Title
Dynamic control of nutrient-removal from industrial wastewater in a sequencing batch reactor (SBR), using common and low-cost online sensors Dynamic control of nutrient-removal from industrial wastewater in a sequencing batch reactor (SBR), using common and low-cost online sensors
Author
Faculty/Department
Faculty of Applied Engineering Sciences
Publication type
article
Publication
Oxford ,
Subject
Engineering sciences. Technology
Source (journal)
Water science and technology. - Oxford
Volume/pages
73(2016) :4 , p. 740-745
ISSN
0273-1223
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
On-line control of the biological treatment process is an innovative tool to cope with variable concentrations of chemical oxygen demand and nutrients in industrial wastewater. In the present study we implemented a simple dynamic control strategy for nutrient-removal in a sequencing batch reactor (SBR) treating variable tank truck cleaning wastewater. The control system was based on derived signals from two low-cost and robust sensors that are very common in activated sludge plants, i.e. oxidation reduction potential (ORP) and dissolved oxygen. The amount of wastewater fed during anoxic filling phases, and the number of filling phases in the SBR cycle were determined by the appearance of the nitrate knee in the profile of the ORP. The phase length of the subsequent aerobic phases was controlled by the oxygen uptake rate measured online in the reactor. As a result, the sludge loading rate (F/M ratio), the volume exchange rate and the SBR cycle length adapted dynamically to the activity of the activated sludge and the actual characteristics of the wastewater, without affecting the final effluent quality.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/4a3c53/128407_2016_04_28.pdf
Handle