Effect of ultrasonic, thermal and ozone pre-treatments on waste activated sludge solubilisation and anaerobic biodegradability

被引:487
作者
Bougrier, C.
Albasi, C.
Delgenes, J. P.
Carrere, H.
机构
[1] INRA, Lab Biotechnol Environm, F-11100 Narbonne, France
[2] Lab Genie Chim, F-31106 Toulouse 1, France
关键词
ultrasounds; ozone; thermal treatment; solubilisation; methanisation; particle size; viscosity; capillary suction time; sewage sludge;
D O I
10.1016/j.cep.2006.02.005
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
In order to enhance the efficiency of anaerobic digestion, the effects of ultrasounds, ozonation and thermal pre-treatment have been studied on waste activated sludge. The feature of this study was to carry out the comparison of the three pre-treatments in the same conditions and on the same sludge sample. Each treatment was tested in two conditions close to optimum conditions to maximise batch anaerobic sludge biodegradability. All treatments led to chemical oxygen demand and matter solubilisation and had little influence on mineral matter. In terms of solubilisation thermal pre-treatment was better than sonication or ozonation. But, in terms of batch anaerobic biodegradability, best results were obtained with ultrasounds with an energy of 6250 or 9350kJ/kg TS and a thermal treatment at 170 or 190 degrees C. Moreover, treatments had effects on physicochemical characteristics of sludge samples: apparent viscosity decreased after all treatments but the reduction was more important with thermal treatment. Median diameter of sludge floes were reduced after sonication, increased after thermal treatment and did not change after ozonation. Finally, capillary suction time (CST) increased after ozonation, increased highly after sonication and was reduced after thermal treatment. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:711 / 718
页数:8
相关论文
共 30 条
[1]   Complete characterisation of thermally treated sludges [J].
Anderson, NJ ;
Dixon, DR ;
Harbour, PJ ;
Scales, PJ .
WATER SCIENCE AND TECHNOLOGY, 2002, 46 (10) :51-54
[2]  
[Anonymous], 1988, ULTRASOUND ITS CHEM
[3]   Anaerobic digestion of waste activated sludge combined with ozone post-treatment and recycling [J].
Battimelli, A ;
Millet, C ;
Delgenès, JP ;
Moletta, R .
WATER SCIENCE AND TECHNOLOGY, 2003, 48 (04) :61-68
[4]   Pre-treatment, measurement execution procedure and waste characteristics in the rheology of sewage sludges and the digested organic fraction of municipal solid wastes [J].
Battistoni, P .
WATER SCIENCE AND TECHNOLOGY, 1997, 36 (11) :33-41
[5]   Solubilisation of waste-activated sludge by ultrasonic treatment [J].
Bougrier, C ;
Carrère, H ;
Delgenès, JP .
CHEMICAL ENGINEERING JOURNAL, 2005, 106 (02) :163-169
[6]  
BOUGRIER C, 2003, THESIS U MONTPELLIER
[7]  
BOUGRIER C, 2005, IO3A 17 INT OZ ASS C
[8]   Study of competition for ozone between soluble and particulate matter during activated sludge ozonation [J].
Cesbron, D ;
Déléris, S ;
Debellefontaine, H ;
Roustan, M ;
Paul, E .
CHEMICAL ENGINEERING RESEARCH & DESIGN, 2003, 81 (A9) :1165-1170
[9]   Observations on changes in ultrasonically treated waste-activated sludge [J].
Chu, CP ;
Chang, BV ;
Liao, GS ;
Jean, DS ;
Lee, DJ .
WATER RESEARCH, 2001, 35 (04) :1038-1046
[10]  
Clesceri L., 1992, Standard Methods for the Examination of Water and Wastewater, V17th