超重力场协同絮凝处理腈纶废水的研究  

Study on the effect of supergravity field synergistic flocculation on the turbidity and COD of acrylic fiber wastewater

作　　者：潘帆 陈明功[1] 周鑫 赵彬彬 荣俊锋[1] 杨忠连[1] PAN Fan;CHEN Minggong;ZHOU Xin;ZHAO Binbin;RONG Junfeng;YANG Zhonglian(School of Chemical and Blasting Engineering,Anhui University of Science&Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学化工与爆破学院,安徽淮南232001

出　　处：《应用化工》2024年第11期2582-2588,共7页Applied Chemical Industry

基　　金：安徽省重点研究与开发计划(201904a07020085)。

摘　　要：腈纶废水中具有高浓度悬浮颗粒,具有较高的浊度和化学需氧量,传统絮凝沉淀法分离效率较低。采用高速离心机产生超重力场,协同絮凝方法处理腈纶废水,研究离心时间、转速和絮凝剂添加量等参数对腈纶废水浊度和COD去除率的影响。单因素研究发现,随絮凝剂浓度、离心时间和转速增加,浊度去除率增大,COD去除率先升后降出现峰值。多因素响应面研究发现,浊度去除率的影响顺序为絮凝剂浓度影响最大,转速次之,离心时间影响较小;COD去除率的影响顺序为转速影响最大,絮凝剂浓度次之,离心时间影响程度较小。最优工艺条件为:絮凝剂浓度0.27%、离心时间4.5 min、转速5000 r/min,得到浊度最大去除率为91.52%,COD最大去除率为53.83%。Acrylic wastewater is characterised by a high concentration of suspended particles,high turbidity and chemical oxygen demand.The separation efficiency of traditional flocculation and sedimentation methods is low in such cases.In order to treat acrylic wastewater,a method of synergistic flocculation with a supergravity field was employed.The effects of centrifugation time,rotational speed and flocculant addition on the turbidity and COD removal of acrylic wastewater were then investigated.The single-factor study revealed that the turbidity removal rate increased with the increase of flocculant concentration,centrifugation time and rotational speed,the COD removal rate peaked after the increase.Specifically,as the concentration of the flocculant was increased,the ability to remove turbidity improved,indicating that higher doses of flocculant enhance the aggregation of suspended particles,facilitating their separation.Similarly,extending the centrifugation time allowed more particles to settle out under the influence of centrifugal force,thereby improving turbidity removal.Additionally,increasing the rotational speed generated greater centrifugal force,further enhancing the efficiency of particle separation.The multifactorial response surface study demonstrated that the turbidity removal rate was influenced by flocculant concentration,followed by rotational speed and centrifugation time.The COD removal rate was influenced by rotational speed,followed by flocculant concentration and centrifugation time to a lesser extent.The optimal process conditions were identified as a flocculant concentration of 0.27%,a centrifugation time of 4.5 min,and a rotational speed of 5000 r/min,which resulted in the maximum removal rate of 91.52%for turbidity and 53.83%for COD.

关 键 词：腈纶废水 超重力场 絮凝剂 浊度 COD 

分 类 号：TQ09[化学工程] X703[环境科学与工程—环境工程]