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High-Loaded Activated Sludge - Improvement of a Solids Retention Time Controlled System

Nobel, Per LU (2015) VVA820 20151
Chemical Engineering (M.Sc.Eng.)
Abstract
Although 100 years old, the activated sludge system remains inevitable for modern wastewater treatment. Advancements within the development of mainstream nitrogen removal techniques based on anaerobic ammonium-oxidising bacteria have renewed the interest in traditional, high-loaded activated sludge systems for COD removal only. In order for activated sludge plants to be efficient in terms of energy use, methane production and areal footprint, the retention time for the active organisms, or analogously the solids retention time, needs to be kept low and precisely regulated.

At Sjölunda wastewater treatment plant, Sweden, an automated solids retention time control system at one of the activated sludge lines was recently implemented.... (More)
Although 100 years old, the activated sludge system remains inevitable for modern wastewater treatment. Advancements within the development of mainstream nitrogen removal techniques based on anaerobic ammonium-oxidising bacteria have renewed the interest in traditional, high-loaded activated sludge systems for COD removal only. In order for activated sludge plants to be efficient in terms of energy use, methane production and areal footprint, the retention time for the active organisms, or analogously the solids retention time, needs to be kept low and precisely regulated.

At Sjölunda wastewater treatment plant, Sweden, an automated solids retention time control system at one of the activated sludge lines was recently implemented. Operation of the experimental line with solids retention time set to 1.2 days with the controller was compared to a manually regulated line, operated at a higher solids retention time (about (Less)
Popular Abstract (Swedish)
The Sjölunda wastewater treatment plant faces the challenge of tougher demands for the quality of the water leaving the plant and entering the Öresund strait between Denmark and Sweden. At the same time, the population of Malmö with neighbourhood is growing rapidly, which means an increase in the loading on the plant. The residence time for the active microbes, the “sludge”, in the first biological treatment step has important implications for the treatment efficiency and also for the energy balance at the plant. Consequently, the “sludge age” must be determined and precisely controlled.
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author
Nobel, Per LU
supervisor
organization
course
VVA820 20151
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
avloppsteknik water engineering, environmental engineering, vattenförsörjningsteknik, High-loaded activated sludge, Solids retention time control, Sludge foaming, Activated Sludge Model, Non-settleable solids
language
English
id
7761014
date added to LUP
2015-08-18 11:20:17
date last changed
2015-08-18 11:20:17
@misc{7761014,
  abstract     = {Although 100 years old, the activated sludge system remains inevitable for modern wastewater treatment. Advancements within the development of mainstream nitrogen removal techniques based on anaerobic ammonium-oxidising bacteria have renewed the interest in traditional, high-loaded activated sludge systems for COD removal only. In order for activated sludge plants to be efficient in terms of energy use, methane production and areal footprint, the retention time for the active organisms, or analogously the solids retention time, needs to be kept low and precisely regulated.

At Sjölunda wastewater treatment plant, Sweden, an automated solids retention time control system at one of the activated sludge lines was recently implemented. Operation of the experimental line with solids retention time set to 1.2 days with the controller was compared to a manually regulated line, operated at a higher solids retention time (about},
  author       = {Nobel, Per},
  keyword      = {avloppsteknik water engineering,environmental engineering,vattenförsörjningsteknik,High-loaded activated sludge,Solids retention time control,Sludge foaming,Activated Sludge Model,Non-settleable solids},
  language     = {eng},
  note         = {Student Paper},
  title        = {High-Loaded Activated Sludge - Improvement of a Solids Retention Time Controlled System},
  year         = {2015},
}