A comparative study between mechanical, thermal and oxidative disintegration techniques of waste activated sludge

被引:63
作者
Camacho, P
Deleris, S
Geaugey, V
Ginestet, P
Paul, E
机构
[1] CIRSEE, ONDEO Serv, F-78230 Le Pecq, France
[2] INSA Toulouse, Dept Genie Procedes Ind, Lab Ingn Procedes Environm, F-31077 Toulouse 4, France
关键词
activated sludge; hydrogen peroxide; mechanical; ozone; release COD; thermal;
D O I
10.2166/wst.2002.0295
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The release performances of an organic and mineral activated sludge matrix were studied for a wide range of disintegration treatments like mechanical, thermal, thermal-chemical and oxidative disintegration techniques. The maximal COD release was 35% of total COD after 24 hours contact time at 95degreesC. A limiting value of 60% COD release was obtained for 500 and 700 bars after 10 passes. Concerning the oxidative disintegration techniques (O-3 and H2O2), a limiting value of around 60-65% of TOC release was observed. Therefore, it was hypothesised that thermal and mechanical treatments allow mainly for breaking apart the micro-organisms while the oxidative treatment destroys the sludge flocs and disrupts the micro-organisms. A release effect of the mineral fraction is observed only oxidative disintegration techniques.
引用
收藏
页码:79 / 87
页数:9
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