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Kinetics of Removal of Particulate Chemical Oxygen Demand in the Activated‐Sludge Process
The existing theories incorporated to state‐of‐the‐art, activated‐sludge‐consensus models indicate that the removal of particulate substrate from the liquid in the activated‐sludge process is a two‐step process: instantaneous enmeshment of particles and hydrolysis followed by oxidation. However, experimental observations indicate that the removal of particles is not instantaneous and needs a more accurate description. This removal process can actually be described as a three‐step process: flocculation, hydrolysis, and oxidation. The principal objective of this research was to observe and model the kinetics of the removal of suspended particles and colloidal particles. A first‐order, particulate‐removal expression, based on flocculation, accurately described the removal rates for supernatant suspended solids and colloidal chemical oxygen demand (COD). The rate of reaction for removal of colloidal COD was slow and comparable to that for soluble organic matter.
Kinetics of Removal of Particulate Chemical Oxygen Demand in the Activated‐Sludge Process
The existing theories incorporated to state‐of‐the‐art, activated‐sludge‐consensus models indicate that the removal of particulate substrate from the liquid in the activated‐sludge process is a two‐step process: instantaneous enmeshment of particles and hydrolysis followed by oxidation. However, experimental observations indicate that the removal of particles is not instantaneous and needs a more accurate description. This removal process can actually be described as a three‐step process: flocculation, hydrolysis, and oxidation. The principal objective of this research was to observe and model the kinetics of the removal of suspended particles and colloidal particles. A first‐order, particulate‐removal expression, based on flocculation, accurately described the removal rates for supernatant suspended solids and colloidal chemical oxygen demand (COD). The rate of reaction for removal of colloidal COD was slow and comparable to that for soluble organic matter.
Kinetics of Removal of Particulate Chemical Oxygen Demand in the Activated‐Sludge Process
Jimenez, Jose A. (author) / La Motta, Enrique J. (author) / Parker, Denny S. (author)
Water Environment Research ; 77 ; 437-446
2005-09-01
10 pages
Article (Journal)
Electronic Resource
English
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