[1]彭赵旭,姜 昆,娄天宇,等.基于响应面法优化混凝效果及其机理研究[J].郑州大学学报(工学版),2022,43(04):92-96.
 Study on the Optimization of Coagulation Effect and Mechanism by Response Surface Methodology[J].Journal of Zhengzhou University (Engineering Science),2022,43(04):92-96.
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基于响应面法优化混凝效果及其机理研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
43
期数:
2022年04期
页码:
92-96
栏目:
出版日期:
2022-07-03

文章信息/Info

Title:
Study on the Optimization of Coagulation Effect and Mechanism by Response Surface Methodology
作者:
彭赵旭 姜 昆 娄天宇 牛宁琪 王 炬 李 磊
文献标志码:
A
摘要:
为了考察 pH 值、混凝剂与助凝剂投量、搅拌强度和絮凝时间等因素对混凝过程的综合影响,以硫酸铝作为混凝剂,PAM 作为助凝剂对高岭土原水进行处理,以浊度、絮体平均粒径及分形维度作为响应值,采用响应面法对混凝条件进行优化并对混凝机理进行分析,最终建立了包括所有参数在内的回归 模型方程。 结果表明,当原水浊度为 95. 47 NTU 时,在 pH 值为 8. 00、硫酸铝投量为 21. 47 mg / L、PAM 投量为 5. 75 mg / L,搅拌强度为 31. 41 r / min,絮凝时间为 19. 37 min 条件下,浊度去除率为 87. 42% ,混凝效果极好。 对建立的回归模型方程进行求导分析,得到不同因素对混凝效果的影响权重,发现投药量( 助凝剂、混凝剂) 和 pH 值对混凝效果的影响最为显著,对絮体的形态结构起决定作用;搅拌强度、絮凝时间等工况影响絮体形成速率和最终形态,对混凝效果影响较小。 在最优条件下进行 3 组平行实验,实际浊度与预测值的相对误差为 2. 66% ,表明该模型对实际工程中优化工况以强化混凝效果具有指导作用
Abstract:
In order to investigate the comprehensive effects of pH value, coagulant and coagulant aid dosage, stirring strength, and flocculation time on the coagulation process, aluminum sulfate was used as coagulant and PAM as coagulant aid to treat kaolin raw water. Turbidity, average particle size and dimension of flocs were used as response values. The response surface method was used to optimize the coagulation conditions and an- alyze the coagulation mechanism. Finally, the regression model equation including all parameters was estab- lished. The results showed that when the turbidity of raw water was 95. 47 NTU, the turbidity removal rate was 87. 42% under the conditions of pH value of 8. 00, aluminum sulfate dosage of 21. 47 mg / L, PAM dosage of 5. 75 mg / L, stirring intensity of 31. 41 r / min and flocculation time of 19. 37 min. It is found that the dosage ( coagulant and coagulant aid) and pH value had the most significant influence on the coagulation effect, and played a decisive role in the morphology and structure of flocs. The stirring strength and flocculation time af- fected the formation rate and final morphology of flocs, whose influence was less than the former. Three paral- lel experiments were carried out under the optimal conditions, and the relative error between the actual turbidi- ty and the predicted value is 2. 66%, which indicated that the model had guiding significance for optimizing the working conditions and enhancing the coagulation effect in practical engineering.
更新日期/Last Update: 2022-07-03