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Anoxic Treatment of Agricultural Drainage Water in a Venturi-Integrated Membrane Bioreactor

Due to low sludge production and being a clean source without residuals, hydrogen-based autotrophic denitrification appears to be a promising choice for nitrate removal from agricultural drainage waters or water/wastewater with a similar composition. Although the incorporation of hydrogen-based auto...

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Autor principal: Kayaalp, Necati
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10385815/
https://www.ncbi.nlm.nih.gov/pubmed/37505031
http://dx.doi.org/10.3390/membranes13070666
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author Kayaalp, Necati
author_facet Kayaalp, Necati
author_sort Kayaalp, Necati
collection PubMed
description Due to low sludge production and being a clean source without residuals, hydrogen-based autotrophic denitrification appears to be a promising choice for nitrate removal from agricultural drainage waters or water/wastewater with a similar composition. Although the incorporation of hydrogen-based autotrophic denitrification with membrane bioreactors (MBRs) enabled almost 100% utilization of hydrogen, the technology still needs to be improved to better utilize its advantages. This study investigated the anoxic treatment of both synthetic and real drainage waters using hydrogen gas in a recently developed membrane bioreactor configuration, a venturi-integrated submerged membrane bioreactor, for the first time. The study examined the effects of the inflow nitrate concentration, and the use of a venturi device on the removal efficiency, as well as the effects of the presence of headspace gas circulation and circulation rate on membrane fouling. The study found that using the headspace gas circulation through a venturi device did not significantly affect the treatment efficiency, and in both cases, a removal efficiency of over 90% was achieved. When the inlet [Formula: see text] concentration was increased from 50 mg/L to 100 mg/L, the maximum removal efficiency decreased from 98% to 92%. It was observed that the most significant effect of the headspace gas circulation was on the membrane fouling. When the headspace gas was not circulated, the average membrane chemical washing period was 5 days. However, with headspace gas circulation, the membrane washing period increased to an average of 12 days. The study found that the headspace gas circulation method significantly affected membrane fouling. When the upper phase was circulated with a peristaltic pump instead of a venturi device, the membrane washing period decreased to one day. The study calculated the maximum hydrogen utilization efficiency to be approximately 96%.
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spelling pubmed-103858152023-07-30 Anoxic Treatment of Agricultural Drainage Water in a Venturi-Integrated Membrane Bioreactor Kayaalp, Necati Membranes (Basel) Article Due to low sludge production and being a clean source without residuals, hydrogen-based autotrophic denitrification appears to be a promising choice for nitrate removal from agricultural drainage waters or water/wastewater with a similar composition. Although the incorporation of hydrogen-based autotrophic denitrification with membrane bioreactors (MBRs) enabled almost 100% utilization of hydrogen, the technology still needs to be improved to better utilize its advantages. This study investigated the anoxic treatment of both synthetic and real drainage waters using hydrogen gas in a recently developed membrane bioreactor configuration, a venturi-integrated submerged membrane bioreactor, for the first time. The study examined the effects of the inflow nitrate concentration, and the use of a venturi device on the removal efficiency, as well as the effects of the presence of headspace gas circulation and circulation rate on membrane fouling. The study found that using the headspace gas circulation through a venturi device did not significantly affect the treatment efficiency, and in both cases, a removal efficiency of over 90% was achieved. When the inlet [Formula: see text] concentration was increased from 50 mg/L to 100 mg/L, the maximum removal efficiency decreased from 98% to 92%. It was observed that the most significant effect of the headspace gas circulation was on the membrane fouling. When the headspace gas was not circulated, the average membrane chemical washing period was 5 days. However, with headspace gas circulation, the membrane washing period increased to an average of 12 days. The study found that the headspace gas circulation method significantly affected membrane fouling. When the upper phase was circulated with a peristaltic pump instead of a venturi device, the membrane washing period decreased to one day. The study calculated the maximum hydrogen utilization efficiency to be approximately 96%. MDPI 2023-07-14 /pmc/articles/PMC10385815/ /pubmed/37505031 http://dx.doi.org/10.3390/membranes13070666 Text en © 2023 by the author. 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
Kayaalp, Necati
Anoxic Treatment of Agricultural Drainage Water in a Venturi-Integrated Membrane Bioreactor
title Anoxic Treatment of Agricultural Drainage Water in a Venturi-Integrated Membrane Bioreactor
title_full Anoxic Treatment of Agricultural Drainage Water in a Venturi-Integrated Membrane Bioreactor
title_fullStr Anoxic Treatment of Agricultural Drainage Water in a Venturi-Integrated Membrane Bioreactor
title_full_unstemmed Anoxic Treatment of Agricultural Drainage Water in a Venturi-Integrated Membrane Bioreactor
title_short Anoxic Treatment of Agricultural Drainage Water in a Venturi-Integrated Membrane Bioreactor
title_sort anoxic treatment of agricultural drainage water in a venturi-integrated membrane bioreactor
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10385815/
https://www.ncbi.nlm.nih.gov/pubmed/37505031
http://dx.doi.org/10.3390/membranes13070666
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