RANGang,XIEKang,ZHAOXiao-yong,et al.Comprehensive Evaluation of Manganese Ion Removal from Water in the Whole Process of Water Purification Plant[J].China Water & Wastewater,2022,38(23):43-48.
净水厂全流程工艺去除水中锰离子的综合评价
- Title:
- Comprehensive Evaluation of Manganese Ion Removal from Water in the Whole Process of Water Purification Plant
- Keywords:
- water purification plant; the whole process; manganese removal; quartz sand; pre-oxidation; coagulation
- 摘要:
- 针对净水厂进水锰离子浓度偏高问题，通过实际运行数据分析了全流程工艺的除锰效果。结果显示，当预氧化混凝阶段氧化剂投加量为7 mg/L、混凝剂投加量为22 mg/L时，在2020年进水锰离子浓度较高条件下，对锰离子的平均去除率为45%，但出水锰离子浓度仍高达0.07 mg/L；石英砂过滤阶段的工艺运行参数与国家推荐的经验值和理论值较为接近。实际处理效果表明，当进水锰离子浓度为0.093 mg/L时，去除率为85.4%；当进水锰离子浓度为0.172 mg/L时，净水厂全流程工艺对锰离子的去除率最高为93.03%。
- Abstract:
- To solve the problem of high manganese ion concentration in the influent of water purification plants, the performance of manganese removal in the whole process was analyzed by actual operation data. When the oxidant and coagulant dosages were 7 mg/L and 22 mg/L in the pre-oxidation coagulation stage, the average removal rate of manganese ion was 45% under the condition of high manganese ion concentration in influent in 2020. However, the manganese ion concentration in effluent was still as high as 0.07 mg/L. The operating parameters of quartz sand filtration were close to the empirical and theoretical values recommended by the nation. When the influent manganese ion concentration was 0.093 mg/L, its actual removal rate was still as high as 85.4%. The highest removal rate of manganese ion of 93.03% in the whole process of the water purification plant was obtained when the influent manganese ion concentration was 0.172 mg/L.
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