Back to Search
Start Over
Carrier surface modification for enhanced attachment and growth of anammox biofilm
- Source :
- Science of The Total Environment. 811:151317
- Publication Year :
- 2022
- Publisher :
- Elsevier BV, 2022.
-
Abstract
- This study investigates and compares the ammonia removal kinetics, attachment, biofilm development and anammox bacteria enrichment on various surface modified carriers throughout the 163 days of start-up of an MBBR system: virgin, dextran-functionalized carriers, silica-functionalized and pre-seeded denitrifying carriers. Silica-functionalized carriers along with pre-seeded denitrifying carriers induced significant higher kinetics, faster biofilm growth and greater anammox bacteria enrichment during the 64 days of operation compared to non-modified virgin and dextran-functionalized carriers. The elevated anammox bacteria counts along with the elevated kinetics of all carriers measured at day 106 indicated that the completed biofilm growth and biofilm maturation are achieved prior to or at day 106 of start-up. The NH4+-N removal rate for virgin, dextran-functionalized, silica-functionalized and pre-seeded denitrifying carriers were achieved 0.684 ± 0.019, 0.608 ± 0.016, 0.634 ± 0.017 and 0.665 ± 0.018 g NH4+-N/m2/d, respectively, at day 106. The results demonstrate that the silica-functionalized and pre-seeded denitrifying carriers offer advantages during the early stage of start-up while the dextran-functionalized carriers did not reduce the start-up period for anammox biofilm.
- Subjects :
- Environmental Engineering
Nitrogen
Kinetics
0207 environmental engineering
Removal kinetics
02 engineering and technology
Anaerobic Ammonia Oxidation
03 medical and health sciences
Ammonia
chemistry.chemical_compound
Denitrifying bacteria
Bioreactors
Environmental Chemistry
Anaerobiosis
Food science
020701 environmental engineering
Waste Management and Disposal
030304 developmental biology
0303 health sciences
Sewage
biology
Chemistry
Biofilm
food and beverages
biology.organism_classification
Pollution
Anammox
Biofilms
Surface modification
Oxidation-Reduction
Bacteria
Subjects
Details
- ISSN :
- 00489697
- Volume :
- 811
- Database :
- OpenAIRE
- Journal :
- Science of The Total Environment
- Accession number :
- edsair.doi.dedup.....33d7f5e72506b7dfce0fff1856a4e5b0