Cargando…

Filamentous Bacteria and Stalked Ciliates for the Stable Structure of Aerobic Granular Sludge Treating Wastewater

Aerobic granular sludge (AGS) is a promising technology for wastewater treatment. AGS formation belongs to microbial self-aggregation. Investigation of the formation and stability of AGS is widely paid attention to, in particular the structure stability of large size granules. Two types of AGS were...

Descripción completa

Detalles Bibliográficos
Autores principales: Liang, Yifan, Pan, Zengrui, Guo, Tao, Feng, Hongbo, Yan, Anqi, Ni, Yongjiong, Li, Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9735926/
https://www.ncbi.nlm.nih.gov/pubmed/36497821
http://dx.doi.org/10.3390/ijerph192315747
_version_ 1784846893881229312
author Liang, Yifan
Pan, Zengrui
Guo, Tao
Feng, Hongbo
Yan, Anqi
Ni, Yongjiong
Li, Jun
author_facet Liang, Yifan
Pan, Zengrui
Guo, Tao
Feng, Hongbo
Yan, Anqi
Ni, Yongjiong
Li, Jun
author_sort Liang, Yifan
collection PubMed
description Aerobic granular sludge (AGS) is a promising technology for wastewater treatment. AGS formation belongs to microbial self-aggregation. Investigation of the formation and stability of AGS is widely paid attention to, in particular the structure stability of large size granules. Two types of AGS were developed in two sequencing batch reactors fed by two different wastewaters, respectively. Through confocal laser scanning microscope (CLSM) and scanning electron microscopy (SEM), the structure and composition of granules were analyzed. Filamentous bacteria were observed in granules from synthetic wastewater reactor, while filamentous bacteria and stalked ciliates (Epistylis sp.) were simultaneously found in granules from domestic wastewater reactor. The analytic results show that filamentous bacteria and stalked ciliates acting as skeletons play important roles in the formation and stability of granules. With the bonding of extracellular polymeric substances (EPS), the filamentous bacteria and stalked ciliates could build bridges and frames to promote the aggregation of bacteria; these microorganisms could create a space grid structure around the surface layer of granules to enhance the strength of granules, and the remnants of the stalks could serve as supports to fix the steadiness of granules.
format Online
Article
Text
id pubmed-9735926
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-97359262022-12-11 Filamentous Bacteria and Stalked Ciliates for the Stable Structure of Aerobic Granular Sludge Treating Wastewater Liang, Yifan Pan, Zengrui Guo, Tao Feng, Hongbo Yan, Anqi Ni, Yongjiong Li, Jun Int J Environ Res Public Health Article Aerobic granular sludge (AGS) is a promising technology for wastewater treatment. AGS formation belongs to microbial self-aggregation. Investigation of the formation and stability of AGS is widely paid attention to, in particular the structure stability of large size granules. Two types of AGS were developed in two sequencing batch reactors fed by two different wastewaters, respectively. Through confocal laser scanning microscope (CLSM) and scanning electron microscopy (SEM), the structure and composition of granules were analyzed. Filamentous bacteria were observed in granules from synthetic wastewater reactor, while filamentous bacteria and stalked ciliates (Epistylis sp.) were simultaneously found in granules from domestic wastewater reactor. The analytic results show that filamentous bacteria and stalked ciliates acting as skeletons play important roles in the formation and stability of granules. With the bonding of extracellular polymeric substances (EPS), the filamentous bacteria and stalked ciliates could build bridges and frames to promote the aggregation of bacteria; these microorganisms could create a space grid structure around the surface layer of granules to enhance the strength of granules, and the remnants of the stalks could serve as supports to fix the steadiness of granules. MDPI 2022-11-26 /pmc/articles/PMC9735926/ /pubmed/36497821 http://dx.doi.org/10.3390/ijerph192315747 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Liang, Yifan
Pan, Zengrui
Guo, Tao
Feng, Hongbo
Yan, Anqi
Ni, Yongjiong
Li, Jun
Filamentous Bacteria and Stalked Ciliates for the Stable Structure of Aerobic Granular Sludge Treating Wastewater
title Filamentous Bacteria and Stalked Ciliates for the Stable Structure of Aerobic Granular Sludge Treating Wastewater
title_full Filamentous Bacteria and Stalked Ciliates for the Stable Structure of Aerobic Granular Sludge Treating Wastewater
title_fullStr Filamentous Bacteria and Stalked Ciliates for the Stable Structure of Aerobic Granular Sludge Treating Wastewater
title_full_unstemmed Filamentous Bacteria and Stalked Ciliates for the Stable Structure of Aerobic Granular Sludge Treating Wastewater
title_short Filamentous Bacteria and Stalked Ciliates for the Stable Structure of Aerobic Granular Sludge Treating Wastewater
title_sort filamentous bacteria and stalked ciliates for the stable structure of aerobic granular sludge treating wastewater
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9735926/
https://www.ncbi.nlm.nih.gov/pubmed/36497821
http://dx.doi.org/10.3390/ijerph192315747
work_keys_str_mv AT liangyifan filamentousbacteriaandstalkedciliatesforthestablestructureofaerobicgranularsludgetreatingwastewater
AT panzengrui filamentousbacteriaandstalkedciliatesforthestablestructureofaerobicgranularsludgetreatingwastewater
AT guotao filamentousbacteriaandstalkedciliatesforthestablestructureofaerobicgranularsludgetreatingwastewater
AT fenghongbo filamentousbacteriaandstalkedciliatesforthestablestructureofaerobicgranularsludgetreatingwastewater
AT yananqi filamentousbacteriaandstalkedciliatesforthestablestructureofaerobicgranularsludgetreatingwastewater
AT niyongjiong filamentousbacteriaandstalkedciliatesforthestablestructureofaerobicgranularsludgetreatingwastewater
AT lijun filamentousbacteriaandstalkedciliatesforthestablestructureofaerobicgranularsludgetreatingwastewater