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Journal of Chemistry
Volume 2015, Article ID 901021, 9 pages
http://dx.doi.org/10.1155/2015/901021
Research Article

The Leachate Release and Microstructure of the Sewage Sludge under the Anaerobic Fermentation

Institute of Porous Mechanics, Wuhan Polytechnic University, Wuhan 430023, China

Received 1 February 2015; Accepted 21 April 2015

Academic Editor: Yuangen Yang

Copyright © 2015 Yiqie Dong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Pollutant release, pore structure, and thermal effect of sewage sludge during anaerobic fermentation were investigated. Results showed that the pH value firstly declined and then increased during anaerobic fermentation. The BOD5 and organics of sewage sludge declined, and the BOD5 of samples which was originally neutral declined as much as 53.6%. The micropore of samples was relatively developed. The biggest adsorption amount was 69.2 cm3/g. The average pore size was enlarged about 16.0–19.8% under anaerobic fermentation. There existed endothermic valley during heating procedure of 0–200C because of the dehydration, and the mass loss was 60.9–72.5%. The endothermic valley of the sample fluctuated at the 14th day in the anaerobic fermentation. During the heating procedure of 200–600C, there existed exothermal peaks because of the oxidation and burning of the organics. The curve of sample which was originally neutral had comparatively large endothermic valley and exothermal peak.