Influence of microwave and ultrasound on sludge dewaterability

DOI

10.2991/icmaee-14.2014.8How to use a DOI?

Keywords

sludge, microwave, ultrasound, dewaterability morphology

Abstract

Sludge with large production is difficult to be dewatered without any pretreatment. Pretreatment with ultrasound and microwave can adjust the structure of sludge and change the water form, therefore increase the water content which could be dispelled easily. Dewaterability and morphological of sludge from sewage treatment plant including microwave and ultrasound were studied. Capillary Suction Time(CST), viscosity, Settle Volume(SV), water content, Chemical Oxygen Demand (COD), Zeta potential and morphological characteristics were tested. After microwave modification, the particle size of sludge ranged from 33.55 m to 28.98 m, and fractal dimension was about 2.8. Microscopic image analysis showed that the particle of sludge became coarse. After ultrasound modification, the particle size of sludge ranged from 33.55 m to 9.44 m, fractal dimension was about 2.9. Thus, the smaller particles were observed after ultrasound. The gray associate degree coefficient of viscosity and moisture content is the bigest. Through the analysis of dewatering characteristics of sludge and water content, a model which contributes to predict moisture content of sludge online was established.

Copyright

© 2014, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Ying Ling
AU  - Cuihong Zhou
AU  - Xinyue Li
PY  - 2014/03
DA  - 2014/03
TI  - Influence of microwave and ultrasound on sludge dewaterability
BT  - Proceedings of the International Conference on Material and Environmental Engineering (ICMAEE 2014)
PB  - Atlantis Press
SP  - 29
EP  - 32
SN  - 1951-6851
UR  - https://doi.org/10.2991/icmaee-14.2014.8
DO  - 10.2991/icmaee-14.2014.8
ID  - Ling2014/03
ER  -