A novel integration of three-dimensional electro-Fenton and biological activated carbon and its application in the advanced treatment of biologically pretreated Lurgi coal gasification wastewater. (November 2015)

• Record Type: Journal Article
• Authors: Hou, Baolin; Han, Hongjun; Zhuang, Haifeng; Xu, Peng; Jia, Shengyong; Li, Kun
• Is Part Of: Bioresource technology. Volume 196(2015)
• Page Start: 721
• Page End: 725
• Publication Date: 2015-11
• Subjects: Biologically pretreated Lurgi coal gasification wastewater -- Three-dimensional electro-Fenton -- Catalytic particle electrodes -- Reaction mechanism discussion -- Biological activated carbon; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2015.07.068
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: SAC-Fe developed from sewage/iron sludge served as CPEs and catalyst in 3D EF. 3D EF exhibited excellent capacity in abating COLOR and toxicity and improving biodegradability. The enhancement of pollutants removal in 3D EF attributed to generating more H2 O2 and OH. The total operating cost of the integrated process was 1.1 CNY/t. The integration of 3D EF and BAC was more efficient at shorter retention time. Abstract: A novel integrated process with three-dimensional electro-Fenton (3D EF) and biological activated carbon (BAC) was employed in advanced treatment of biologically pretreated Lurgi coal gasification wastewater. SAC-Fe (sludge deserved activated carbon from sewage and iron sludge) and SAC (sludge deserved activated carbon) were used in 3D EF as catalytic particle electrodes (CPEs) and in BAC as carriers respectively. Results indicated that 3D EF with SAC-Fe as CPEs represented excellent pollutants and COLOR removals as well as biodegradability improvement. The efficiency enhancement attributed to generating more H2 O2 and OH. The integrated process exhibited efficient performance of COD, BOD5, total phenols, TOC, TN and COLOR removals at a much shorter retention time, with the corresponding concentrations in effluent of 31.18, 6.69, 4.29, 17.82, 13.88 mg/L and <20 times, allowing discharge criteria to be met. The integrated system was efficient, cost-effective and ecological sustainable and could be a promising technology for engineering applications.