Real-time process dynamics monitoring in Anammox reactors

Process dynamics in Anammox systems were evaluated through continuous monitoring of pH, oxidation reduction potential (ORP) and conductivity in two separate newly started-up sequencing batch reactors, one seeded with an enriched Anammox sludge and the other seeded with mixed activated sludge. The pH...

Full description

Saved in:
Bibliographic Details
Published in:Water science and technology 2014-01, Vol.70 (2), p.183-191
Main Authors: ALPASLAN KOCAMEMI, B, DITYAPAK, D
Format: Article
Language:English
Subjects:
Activated sludge
Ammonium Compounds - metabolism
Anaerobiosis
Applied sciences
Batch reactors
Bioreactors
Conductivity
Dynamics
Electric Conductivity
Exact sciences and technology
General purification processes
Hydrogen-Ion Concentration
Monitoring
Oxidation
Oxidation-Reduction
pH effects
Pollution
Profiles
Reactors
Real time
Removal
Sequencing batch reactor
Sludge
Systems analysis
Time Factors
Trace elements
Waste Disposal, Fluid - methods
Wastewaters
Water treatment and pollution
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Process dynamics in Anammox systems were evaluated through continuous monitoring of pH, oxidation reduction potential (ORP) and conductivity in two separate newly started-up sequencing batch reactors, one seeded with an enriched Anammox sludge and the other seeded with mixed activated sludge. The pH and ORP profiles exhibited characteristic patterns depending on the process dynamics during early start-up, start-up and enrichment phases of the operational period of 410 days. The simultaneously continuing processes of the start-up period showed apparent indicative trend lines in pH and ORP profiles. Conductivity profiles were consistent with the process dynamics in all phases. During the enrichment phase, conductivity decreases could quantitatively be related to process removal efficiencies and all real-time profiles exhibited specific break-points which coincided with the end of Anammox in each cycle. The end of Anammox was observed as an 'apex' on pH profiles and a 'valley' on ORP profiles. The 'apex' and 'valley' points exactly coincided with the end point of the linear decrease in the conductivity profiles. The overall findings suggested a great potential in using real-time pH, ORP and conductivity measurements for quick and reliable monitoring of Anammox systems during start-up and enrichment periods.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2014.130