摘要
正丁醛缩合生产辛烯醛过程所排出的废水中含有辛烯醛、丁酸钠及微量的各种醛和有机酸钠.生成的有机酸钠对设备造成腐蚀,废水直接排放也会给环境带来严重的污染.为使废水达到国家二级排放标准并且回收废水中的辛烯醛和丁酸钠,采用酸化-萃取-铁碳曝气-催化氧化-中和絮凝的工艺路线处理该缩合工段废水.实验证明当硫酸将废水的pH值酸化至2～3,萃取塔进出物料的体积比为2:1,理论塔板数为7,曝气时间为90 min,H2O2质量浓度为2mg/L,氧化时间为2 h时,所处理的废水的COD降为170mg/L,BOD5为45mg/L,pH值为7.5～8.5,并且回收了其中的辛烯醛和丁酸钠.
The wastewater from the condensed production of n-butyraldehyde includes sodium butyrate, octene aldehyde, few other aldehyde and organic acid sodium. The organic acid sodium generated will corrode the equipment and the wastewater will also pollute the environment. In order to recycle sodium butyrate and octane aldehyde in the wastewater to meet the requirement of national standard of grade 2 for discharge of sewage, souration-extraction-ferrum-carbon aeration-catalytic oxidation-neutralization flocculation and sedimentation technologic methods were used to treat the wastewater. It is proved that when the value of wastewater's pH is acidified to 2-3 by sulphuric acid, volume ratio of the materiel in and out of extraction column is 2:1, theoretical plate number is 7, aeration time is 90 min, mass concentration of H2O2 is 2 mg/L and oxidation time is 2 h, the COD, BOD5 and pH value of wastewater treated drops to 170, 45 mg/L and 7.5-8.5 respectively. In the meantime, the available constituents of sodium butyrate and octane aldehyde are recycled.
出处
《石油化工高等学校学报》
EI
CAS
2006年第3期37-40,共4页
Journal of Petrochemical Universities
关键词
废水处理
萃取
铁碳曝气氧化
Wastewater treatment
Extraction
Fe-C aeration-catalytic oxidation
