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Effect of iron dosing on metal and phosphorus behaviour in anaerobic digesters

Angulo-Fernandez, Ursula (2011)
M.Phil. thesis, University of Birmingham.

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Abstract

Iron salts are used at wastewater treatment works to remove phosphorus for the final effluent as the excess of phosphorus in this effluent can result in eutrophication. The sludge rich in iron and phosphorus generated after the addition of iron must be stabilized before disposal usually by anaerobic digestion. This research investigated the effect of different iron salts at different ratios iron:phosphorus on anaerobic digestion of iron and phosphorus rich sludge by measuring biogas and methane production and the destruction of organics as well as the effect on phosphorus removal. Iron and phosphorus inorganic profiles were also studied of samples generated before and after digestion in order to establish any relationship between the content of iron and phosphorus in the bioavailable fraction and biogas and methane production. The approach used in this research was direct comparison of iron-dosed activated sludge and non iron-dosed activated, using the iron-dosing laboratory method developed for Smith and Carliell-Marquet (2009). Results from this research showed that iron has not always a detrimental effect on anaerobic digestion as biogas and methane production. The phosphorus removal efficiency was greater in all the experiments within the range 91.5-99.69%.

Type of Work:M.Phil. thesis.
Supervisor(s):Carliell-Marquet, Cynthia and Barlett, Rebecca
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:School of Civil Engineering
Subjects:TA Engineering (General). Civil engineering (General)
Institution:University of Birmingham
ID Code:1749
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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