摘要
针对黄河下游地区鹊山引黄水库水典型的低浊高藻水质特征,利用溶气型气浮实验装置,采用混凝—气浮工艺处理低浊高藻原水,对混凝—气浮工艺的主要影响因素进行试验分析,确定了工艺最佳运行参数,对不同分子量区间有机物的去除效果进行了比较。结果表明：在原水浊度为13-22NTU,藻类为（2.65-5.55）×10^7cells/L条件下,选择PAFC为混凝剂、投药量5mg/L（以Al^3＋计）、一级絮凝速度梯度G值为63（s^-1）（4min）、二级絮凝速度梯度G值为22（s^-1）（4min）、溶气水回流比为12%、静置时间为5min时,混凝—气浮工艺运行效果最优,对藻类、浊度、高锰酸盐指数（CODMn）、UV254、溶解性有机碳（DOC）的平均去除率分别为93.7%、95.6%、43.0%、52.3%和38.2%,混凝—气浮工艺对低浊高藻水库水浊度、藻类去除效果显著。
According to the typical characteristics of low turbidity and high algae Queshan reservior water in the downstream areas of the Yellow River,a dissolved air flotation experimental device was introduced,by the Coagulation-Flotation Process. The main factors of Coagulation / Floataion Process were analyzed by the experiment,and then the optimum operating parameters of the process were determined. Meanwhile the organics removal of different ranges of molecular weight was analyzed in the end. The results demenstrat that when the raw water which tuibidity is 13- 22 NTU,algal concentration is（ 2. 65- 5. 55） × 10^7 cells/L,the pollutant removal of flotation is best when the dosage of PAFC which is chosen as the best flocculant is 5mg / L（ Al3 ＋in total）,the first coagulation intensity（ G1） is 63（ s^- 1）（ operating 4min）,the secomd coagulation intensity（ G2） is 22（ s^- 1）（ operating 4min）,the dissolved air flotation recycle ratio is 12%,and the standing time is 5 min.And the average removal efficiency of algae,turbidity,CODMn,UV254 and DOC has achieved 93.7%,95. 6%,43. 0%,52. 3% and 38. 2%,respectively. And the removal effect of turbidity and algae for low turbidity and high algae reservoir water is significant.
出处
《山东建筑大学学报》
2015年第1期41-46,共6页
Journal of Shandong Jianzhu University
基金
国家水体污染控制与治理科技重大专项项目(2012ZX07404-003)
住房和城乡建设部科学技术项目(2014-k5-026)
山东省住房和城乡建设厅科技项目(KY022)
关键词
混凝-气浮工艺
低浊
高藻
因素分析
参数优化
Coagulation-Flotation Process
low turbidity
high algae
factor analysis
parameter optimization
作者简介
贾伟建（1991-），男，在读硕士，主要从事水处理理论与技术方面的研究．E-mail：596682460@qq．com
通讯作者：张克峰（1964-），男，教授，博士，主要从事水处理理论与技术方面的研究．Email：kfz@sdjzu．edu．cn
