Membrane fouling induced by AHL-mediated soluble microbial product (SMP) formation by fouling-causing bacteria co-cultured with fouling-enhancing bacteria

Abstract Membrane fouling still remains a major obstacle for wider applications of membrane bioreactor (MBR), which is mainly caused by soluble microbial products (SMP). Identification of key bacteria responsible for SMP production is essential for mitigation of membrane fouling. Here, we investigat...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	So Ishizaki, Ryoichi Sugiyama, Satoshi Okabe
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/66ce3a5ab73741deb3c6e3e47333037f
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:66ce3a5ab73741deb3c6e3e47333037f
record_format	dspace
spelling	oai:doaj.org-article:66ce3a5ab73741deb3c6e3e47333037f2021-12-02T16:06:37ZMembrane fouling induced by AHL-mediated soluble microbial product (SMP) formation by fouling-causing bacteria co-cultured with fouling-enhancing bacteria10.1038/s41598-017-09023-52045-2322https://doaj.org/article/66ce3a5ab73741deb3c6e3e47333037f2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09023-5https://doaj.org/toc/2045-2322Abstract Membrane fouling still remains a major obstacle for wider applications of membrane bioreactor (MBR), which is mainly caused by soluble microbial products (SMP). Identification of key bacteria responsible for SMP production is essential for mitigation of membrane fouling. Here, we investigated the effect of microbial interaction on membrane fouling. We measured the membrane fouling potentials of 13 bacterial strains isolated from a pilot-scale MBR treating domestic wastewater when they were cultivated as single-culture and co-culture. We found that fouling-causing bacteria (FCB) displayed much higher fouling potential when co-cultured even with non-FCB and mixed population (activated sludge). In particular, the fouling potential of strain S26, one of FCB, increased 26.8 times when cultivated with strain S22 (fouling-enhancing bacteria, FEB). The secretion of N-octanoyl-L-homoserine lactone (C8-HSL) was increased by co-cultivating S22 and S26 as compared with cultivating as single culture, which stimulated the production of fouling-causing SMP by S26 and consequently resulted in severe membrane fouling. This result suggests that AHL-mediated quorum-sensing (QS) regulatory system was involved in secretion of fouling-causing SMP.So IshizakiRyoichi SugiyamaSatoshi OkabeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q So Ishizaki Ryoichi Sugiyama Satoshi Okabe Membrane fouling induced by AHL-mediated soluble microbial product (SMP) formation by fouling-causing bacteria co-cultured with fouling-enhancing bacteria
description	Abstract Membrane fouling still remains a major obstacle for wider applications of membrane bioreactor (MBR), which is mainly caused by soluble microbial products (SMP). Identification of key bacteria responsible for SMP production is essential for mitigation of membrane fouling. Here, we investigated the effect of microbial interaction on membrane fouling. We measured the membrane fouling potentials of 13 bacterial strains isolated from a pilot-scale MBR treating domestic wastewater when they were cultivated as single-culture and co-culture. We found that fouling-causing bacteria (FCB) displayed much higher fouling potential when co-cultured even with non-FCB and mixed population (activated sludge). In particular, the fouling potential of strain S26, one of FCB, increased 26.8 times when cultivated with strain S22 (fouling-enhancing bacteria, FEB). The secretion of N-octanoyl-L-homoserine lactone (C8-HSL) was increased by co-cultivating S22 and S26 as compared with cultivating as single culture, which stimulated the production of fouling-causing SMP by S26 and consequently resulted in severe membrane fouling. This result suggests that AHL-mediated quorum-sensing (QS) regulatory system was involved in secretion of fouling-causing SMP.
format	article
author	So Ishizaki Ryoichi Sugiyama Satoshi Okabe
author_facet	So Ishizaki Ryoichi Sugiyama Satoshi Okabe
author_sort	So Ishizaki
title	Membrane fouling induced by AHL-mediated soluble microbial product (SMP) formation by fouling-causing bacteria co-cultured with fouling-enhancing bacteria
title_short	Membrane fouling induced by AHL-mediated soluble microbial product (SMP) formation by fouling-causing bacteria co-cultured with fouling-enhancing bacteria
title_full	Membrane fouling induced by AHL-mediated soluble microbial product (SMP) formation by fouling-causing bacteria co-cultured with fouling-enhancing bacteria
title_fullStr	Membrane fouling induced by AHL-mediated soluble microbial product (SMP) formation by fouling-causing bacteria co-cultured with fouling-enhancing bacteria
title_full_unstemmed	Membrane fouling induced by AHL-mediated soluble microbial product (SMP) formation by fouling-causing bacteria co-cultured with fouling-enhancing bacteria
title_sort	membrane fouling induced by ahl-mediated soluble microbial product (smp) formation by fouling-causing bacteria co-cultured with fouling-enhancing bacteria
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/66ce3a5ab73741deb3c6e3e47333037f
work_keys_str_mv	AT soishizaki membranefoulinginducedbyahlmediatedsolublemicrobialproductsmpformationbyfoulingcausingbacteriacoculturedwithfoulingenhancingbacteria AT ryoichisugiyama membranefoulinginducedbyahlmediatedsolublemicrobialproductsmpformationbyfoulingcausingbacteriacoculturedwithfoulingenhancingbacteria AT satoshiokabe membranefoulinginducedbyahlmediatedsolublemicrobialproductsmpformationbyfoulingcausingbacteriacoculturedwithfoulingenhancingbacteria
_version_	1718384963788734464

Membrane fouling induced by AHL-mediated soluble microbial product (SMP) formation by fouling-causing bacteria co-cultured with fouling-enhancing bacteria

Ejemplares similares