期刊
ENVIRONMENTAL ENGINEERING AND MANAGEMENT JOURNAL
卷 17, 期 12, 页码 2837-2845出版社
GH ASACHI TECHNICAL UNIV IASI
关键词
activated sludge; carbamazepine; composite central design; principal component analysis
资金
- Lebanese university
- Lebanese social association Azm and Saadeh
Activated sludge (AS) is the mainly used biological process in water treatment; therefore, assessing the influence of various operating conditions on this process is relevant. This study aimed to evaluate at laboratory-scale the influence of the gas-to-liquid volume ratio (RG) and the stirring speed (SS) on the biodegradation of carbamazepine (CBZ) by activated sludge. For this purpose, a central composite design (CCD) was used in association with response surface methodology (RSM). Batch cultures were carried out at room temperature for 21 days in a mineral medium of initial pH 7, containing CBZ at an initial concentration of 5 mg L-1 and a given amount of AS (achieving 0.05 AU at 600 nm). The two parameters SS and R-G/L have been varied in the ranges of 80 to 320 rpm and 0.2 to 5, respectively. The pH, the (600 nm)-absorbance and the concentration of CBZ in the medium were monitored and their kinetics were modeled and linked to the operating conditions using principal component analysis (PCA). The obtained results showed that a low content of oxygen has a high positive effect, while an extreme stirring speed has a tiny negative effect on the process yield.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据