Du är här

Dissolved oxygen controller based on on-line measurements of ammonium combining feed-forward and feedback

Författare:
Publiceringsår: 2002
Språk: Engelska
Sidor: 453-460
Publikation/Tidskrift/Serie: WATER SCIENCE AND TECHNOLOGY
Volym: 45
Nummer: 4-5
Dokumenttyp: Artikel
Förlag: I W A PUBLISHING

Sammanfattning

As the largest single energy-consuming component in most biological wastewater treatment systems, control of aeration is of great interest seen from an energy savings point of view. This paper suggests a simple way of using on-line ammonium measurements to control aeration in a pre-denitrification plant by controlling the dissolved oxygen setpoint. The controller works primarily by feed-forward based on an ammonium sensor located at the head of the aerobic process part. Using online in-situ sensor measurements directly from the process have the important advantage over effluent measurements that there is no or very short time delay for information. The controller has been implemented in a full-scale wastewater treatment plant for a period of 35 days, During the experiment two identical activated sludge lines were used. The controller was implemented in one line, while the other line worked as a reference for comparison. The preliminary results indicate that the described control strategy leads to energy savings for the aeration in the region of 5-15%, while maintaining approximately the same effluent quality as in the reference line. Even higher energy savings can probably be achieved by optimising the controller. An automatic procedure for updating the controller parameters based on dynamic effluent ammonium measurement has been tested.

Disputation

Nyckelord

  • Technology and Engineering
  • Earth and Environmental Sciences
  • pre-denitrification plant
  • full-scale
  • control
  • activated sludge process
  • aeration
  • nitrogen removal
  • nutrient sensors

Övriga

Published
Yes
  • ISSN: 0273-1223

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

LERU logotype U21 logotype

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen