LIXu-feng,ZHOUYao,CHANGJing,et al.Enhanced Purification Process of a Waterworks in Tianjin by Pretreatment and Advanced Treatment Technology[J].China Water & Wastewater,2024,40(3):46-52.
预处理及深度处理技术强化天津某水厂净水工艺
- Title:
- Enhanced Purification Process of a Waterworks in Tianjin by Pretreatment and Advanced Treatment Technology
- 摘要:
- 滦河水质季节波动较大，仅采用“混凝-沉淀-过滤-消毒”的常规工艺处理，冬季运行压力较大。以引滦原水为研究对象，采用臭氧预氧化、臭氧深度氧化、活性炭过滤、臭氧/活性炭组合处理等技术对常规工艺进行强化，考察各工艺对浊度、CODMn、UV254等指标的控制能力。结果表明：若要求出水CODMn低于1.0 mg/L，采用1.0 mg/L的后臭氧强化工艺即可实现；若对CODMn的控制要求达到0.85 mg/L，应选用1.0 mg/L的预臭氧强化工艺，但此工艺对UV254的控制能力较后臭氧弱；对浊度而言，活性炭过滤的效果优于两种臭氧强化工艺，炭滤池出水浊度可降至0.12 NTU；最优的出水效果来自1.0 mg/L后臭氧/活性炭组合强化工艺，浊度可降至0.10 NTU以下，CODMn和UV254分别降至0.50 mg/L和0.043 cm-1，可为饮用水厂的提标改造提供技术参考。
- Abstract:
- The water quality of Luanhe River fluctuates greatly in seasons, and the treatment performance is poor when there is only the conventional process consisting of coagulation, sedimentation, filtration and disinfection. The conventional process for the treatment of raw water from Luanhe River was enhanced by techniques such as pre-ozonation, advanced ozonation, activated carbon filtration and combined treatment of ozonation and activated carbon, and the ability of each process to control turbidity, CODMn, UV254 and other indicators was investigated. The post-ozonation enhanced process with ozone concentration of 1.0 mg/L could realize the CODMn in effluent less than 1.0 mg/L. The pre-ozonation enhanced process with ozone concentration of 1.0 mg/L should be selected when the CODMn in effluent was required to be less than 0.85 mg/L. However, the process demonstrated a weaker ability for UV254 control compared with post-ozonation. For turbidity control, the performance of activated carbon filtration was better than that of the two ozonation enhanced processes, and the turbidity of the effluent from the carbon filter was decreased to 0.12 NTU. The combined post-ozonation and activated carbon enhanced process with ozone concentration of 1.0 mg/L had the best effluent quality, and the turbidity, CODMn and UV254 were less than 0.10 NTU, 0.50 mg/L and 0.043 cm-1, respectively, indicating that the results could provide technical reference for the upgrading of drinking water plants.
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