CAJ | 학술논문

采用聚合氯化铝（PAC）、聚合氯化铝铁（PAFC）两种混凝剂对模拟城市雨水进行混凝试验研究，考察了混凝剂种类、投加量及原水 pH 等因素对混凝效果的影响．结果表明：混合搅拌强度200 r／min 快速搅拌1 min，150 r／min 中速搅拌5 min，50 r／min 慢速搅拌15 min 的条件下，PAC 和 PAFC 的最佳投加量分别为40 mg·L-1、60 mg ·L-1，两种混凝剂的混凝效果相当，无明显差别．考虑成本核算，选用 PAC 作为混凝药剂．在原水 pH 值为6．5～7．5的范围内 PAC 的混凝性能较好．在其投加量为40 mg·L-1，原水 pH 为7．0的条件下，除浊率可达98％，除氨氮率为18％，CODcr 的去除率达到47％．
채용취합록화려（PAC）、취합록화려철（PAFC）량충혼응제대모의성시우수진행혼응시험연구，고찰료혼응제충류、투가량급원수 pH 등인소대혼응효과적영향．결과표명：혼합교반강도200 r／min 쾌속교반1 min，150 r／min 중속교반5 min，50 r／min 만속교반15 min 적조건하，PAC 화 PAFC 적최가투가량분별위40 mg·L-1、60 mg ·L-1，량충혼응제적혼응효과상당，무명현차별．고필성본핵산，선용 PAC 작위혼응약제．재원수 pH 치위6．5～7．5적범위내 PAC 적혼응성능교호．재기투가량위40 mg·L-1，원수 pH 위7．0적조건하，제탁솔가체98％，제안담솔위18％，CODcr 적거제솔체도47％．
The coagulation tests for simulated urban rainwater were performed using PAC and PAFC respectively.The influences of coagulant type,dosage and pH of raw water on the coagula-tion effect were investigated.The results show that under the conditions of the fast stirring rate of 200 r/min(1 minute),the middle stirring rate of 150 r/min(5 minutes),low stirring rate of 50 r/min(15 minutes),the optimum dosage of PAC is 40 mg·L-1 ,the optimum dosage of PAFC is 60 mg·L-1 .There is no significant difference in coagulation effect between PAC and PAFC.Taking cost into account,PAC is recommended.When the pH ranges from 6.5 to 7.5,the coagulation ef-ficiency of PAC is better.When PAC dosage is 40 mg·L-1 and pH of raw water is 7.0,the re-moval rate of turbidity,ammonia nitrogen and CODcr is 98.14%,18.05% and 47.46%,respec-tively.