Incidence of an ozonation stage on the treatment of cherry stillage by activated sludge

被引：4

作者：

Beltrán, FJ ^{[1
]}

Alvarez, PM ^{[1
]}

Rodríguez, EM ^{[1
]}

Rivas, J ^{[1
]}

机构：

[1] Univ Extremadura, Dept Ingn Quim & Energet, E-06071 Badajoz, Spain

来源：

OZONE-SCIENCE & ENGINEERING | 2004年 / 26卷 / 03期

关键词：

ozone; activated sludge; cherry stillage; wastewater treatment; polyphenol;

D O I：

10.1080/01919510490455692

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This article presents a laboratory study of the ozonation of diluted cherry stillage, a high-strength wastewater. Influence of variables, kinetics, and the effects of an ozonation stage coupled with the biological treatment by activated sludge are addressed. Single activated sludge processing was shown effective to remove biological oxygen demand (BOD) and chemical oxygen demand (COD) but polyphenols were reduced to a lesser extent. On the other hand, direct wastewater ozonation did not reduce COD and total organic carbon (TOC) appreciably, and foaming problems were experienced when a high gas flow rate was applied. However, polyphenols and UV254 absorbance decreased substantially by means of ozonation. To best achieve complete cherry stillage purification, two ways of coupling ozonation with activated sludge are proposed. Ozonation prior to activated sludge is advised for high-concentration wastewater to reduce polyphenol concentration, thus removing inhibiting effects. For wastewater with low polyphenol concentration the sequence activated sludge-ozonation-activated sludge is preferred to enhance the overall process performance in terms of oxidation efficiency and sludge settling.

引用

页码：257 / 266

页数：10

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