Anaerobic digestion of waste activated sludge combined with ozone post-treatment and recycling

被引:38
作者
Battimelli, A [1 ]
Millet, C [1 ]
Delgenès, JP [1 ]
Moletta, R [1 ]
机构
[1] INRA, Lab Environm Biotechnol, F-11100 Narbonne, France
关键词
anaerobic digestion; biogas; combined process; ozonation; sludge treatment; waste activated sludge;
D O I
10.2166/wst.2003.0222
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The aim of the study was to determine the performances of a combined ozone/anaerobic digestion system for waste activated sludge reduction. The objective was the estimation of the process efficiency and stability when keeping constant influent flow while increasing recycled chemically treated flow. The ozonation step consisted in a partial oxidation (0.16 g O-3/g SS) of the anaerobic mesophilic digested sludge. Chemical treatment of digested sludge resulted in a threefold COD solubilization and a decrease of SS of 22%. Some of the advantages of digested sludge ozonation were: deodorization, better settlement and a reduction in viscosity. However there were drawbacks: foaming during ozonation and, at high ozone doses, poorer filterability. The anaerobic digestion was carried out over 6 months with an increasing recycling of ozonated flow. Suspended solids removal rate and COD removal rate were compared with initial operating conditions for the biological reactor and the whole combined process. The optimum recycling rate was 25% with increases of SS removal and COD removal of 54% and 66% respectively when considering the combined process; corresponding to a decrease of the hydraulic retention time from 24 days to 19 days.
引用
收藏
页码:61 / 68
页数:8
相关论文
共 14 条
[11]   Effects of thermochemical pretreatment on the anaerobic digestion of waste activated sludge [J].
Tanaka, S ;
Kobayashi, T ;
Kamiyama, K ;
Bildan, MLNS .
WATER SCIENCE AND TECHNOLOGY, 1997, 35 (08) :209-215
[12]   Ultrasonic waste activated sludge disintegration for improving anaerobic stabilization [J].
Tiehm, A ;
Nickel, K ;
Zellhorn, M ;
Neis, U .
WATER RESEARCH, 2001, 35 (08) :2003-2009
[13]   Anaerobic digestion of ozonized biosolids [J].
Weemaes, M ;
Grootaerd, H ;
Simoens, F ;
Verstraete, W .
WATER RESEARCH, 2000, 34 (08) :2330-2336
[14]   AN INNOVATIVE APPROACH TO REDUCE EXCESS SLUDGE PRODUCTION IN THE ACTIVATED-SLUDGE PROCESS [J].
YASUI, H ;
SHIBATA, M .
WATER SCIENCE AND TECHNOLOGY, 1994, 30 (09) :11-20