摘要
研究了H2O2预氧化复合高岭土混凝工艺对水中颤藻的去除效果。结果表明,H2O2具有显著氧化抑制藻活性的功能,高岭土则具有良好的助凝作用,经H2O2预氧化复合高岭土混凝后形成的絮体大而密实,沉降速度更快。试验得出最佳复配条件为:原水pH值为7,预氧化时间为20 min,H2O2、高岭土和PAC的投加量分别为3,34和3.5 mg/L。在该最佳试验条件下,浊度和叶绿素a去除率分别达到95.6%和97.8%,残留铝含量为0.13 mg/L。
Coagulation removal of Oscillatoria tenuis by kaolin and polyaluminium chlorate （PAC） pre-oxidized with hydrogen peroxide was investigated. The result showed that hydrogen peroxide played an important role in markedly oxidizing and restraining the cytoactive of algae, while the kaolin had satisfied effect of coagulant aid. The flocs were bigger and tighter after hydrogen peroxide pre-oxidation, and the settling rate was also improved. The optimum coagulation conditions were： 20 min pre-oxidation time, 3 mg/L hydrogen peroxide, 34 mg/L kaolin, 3.5 mg/L PAC, and a pH of 7 in the sample water. Under the optimal experimental conditions, the removal rate of turbidity and chlorophyll a were reached 95.6% and 97.8% respectively, and the concentration of residual aluminum was 0.13 mg/L.
出处
《供水技术》
2010年第1期17-20,共4页
Water Technology
基金
青岛市科技计划项目(06-2-2-20-jch)
关键词
H2O2
预氧化
高岭土
颤藻
絮凝
浊度
叶绿素A
hydrogen peroxide
pre-oxidation
kaolin
Oscillatoria tenuis
flocculation
turbidity
chlorophyll a
