangdong Guangye Equipment Manufacturing Group Co. Ltd.， Guangzhou 510275， China）
Keywords:
water treatment plant;  advanced treatment;  ozone-upflow biological activated carbon;  AOC;  odorous substances;  emerging contaminants
Abstract:
In order to understand the removal effect of advanced treatment processes on emerging pollutants and other trace pollutants, a one-year investigation and monitoring was conducted on the ozone-upflow biological activated carbon (O3-BAC) process of a advanced treatment water plant in Shenzhen City. The results indicated that the advanced treatment process could effectively remove conventional pollutants, with average concentrations of CODMn, TOC, and ammonia nitrogen in the effluent being 0.49 mg/L, 0.9 mg/L, and 0.014 mg/L, respectively. Fluorescent organic compounds were mainly removed by the advanced treatment process, with a removal rate of over 50%. The advanced treatment process could improve the removal rate of assimilable organic carbon (AOC) from 11.4% in conventional processes to 41.4%, but the AOC in the effluent did not meet the biological stability requirements during the monitoring period. After advanced treatment, the effluent concentrations of DMTS, 2-MIB and GSM met Shenzhen’s drinking water standard. The O3-BAC process demonstrated good removal efficiency for 37 PPCPs and 8 EDCs, with average removal rates of 85.9% and 80.4%, respectively. The advanced treatment process could effectively control the risk of emerging contaminants on human health, but the risk entropy value of estrone in the effluent was still much higher than the high-risk limit value (27.7 in winter and 169.6 in summer), which required special attention.
Last Update: 2024-02-01