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http://dx.doi.org/10.17137/korrae.2021.29.4.107

Disintegration of sewage sludge using combined pre-treatment thermal hydrolysis and separation  

Lee, See-Young (Department of Environmental Engineering, Graduate School, The University of Seoul)
Han, Ihn-Sup (Department of Environmental Engineering, Graduate School, The University of Seoul)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.29, no.4, 2021 , pp. 107-114 More about this Journal
Abstract
This study applied with pre-treatment combined with thermal hydrolysis and seperation for disintegration of sludge. As results of particle size distribution D10, D50 and D90 of thermal hydrolyzed and centrifuged sludge was 8.6, 59.2 and 425.1 ㎛, which are lower than those of thermal hydrolyzed. The molecular weight distribution results showed that the thermal hydrolyzed sludge showed the highest proportion in the 10-100kDa range. But, Sludge, treated with combined pre-treatment, showed the highest proportion <1kDa range. Results of DOC and UVA254 found that the organic matters of hydrolyzed sludge composed high molecular weight component above 10kDa. While, the organic matters of sludge, treated by combined pre-treatment, composed relarively low molecular weight below 1kDa. The specific methane yield of hydrolyzed and centrifuged sludge was higher 1.7 times than that of only hydrolyzed sludge.
Keywords
Thermal hydrolysis; Separation; Anaerobic digestion; Dewatered sludge; Disintegration;
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