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- Publisher Website: 10.1016/j.scitotenv.2021.148314
- Scopus: eid_2-s2.0-85107960776
- PMID: 34412408
- WOS: WOS:000686010000012
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Article: Using anammox biofilms for rapid start-up of partial nitritation-anammox in integrated fixed-film activated sludge for autotrophic nitrogen removal
Title | Using anammox biofilms for rapid start-up of partial nitritation-anammox in integrated fixed-film activated sludge for autotrophic nitrogen removal |
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Authors | |
Keywords | Autotrophic nitrogen removal Biofilm formation Integrated fixed-film activated sludge Partial nitritation-anammox Start-up Wastewater treatment |
Issue Date | 2021 |
Citation | Science of the Total Environment, 2021, v. 791, article no. 148314 How to Cite? |
Abstract | Integrated fixed-film activated sludge (IFAS) reactors are suitable for partial nitritation-anammox (PNA) for autotrophic nitrogen removal; however, its start-up and biofilm formation are slow and difficult. In this study, a new sludge seeding strategy was developed for the start-up of PNA-IFAS by using the pre-cultivated anammox biofilms. Two bioreactors were used in the experimental study, including a reactor that was started conventionally with the pre-acclimated suspended PNA sludge and bare biocarriers (PA-S) and a reactor that used the new seeding method with anammox biofilms pre-acclimated on biocarriers and ammonia-oxidizing bacteria (AOB) sludge in the suspension (PA-B). The use of anammox biofilms as the seed biomass greatly shortened the start-up period of the PNA-IFAS reactor to 1 month or so. Moreover, reactor PA-B achieved a higher nitrogen removal rate (707.3 mg N/(L·d)), better nitrogen removal efficiency (86.8 ± 2.8%), and lower nitrate yield (9.4%) than reactor PA-S. The biofilm development in PA-B was accelerated and its biofilm content was nearly 10 times higher than that of PA-S. The initial segregation of anammox in the biofilm and AOB in the suspended sludge provided an environment that not only accelerated the start-up of PNA-IFAS but also helped suppress the enrichment of unwanted nitrite-oxidizing bacteria (NOB) in the bioreactor, as evidenced by the lower NOB abundance in PA-B (<0.5%) than in PA-S (>2.2%) according to microbial community analysis. |
Persistent Identifier | http://hdl.handle.net/10722/327338 |
ISSN | 2023 Impact Factor: 8.2 2023 SCImago Journal Rankings: 1.998 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Li, Ying yu | - |
dc.contributor.author | Huang, Xiao wu | - |
dc.contributor.author | Li, Xiao yan | - |
dc.date.accessioned | 2023-03-31T05:30:37Z | - |
dc.date.available | 2023-03-31T05:30:37Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Science of the Total Environment, 2021, v. 791, article no. 148314 | - |
dc.identifier.issn | 0048-9697 | - |
dc.identifier.uri | http://hdl.handle.net/10722/327338 | - |
dc.description.abstract | Integrated fixed-film activated sludge (IFAS) reactors are suitable for partial nitritation-anammox (PNA) for autotrophic nitrogen removal; however, its start-up and biofilm formation are slow and difficult. In this study, a new sludge seeding strategy was developed for the start-up of PNA-IFAS by using the pre-cultivated anammox biofilms. Two bioreactors were used in the experimental study, including a reactor that was started conventionally with the pre-acclimated suspended PNA sludge and bare biocarriers (PA-S) and a reactor that used the new seeding method with anammox biofilms pre-acclimated on biocarriers and ammonia-oxidizing bacteria (AOB) sludge in the suspension (PA-B). The use of anammox biofilms as the seed biomass greatly shortened the start-up period of the PNA-IFAS reactor to 1 month or so. Moreover, reactor PA-B achieved a higher nitrogen removal rate (707.3 mg N/(L·d)), better nitrogen removal efficiency (86.8 ± 2.8%), and lower nitrate yield (9.4%) than reactor PA-S. The biofilm development in PA-B was accelerated and its biofilm content was nearly 10 times higher than that of PA-S. The initial segregation of anammox in the biofilm and AOB in the suspended sludge provided an environment that not only accelerated the start-up of PNA-IFAS but also helped suppress the enrichment of unwanted nitrite-oxidizing bacteria (NOB) in the bioreactor, as evidenced by the lower NOB abundance in PA-B (<0.5%) than in PA-S (>2.2%) according to microbial community analysis. | - |
dc.language | eng | - |
dc.relation.ispartof | Science of the Total Environment | - |
dc.subject | Autotrophic nitrogen removal | - |
dc.subject | Biofilm formation | - |
dc.subject | Integrated fixed-film activated sludge | - |
dc.subject | Partial nitritation-anammox | - |
dc.subject | Start-up | - |
dc.subject | Wastewater treatment | - |
dc.title | Using anammox biofilms for rapid start-up of partial nitritation-anammox in integrated fixed-film activated sludge for autotrophic nitrogen removal | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.scitotenv.2021.148314 | - |
dc.identifier.pmid | 34412408 | - |
dc.identifier.scopus | eid_2-s2.0-85107960776 | - |
dc.identifier.volume | 791 | - |
dc.identifier.spage | article no. 148314 | - |
dc.identifier.epage | article no. 148314 | - |
dc.identifier.eissn | 1879-1026 | - |
dc.identifier.isi | WOS:000686010000012 | - |