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Using boiling for treating waste activated sludge

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5 Author(s)
Chu, C. P. ; Chemical Engineering Department, Taiwan University, Taipei 106, China ; Liu, Z. W. ; Lee, D. J. ; Chang, Ben-Ven
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In this work we investigated the feasibility of using short time, low superheat boiling to treat biological sludge. The treated sludge exhibited reduced filterability and enhanced settleability. The boiling treatment released a large amount of extra-cellular polymers (ECPs) from the solid phase and reduced the microbial density levels of the total coliform bacteria and the heterotrophic bacteria. A diluted sludge is preferable for its high degree of organic hydrolysis and sufficient reduction in microbial density levels.

Published in:

Tsinghua Science and Technology  (Volume:7 ,  Issue: 2 )