基于响应面法的烟草薄片废水絮凝气浮预处理的优化
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摘要
以阳离子聚丙烯酰胺(CPAM)为助凝剂,聚合硫酸铁(PFS)为絮凝剂,制备PFS-CPAM复合混凝剂,用扫描电镜对产物的结构进行表征。探究废水温度、pH值,絮凝剂、助凝剂类型和用量等单因素对废水絮凝工艺的影响。在此基础上根据Box-Behnken试验设计原理,采用Design-Expert10.0软件建立COD去除率的二次响应曲面数值模型,并对模型进行分析得出,当pH为6.8,PFS用量为485.5 mg·L~(-1)、CPAM用量为4.8 mg·L~(-1)时,COD_(Cr)去除率最高,为64.13%。验证试验结果表明,偏差为0.23%,响应面法的预测值与实际值吻合较好,是一种优化薄片废水絮凝预处理的有效方法。
The experiment used cationic polyacrylamide(CPAM)as coagulant and polyferric sulfate(PFS)as flocculants to prepare PFS-CPAM composite coagulant.The structure of the product was characterized by scanning electron microscopy.Exploring the effects of wastewater temperature,pH value,flocculant,coagulant type and dosage on the flocculation process of wastewater.Based on the Box-Behnken experimental design principle,the secondary corresponding surface numerical model of COD removal rate was established by Design-Expert 10.0 software,and the model was analyzed.When the pH was 6.8,the PFS dosage was 485.5mg·L~(-1),and the CPAM dosage was 4.8 mg·L~(-1),the COD_(Cr) removal rate was the highest,which was 64.13%.The verification test results show that the deviation is 0.23%,and the predicted value of the response surface method is in good agreement with the actual value.It is an effective method to optimize the flocculation pretreatment of flake wastewater.
The experiment used cationic polyacrylamide(CPAM)as coagulant and polyferric sulfate(PFS)as flocculants to prepare PFS-CPAM composite coagulant.The structure of the product was characterized by scanning electron microscopy.Exploring the effects of wastewater temperature,pH value,flocculant,coagulant type and dosage on the flocculation process of wastewater.Based on the Box-Behnken experimental design principle,the secondary corresponding surface numerical model of COD removal rate was established by Design-Expert 10.0 software,and the model was analyzed.When the pH was 6.8,the PFS dosage was 485.5mg·L~(-1),and the CPAM dosage was 4.8 mg·L~(-1),the COD_(Cr) removal rate was the highest,which was 64.13%.The verification test results show that the deviation is 0.23%,and the predicted value of the response surface method is in good agreement with the actual value.It is an effective method to optimize the flocculation pretreatment of flake wastewater.
引文
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[2]曹恩豪,李军,胡劲,等.造纸法再造烟叶废水处理与回用技术研究进展[J].中国造纸,2016,35(7):75-82.
[3]陈荣.造纸法烟草薄片生产废水的处理[J].环境科学导刊,2010,29(1):68-70.
[4]侯轶,李友明,郑振山.造纸法烟草薄片废水中污染物的分析[J].华南理工大学学报,2008,36(3):95-98.
[5]陈赛艳,李友明,雷利荣.造纸法再造烟叶废水的臭氧氧化法预处理[J].烟草科技,2014(12):27-31.
[6]陈正春,李军,冯文超.造纸法再造烟叶废水的处理[J].云南化工,2014,41(4):26-28.
[7]王海涛,刘海滨,崔志强.絮凝沉淀法深度处理造纸废水的研究[J].污染防治技术,2012(4):49-52.
[8]田超男,李杰,王亚娥.浅层气浮及其在水处理中的应用[J].工业用水与废水,2013,44(2):33-35.
[9]张国钟.响应面法应用于臭氧深度处理制药废水优化研究[J].给水排水,2013,39(11):141-145.
[10]张辉,刘晋高,张会琴,等.响应面法优化Fenton氧化法处理造纸废水的研究[J].安徽化工,2015,43(17):90-97.
[11]赵登,张安龙,罗清,等.Fenton-絮凝工艺深度处理造纸废水[J].纸和造纸,2013,32(3):58-61.
[12]张树林,翁建男,陈思文.响应面法优化酵母菌处理餐饮废水[J].环境工程学报,2015,9(7):3142-3146.
[13]邓晨,何群彪,庞子山,等.响应面法优化油田含聚污水混凝工艺[J].广东化工,2016,43(4):1-4.
[14]Razali M A A,Ahmad Z,Ahmad M S B.Treatment of pulp and paper mill wastewater with various molecular weight of poly induced flocculation[J].Chemical Engineering Journal,2011,166(2):529-535.
[15]汤鸿霄.无机高分子絮凝理论与絮凝剂[M].北京:中国建筑工业出版社,2010.
[16]吴欢,沈一丁,李培枝,等.CPAM絮凝剂的双水相制备及其性能表征[J].纸和造纸,2013,32(6):54-58.
[17]郑蓓,葛小鹏,李涛,等.微絮凝强化过滤工艺处理低温低浊水的实验研究[J].环境科学学报,2010,30(11):2184-2188.
[18]李运涛,白文,李林林.聚合硫酸铝钒的制备及其对铜镍废水处理的影响[J].电镀与精饰,2018(1):42-46.
[19]骆丽君.聚合硫酸铁和PAM复合絮凝剂处理造纸废水的研究[J].安徽化工,2005,3(1):54-56.
[20]Liang Z,Wang Y,Zhou Y,et al.Variables affecting melanoidins removal from molasses wastewater by coagulation/flocculation[J].Sep.Purif.Technol.,2009,68(3):382-389.
[21]张程琛,李柏林,姚亚,等.酸-碱改性粉煤灰基铝铁复合混凝剂的除磷机理[J].环境科学与技术,2017(9):28-32.