Enhancing biological treatment of dye wastewater with zero-valent iron

被引：11

作者：

Choi, Younggyun ^{[1
]}

Park, Byungju ^{[1
]}

Cha, Daniel Kuhyon ^{[2
]}

机构：

[1] Daegu Univ, Dept Environm Engn, Gyongsan 712714, South Korea

[2] Dept Civil & Environm Engn, Newark, DE 19716 USA

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2015年 / 32卷 / 09期

关键词：

Zero-valent Iron; Decolorization; ADMI Value; Anaerobic-aerobic Process; Biodegradability; AZO DYES; RESPIROMETRY; COMPONENTS; REDUCTION;

D O I：

10.1007/s11814-014-0388-5

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pretreatment of authentic industrial dye wastewater with zero-valent iron (ZVI) was evaluated using a bench-scale integrated anaerobic-aerobic (ZVI-AO) biological treatment system. Average ADMI (American Dye Manufacturers' Institute) value of dye wastewater was reduced from 245 to 107 units with ZVI column pretreatment. Subsequent treatment of ZVI column effluent by a continuous AO process further reduced the ADMI values to 18-39, resulting in overall decolorization efficiency of 78-89%. A control AO system without ZVI pretreatment, which was operated in parallel, achieved just 44-69% of ADMI removal efficiency. In addition, the ZVI integrated system yielded effluents with much lower COD and BOD concentrations than the control system. The aerobic batch respiration tests confirmed that ZVI treatment transformed the recalcitrant dye compounds to slowly biodegradable fractions, thus enhancing the overall biodegradability of dye wastewater.

引用

页码：1812 / 1817

页数：6