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本文研究了饮水除氟及含氟废水处理新工艺。用0.1M硫酸注入原水使其pH由8.4降至6.0～6.5,再通过一个充填粒径为0.45～1.2或2mm的活性氧化铝滤罐。出水的平均氟化物水平均0.5mg/L,但这种水可与适当体积的原水混合,使供饮用的处理水氟化物水平调整到0.90～0.95mg/L。本工艺使滤料的除氟容量由通常可接受的1.2提高到4.5mg F~-/g Al_2O_3以上。每立米水处理费(包括化学品、滤料补充、电力和人工)为0.10元,与传统工艺(不调原水pH的为0.29元/m~3处理水)相比,节省了66％。活性氧化铝再生用0.80～0.85％氢氧化钠溶液使滤料的溶解降到最低程度,强碱性含氟废水经中和及化学沉淀后得到了处理。
This paper studies the drinking water fluoride removal and fluorine-containing wastewater treatment process. The injection of raw water with 0.1 M sulfuric acid reduced the pH from 8.4 to 6.0-6.5 and then passed through an activated alumina canister filled with 0.45-1.2 or 2 mm particles. The average fluoride level in the effluent was 0.5 mg / L, but this water could be mixed with a suitable volume of raw water to adjust the level of fluoride in the treated effluent to 0.90 to 0.95 mg / L. The process allows the fluoride removal capacity of the filter material from the generally acceptable 1.2 to 4.5mg F ~ - / g Al 2 O 3 or more. The water treatment fee (including chemicals, filter replenishment, electricity and labor) per cubic meter was 0.10 yuan per meter, which was 66% less than that of the traditional process (0.29 yuan / m3 of treated water without adjusting the raw water pH). Regeneration of activated alumina with 0.80 ~ 0.85% sodium hydroxide solution to minimize the dissolution of the filter, strong alkaline fluorine-containing wastewater after neutralization and chemical precipitation has been treated.