Impact of microbial activity on the performance of planted and unplanted wetland at laboratory scale

Three horizontal subsurface flow constructed wetland prototypes were set up to identify and understand the role of microflora in nutrient removal under diverse operating conditions. Out of three setups, one setup served as a control (without plants), and the rest were planted with Typha domingensis....

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Autores principales:	Priyanka Jamwal, Shahana Shirin
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	hssf-cw hydraulic loading rates (hlr) microflora typha domingensis wastewater treatment Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/396df5a46b7c4b41a490cc49e8fee799
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spelling	oai:doaj.org-article:396df5a46b7c4b41a490cc49e8fee7992021-11-05T21:09:01ZImpact of microbial activity on the performance of planted and unplanted wetland at laboratory scale1751-231X10.2166/wpt.2021.017https://doaj.org/article/396df5a46b7c4b41a490cc49e8fee7992021-04-01T00:00:00Zhttp://wpt.iwaponline.com/content/16/2/472https://doaj.org/toc/1751-231XThree horizontal subsurface flow constructed wetland prototypes were set up to identify and understand the role of microflora in nutrient removal under diverse operating conditions. Out of three setups, one setup served as a control (without plants), and the rest were planted with Typha domingensis. The setups were operated at two different hydraulic loading rates (5 cm/day and 16 cm/day) for two months each. Among 27 bacteria species isolated, 80% of nitrate-reducing bacteria were observed in control, and 50–77% of nitrate-reducing bacteria were observed in the plant setups. Presence of diverse denitrifying bacteria and soil organic carbon contributed to high Nitrate-N removal in the control at both HLRs. Similar Ammonium-N (29%) and Ortho-P removal (30%) efficiency was observed at both HLRs in the control setup. Processes such as chemical sorption and adsorption dominated the Ammonium-N and Ortho-P removal in the control setup. High average Ammonium-N removal efficiency of 89% and 52% was observed in plant setups at 5 cm/day and 16 cm/day HLR. At low HLR, Ammonium-N removal in plant setups was dominated by nutrient uptake. In the plant setups, 35% and 15% Ortho-P removal efficiency was observed at low HLR (5 cm/day) and high HLR (16 cm/day) respectively. Hydraulic Retention Time (HRT) limited the uptake of ortho-P, thereby allowing mineralised phosphorus to escape the system without being absorbed by the plants. Highlights At low HLR, Ammonium-N removal in CWs systems is dominated by plant uptake.; Unplanted CW systems are efficient in removing Nitrate-N. Removal mechanism is dominated by the presence of diverse denitrifiers and organic carbon present in soil media.; Ortho-P removal is dominated by physical processes in unplanted CW systems. In planted systems, Phosphorus mineralization leads to poor Ortho-P removal at high HLR.;Priyanka JamwalShahana ShirinIWA Publishingarticlehssf-cwhydraulic loading rates (hlr)microfloratypha domingensiswastewater treatmentEnvironmental technology. Sanitary engineeringTD1-1066ENWater Practice and Technology, Vol 16, Iss 2, Pp 472-489 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	hssf-cw hydraulic loading rates (hlr) microflora typha domingensis wastewater treatment Environmental technology. Sanitary engineering TD1-1066
spellingShingle	hssf-cw hydraulic loading rates (hlr) microflora typha domingensis wastewater treatment Environmental technology. Sanitary engineering TD1-1066 Priyanka Jamwal Shahana Shirin Impact of microbial activity on the performance of planted and unplanted wetland at laboratory scale
description	Three horizontal subsurface flow constructed wetland prototypes were set up to identify and understand the role of microflora in nutrient removal under diverse operating conditions. Out of three setups, one setup served as a control (without plants), and the rest were planted with Typha domingensis. The setups were operated at two different hydraulic loading rates (5 cm/day and 16 cm/day) for two months each. Among 27 bacteria species isolated, 80% of nitrate-reducing bacteria were observed in control, and 50–77% of nitrate-reducing bacteria were observed in the plant setups. Presence of diverse denitrifying bacteria and soil organic carbon contributed to high Nitrate-N removal in the control at both HLRs. Similar Ammonium-N (29%) and Ortho-P removal (30%) efficiency was observed at both HLRs in the control setup. Processes such as chemical sorption and adsorption dominated the Ammonium-N and Ortho-P removal in the control setup. High average Ammonium-N removal efficiency of 89% and 52% was observed in plant setups at 5 cm/day and 16 cm/day HLR. At low HLR, Ammonium-N removal in plant setups was dominated by nutrient uptake. In the plant setups, 35% and 15% Ortho-P removal efficiency was observed at low HLR (5 cm/day) and high HLR (16 cm/day) respectively. Hydraulic Retention Time (HRT) limited the uptake of ortho-P, thereby allowing mineralised phosphorus to escape the system without being absorbed by the plants. Highlights At low HLR, Ammonium-N removal in CWs systems is dominated by plant uptake.; Unplanted CW systems are efficient in removing Nitrate-N. Removal mechanism is dominated by the presence of diverse denitrifiers and organic carbon present in soil media.; Ortho-P removal is dominated by physical processes in unplanted CW systems. In planted systems, Phosphorus mineralization leads to poor Ortho-P removal at high HLR.;
format	article
author	Priyanka Jamwal Shahana Shirin
author_facet	Priyanka Jamwal Shahana Shirin
author_sort	Priyanka Jamwal
title	Impact of microbial activity on the performance of planted and unplanted wetland at laboratory scale
title_short	Impact of microbial activity on the performance of planted and unplanted wetland at laboratory scale
title_full	Impact of microbial activity on the performance of planted and unplanted wetland at laboratory scale
title_fullStr	Impact of microbial activity on the performance of planted and unplanted wetland at laboratory scale
title_full_unstemmed	Impact of microbial activity on the performance of planted and unplanted wetland at laboratory scale
title_sort	impact of microbial activity on the performance of planted and unplanted wetland at laboratory scale
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/396df5a46b7c4b41a490cc49e8fee799
work_keys_str_mv	AT priyankajamwal impactofmicrobialactivityontheperformanceofplantedandunplantedwetlandatlaboratoryscale AT shahanashirin impactofmicrobialactivityontheperformanceofplantedandunplantedwetlandatlaboratoryscale
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Impact of microbial activity on the performance of planted and unplanted wetland at laboratory scale

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