内电解法处理印染废水的效果研究与分析
收稿日期: 2003-11-22
网络出版日期: 2010-10-01
Study and analysis of the application results of internal electrolysis to dyestuff wastewater treatment
Received date: 2003-11-22
Online published: 2010-10-01
蓝连贺 . 内电解法处理印染废水的效果研究与分析[J]. 工业水处理, 2004 , 24(7) : 24 -27 . DOI: 10.11894/1005-829x.2004.24(7).24
The composition of dyestuff wastewater is complicated.Its chromaticity is high, CODCr is high and hard to be degraded by biochemical treatment.That is why it causes serious pollution to the environments.Biochemistry-coagulation sedimentation, coagulation gas floation, chemical oxidation and activated carbon adsorption are generally used.But the operation cost of these methods is expensive and hard to be managed.The basic principle of the internal electrolysis is to make use of the iron and carbon constituents in iron filings, forming anode and cathode of small batteries, and the dyestuff wastewater is conducted as electrolyte.Then oxidation-reduction reaction occurs and the internal electrolysis is used for the pretreatment of dyestuff wastewater.The decoloration rate of the dyestuff wastewater is from 75% to 90%, and the removal rate of CODCr may reach 55%.The internal electrolysis may improve the result of the biochemical treatment of the dyestuff wastewater: the BOD5/CODCr of dyestuff wastewater drops from 0.23 to 0.57.It sets up the foundation for the sequent biochemical treatment, for coming up to the standard and for lowering the operational cost.Its management is easy.
Key words: internal electrolysis; pretreatment; dyestuff wastewater
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