生物降解甲基紫染料废水的研究

STUDY ON THE BIODEGRADATION OF METHYL VIOLET W ASTE WATE R

采用新型的喷射环流三相生物反应器，以牛粪浆作活性污泥源，粉煤灰为生物载体，研究了活性污泥法处理甲基紫染料废水过程。确定出该过程的最佳降解操作条件为：ｐ Ｈ＝ ６．５～７．５，温度为 ２８ ℃，通气流量为 １．５ ｍ ３·ｈ－ １；降解过程的脱色率超过 ９４ ％ ，连续运行时 Ｃ Ｏ Ｄｃｒ的去除率在 ６２ ％ 左右。实验得出甲基紫降解动力学方程式为： － ｄ Ｓｅｄｔ ＝ ０．０９３６ Ｘ Ｓｅ２１９＋ Ｓｅ （ｍ ｇ· Ｌ－ １·ｈ－ １）

Degradation process of m ethyl violet w aste w ater through the activatedsludge treatm ent w as investigated in a new kind ofjet loop three phase bioreactors, usingcattle dung slurry as the source ofactivated sludge and the coalpow deras biologicalcarri er. The optim ized degradation conditions w ere determ ined as follow s: p H= 6.5～7.5,tem perature= 28 ℃, gas flux= 1.5 m 3 ·h- 1. The decolorized degree in this degradationprocess w as up to 94% , and the decrease of C O Dcr w as about 62% during the continuousdegradation process. The kinetic equation ofm ethylvioletw aste degradation w as obtainedby experim ents: - d Sedt= 0.0936 X Se219+ Se (m g· L- 1 ·h- 1) Keyw ords: activated sludge; dye w aste w ater; treatm ent of w aste w aterS T U D Y O N T H E B I O D E G R A D A T I O N O F M E T H Y L V I O L E T W A S T E W A T E R W A N G Yi ping, Z H A N G Jin li, S O N G Kuan xiu, W A N G En xiang( Schoolof Chem ical Engineering in Tianjin University, Tianjin 300072, China) A B S T R A C T: Degradation process of m ethyl violet w aste w ater through the activatedsludge treatm ent w as investigated in a new kind ofjet loop three phase bioreactors, usingcattle dung slurry as the source ofactivated sludge and the coalpow deras biologicalcarri er. The optim ized degradation conditions w ere determ ined as follow s: p H= 6.5～7.5,tem perature= 28 ℃, gas flux= 1.5 m 3 ·h- 1. The decolorized degree in this degradationprocess w as up to 94% , and the decrease of C O Dcr w as about 62% during the continuousdegradation process. The kinetic equation ofm ethylvioletw aste degradation w as obtainedby experim ents: - d Sedt= 0.0936 X Se219+ Se (m g· L- 1 ·h- 1)