钛白废水处理研究  

Research on the treatment of titanium dioxide wastewater

作　　者：赵小红[1] 梁柏林[1] 

机构地区：[1]贺州学院化学与生物工程系,广西贺州542899

出　　处：《工业水处理》2012年第6期63-65,共3页Industrial Water Treatment

基　　金：贺州市科学研究与技术开发计划项目(070403G)

摘　　要：以造纸白泥和石灰为中和剂,采用两段中和+曝气沉淀工艺处理钛白废水,考察了中和过程中的时间、温度、中和剂投加量及曝气时间对水质的影响。较佳工艺条件为第一阶段投料比m(废水)∶m(造纸白泥)=1 000∶13.6,常温中和15 min,此时废水pH为5.61,第二阶段m(废水)∶m(石灰)=1 000∶1.4,常温中和5 min,曝气30 min后静置5 min,废水pH为7.25,Fe2+质量分数<0.1%,出水达到《国家污水综合排放标准》GB 8978—2002的二级排放要求。Paper-making white clay and lime being used as neutralizer,the two-step neutralization ＋aerationsedimentation process has been used for treating titanium dioxide wastewater. The effects, such as the neutralizationtime, temperature, dosage of neutralizing agent, and aeration time on water quality are investigated. Better technicalconditions are as follow ： the dosage ratio in the first step, m （water） ：m （white clay） = 1 000：13.6, neutralizing 15 minat room tempreture,at this time the wastewater pH is 5.61. In the secend step,m （water）：m （lime）=1 000：1.4,neutralizing 5 min at room tempreture, 30 min aeration and 5 min standing, at this time, the effluent pH is 7.25, andFe2＋ mass fraction〈0.l%. The effluent can meet the second class requirements of the ＂National Integrated Waste-water Discharge Standard＂ （GB 8978-2002）.

关 键 词：水处理 钛白废水 造纸白泥 

分 类 号：X703.1[环境科学与工程—环境工程]