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Gonzales, A. (author)
The overall objective of the present study was to investigate the effects of thermal pre-treatment of waste activated sludge (WAS) at 70 °C with addition of H<sub>2</sub>O<sub>2</sub> to enhance sludge hydrolysis and subsequent methane production during WAS anaerobic digestion. The research was divided into four parts: Firstly, a bibliographical...
doctoral thesis 2022
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van den Berg, L. (author)
A large part of the wastewater produced worldwide is discharged without any treatment. This has several negative consequences, including the spread of diseases and contamination of the environment. One method to treat wastewater is called aerobic granular sludge (AGS), an advanced, compact technology that uses granules. Granules are spherical...
doctoral thesis 2022
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Wei, P. (author)
Excess sludge handling is as important as treating the wastewater in determining the operational performance and costs in modern municipal wastewater treatment plants (WWTPs). In practice, excess sludge handling is widely implemented using anaerobic digestion (AD), in which the organic matter inside the sludge is not only stabilised and partly...
doctoral thesis 2021
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de Valk, S.L. (author)
The overall objective of this thesis was to investigate ways to improve the extent and rate of waste activated sludge (WAS) hydrolysis by researching the WAS degrading activities and mechanisms of the aquatic worm Tubifex tubifex (T. tubifex) as a starting point. The WAS degrading aquatic worms were taken as a model “biochemical reactor” of...
doctoral thesis 2021
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