摘要
利用人工培养的绿藻进行了高铁酸钾预氧化除藻的静态试验 ,并与单纯硫酸铝混凝除藻效果进行了对比。结果表明 ,腐殖酸的存在使单纯硫酸铝除藻效率降低 ,高铁酸钾预氧化可以大幅度降低腐殖酸对混凝除藻的影响 ,这也是高铁酸钾具有良好除藻作用的主要原因之一。为达到同样的除藻效果 ,预投高铁酸钾可以节省混凝剂用量。另外 ,适当地降低 pH值、延长预氧化时间将大大提高高铁酸钾预氧化除藻效率。
Jar test of pre-oxidation with potassium ferrate (Ⅵ) upon algae removal were conducted using laboratory cultured green-algae. A comparison of the effectiveness of algae removal was also made between pre-oxidation with potassium ferrate (Ⅵ) and coagulation-sedimentation with aluminum sulphate alone. Results showed that humic acid in the water caused the reduction of algae removal efficiency coagulated with aluminum sulphate alone. Pre-oxidation with potassium ferrate (Ⅵ) could reduce significantly the influence of humic acid on algae removal by coagulation, which was one of primary reason for the excellent effectiveness on algae removal by potassium ferrate (Ⅵ). To achieve certain algae removal, pretreatment with potassium ferrate (Ⅵ) could reduce the dosage of aluminum sulphate. In addition, under the condition of low pH value and a prolong pre-oxidation time, algae removal efficiency of pre-oxidation with potassium ferrate (Ⅵ) was further enhanced.
出处
《中国给水排水》
CAS
CSCD
北大核心
2000年第9期5-8,共4页
China Water & Wastewater
基金
国家杰出青年科学基金资助项目! (5982 51 0 6)
关键词
除藻
预氧化
腐殖酸
高铁酸钾
绿藻
自来水
algae removal
pre-oxidation
humic acid
pH
potassium ferrate (Ⅵ)
coagulation
