Effect of continuous and intermittent electric current on lignin wastewater treatment and microbial community structure in electro-microbial system

Abstract In this study, complex structured soluble lignin wastewater was treated by electro-microbial system (EMS) using different direct current (DC) application modes (CR (continuous ON), IR12h (12 h-ON/12 h-OFF) and IR2h (2 h-ON/2 h-OFF)), and physiological characteristics and microbial communiti...

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Autores principales:	Lulu Zhang, Lili Ding, Xuemeng He, Haijun Ma, Huimin Fu, Jinfeng Wang, Hongqiang Ren
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e974975fc14d4c17897c6d8c6fb6382c
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spelling	oai:doaj.org-article:e974975fc14d4c17897c6d8c6fb6382c2021-12-02T15:08:46ZEffect of continuous and intermittent electric current on lignin wastewater treatment and microbial community structure in electro-microbial system10.1038/s41598-018-34379-72045-2322https://doaj.org/article/e974975fc14d4c17897c6d8c6fb6382c2019-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-34379-7https://doaj.org/toc/2045-2322Abstract In this study, complex structured soluble lignin wastewater was treated by electro-microbial system (EMS) using different direct current (DC) application modes (CR (continuous ON), IR12h (12 h-ON/12 h-OFF) and IR2h (2 h-ON/2 h-OFF)), and physiological characteristics and microbial communities were investigated. Results showed that CR, IR12h and IR2h had higher lignin removals, which were almost two times that of the control reactor (R0′, no current), and IR2h performed best and stably. Furthermore, IR2h exhibited the lowest ohmic resistance (Rs) of electrode biofilms, which could be explained by its higher abundance of electroactive bacteria. In the activated sludge of EMS, the concentration of dehydrogenase activity (DHA) and electronic transport system (ETS) in IR2h were the highest (1.48 and 1.28 times of R0′), which contributed to its high content of adenosine triphosphate (ATP). The viability of activated sludge was not affected by different DC application modes. Phospholipid fatty acids (PLFA) analysis indicated that IR2h had the maximum content of C15:1 anteiso A, C16:0 and C18:0; CR increased the content of C15:0 anteiso and decreased the content of saturated fatty acids. Genus-level results revealed that lignin-degrading bacteria, Pseudoxanthomonas and Mycobacterium, could be enriched in IR2h and CR, respectively.Lulu ZhangLili DingXuemeng HeHaijun MaHuimin FuJinfeng WangHongqiang RenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-11 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Lulu Zhang Lili Ding Xuemeng He Haijun Ma Huimin Fu Jinfeng Wang Hongqiang Ren Effect of continuous and intermittent electric current on lignin wastewater treatment and microbial community structure in electro-microbial system
description	Abstract In this study, complex structured soluble lignin wastewater was treated by electro-microbial system (EMS) using different direct current (DC) application modes (CR (continuous ON), IR12h (12 h-ON/12 h-OFF) and IR2h (2 h-ON/2 h-OFF)), and physiological characteristics and microbial communities were investigated. Results showed that CR, IR12h and IR2h had higher lignin removals, which were almost two times that of the control reactor (R0′, no current), and IR2h performed best and stably. Furthermore, IR2h exhibited the lowest ohmic resistance (Rs) of electrode biofilms, which could be explained by its higher abundance of electroactive bacteria. In the activated sludge of EMS, the concentration of dehydrogenase activity (DHA) and electronic transport system (ETS) in IR2h were the highest (1.48 and 1.28 times of R0′), which contributed to its high content of adenosine triphosphate (ATP). The viability of activated sludge was not affected by different DC application modes. Phospholipid fatty acids (PLFA) analysis indicated that IR2h had the maximum content of C15:1 anteiso A, C16:0 and C18:0; CR increased the content of C15:0 anteiso and decreased the content of saturated fatty acids. Genus-level results revealed that lignin-degrading bacteria, Pseudoxanthomonas and Mycobacterium, could be enriched in IR2h and CR, respectively.
format	article
author	Lulu Zhang Lili Ding Xuemeng He Haijun Ma Huimin Fu Jinfeng Wang Hongqiang Ren
author_facet	Lulu Zhang Lili Ding Xuemeng He Haijun Ma Huimin Fu Jinfeng Wang Hongqiang Ren
author_sort	Lulu Zhang
title	Effect of continuous and intermittent electric current on lignin wastewater treatment and microbial community structure in electro-microbial system
title_short	Effect of continuous and intermittent electric current on lignin wastewater treatment and microbial community structure in electro-microbial system
title_full	Effect of continuous and intermittent electric current on lignin wastewater treatment and microbial community structure in electro-microbial system
title_fullStr	Effect of continuous and intermittent electric current on lignin wastewater treatment and microbial community structure in electro-microbial system
title_full_unstemmed	Effect of continuous and intermittent electric current on lignin wastewater treatment and microbial community structure in electro-microbial system
title_sort	effect of continuous and intermittent electric current on lignin wastewater treatment and microbial community structure in electro-microbial system
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/e974975fc14d4c17897c6d8c6fb6382c
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_version_	1718388034192277504

Effect of continuous and intermittent electric current on lignin wastewater treatment and microbial community structure in electro-microbial system

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