Table of Contents
ISRN Materials Science
Volume 2012 (2012), Article ID 598798, 7 pages
Research Article

Development of Rotary Magnetoferrite Treatment with Stirrers for Waste Water Treatment Plants to Reduce Excess Sludge

1Department of Electrical and Electronic Engineering, Graduate School of Engineering and Resource Science, Akita University, 1-1 Tegata Gakuenmachi, Akita 010-8502, Japan
2Akita University, 1-1 Tegata Gakuenmachi, Akita 010-8502, Japan

Received 12 September 2011; Accepted 28 September 2011

Academic Editors: P. A. Cooper and I. Lancellotti

Copyright © 2012 Mahmudul Kabir 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.


A large amount of excess sludge is being produced in the waste water treatment plants (WWTPs), which is a serious problem in terms of economical and environmental problems. So, the experiments on reduction of excess sludge are carried out. We have introduced a new approach for reduction of excess sludge by using ferrite particles and permanent magnets. A rotary treatment plant was introduced which showed good possibilities of this method for application in the WWTPs. Stirrers hold a very important role in rotary magnetoferrite treatment as they directly get in touch with ferrite particles and sludge. In this paper, we have shown the relationship between the ferrite particles and stirrers. Again, the treatment was carried out for different amounts of activated sludge which shows that the smaller the amount, the better the treatment of sludge. This knowledge may pave the way for the reduction of excess sludge in WWTPs in practical fields.