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Innovative sludge disinfection approach to generate Class A biosolids for land applications


Innovative sludge disinfection approach to generate Class A biosolids for land applications

Luo, Jiaru (2018) Innovative sludge disinfection approach to generate Class A biosolids for land applications. Masters thesis, Concordia University.

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Beneficial use of biosolids (sludge), generated by municipal wastewater treatment plant, requires adequate disinfection before its land application. Traditional methods for sludge disinfection are either time consuming or cost demanded. To overcome the drawbacks, novel technologies which uses electrical field phenomena, were proposed to achieve Class A biosolids. Electro-Fenton disinfection and electrokinetics combined with biocide treatment were investigated in this thesis. The lab scale results demonstrated better effectiveness of Electro-Fenton disinfection than Fenton oxidation. Class A quality of biosolids (with 5.8 log reduction) has been achieved within 30 min when Electro-Fenton system was applied in presence of H2O2 (30%). It was found that technological parameters such as pH, current, hydrogen peroxide concentration, total solids content, ratios of Fe2+/H2O2 influenced effectiveness of sludge disinfection. The results showed that electrokinetic phenomena combined with biocide achieved faster disinfection efficiency reaching log 7.2 fecal coliform reduction within 30 to 50 min while the internal temperature rose to 40℃ only. Then, an optimization of current, as well as biocide dosage were conducted in this study. Scale up of the system has also demonstrated an effective sludge disinfection. The study showed that both systems can be applied to WAS (or potentially to other types of sludge) to convert it to Class A biosolids. The systems are particularly beneficial for sludge thickened with iron containing coagulant. The novel technologies produce fertilizing materials which are safe for environment and public health when landfarming.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Building, Civil and Environmental Engineering
Item Type:Thesis (Masters)
Authors:Luo, Jiaru
Institution:Concordia University
Degree Name:M.A. Sc.
Program:Civil Engineering
Date:27 June 2018
Thesis Supervisor(s):Elektorowicz, Maria
ID Code:983991
Deposited By: Jiaru Luo
Deposited On:16 Nov 2018 15:56
Last Modified:16 Nov 2018 15:56


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