Volume 4, Issue 3, September 2018, Page: 75-79
Optimization of Anaerobic Granular Sludge by Removing Biogas
Guan Xijun, School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
Xia Lijia, School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China
Received: Sep. 25, 2018;       Accepted: Oct. 10, 2018;       Published: Oct. 25, 2018
DOI: 10.11648/j.ajwse.20180403.13      View  281      Downloads  11
Abstract
The loss of granular sludge and acidification of sludge are common problems in highly efficient anaerobic reactors in operation at present, which results in that the reactors cannot reach the design COD removal rates. The problems must be solved for the widespread use of the highly efficient anaerobic reactors. There are many different studies on the formation and loss of granular sludge in an anaerobic reactor, however, the researchers ignore the effects of the gas-producing and biogas-off process of granular sludge on the formation mechanism of granular sludge. The sedimentation and buoyancy phenomena of the granular sludge cultured by self-made transparent reactor were observed in the lab and their relative velocities were measured by photos. Granular sludge and their biogas are coexistent, that is, any size particles of granular sludge can form high floating speed when granular sludge particles contain a lot of bubbles and the granular sludge particles can precipitate well when the air bubbles of granular sludge particles are released in time. So the water test on the sedimentation rate of granular sludge is insufficient. Unified consideration of granular sludge and biogas is beneficial to solve the loss of granular sludge and acidation of sludge in anaerobic reactors and to ensure the normal operation of anaerobic reactors. The biogas-off of biogas produced by anaerobic sludge has essential effects on the granulation of granular sludge. It is conducive to highly efficient anaerobic reactors and three phase separator to reconstruct.
Keywords
Biogas, Granular Sludge, Settlability, the Loss of Granular Sludge, Relative Density
To cite this article
Guan Xijun, Xia Lijia, Optimization of Anaerobic Granular Sludge by Removing Biogas, American Journal of Water Science and Engineering. Vol. 4, No. 3, 2018, pp. 75-79. doi: 10.11648/j.ajwse.20180403.13
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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