Testing of a novel IFAS-MBR process with co-precipitation

IFAS-MBR with co-precipitation, not yet commonly used in practice, will result in a very compact process for nutrient removal. The process, based on a combined pre- and post-denitrification IFAS process with membrane separation (IFAS-MBR), was tested in two parallel small-scale plants. Train A was o...

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Autores principales:	B. Rusten, S. S. Rathnaweera, L. D. Manamperuma, M. Kjeverud, H. Ødegaard
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	biofilm control co-precipitation ifas-mbr municipal wastewater nitrogen removal phosphorus removal Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/3a40fe3c2e3f45b9b8acf196eb7dadb6
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spelling	oai:doaj.org-article:3a40fe3c2e3f45b9b8acf196eb7dadb62021-11-05T21:16:38ZTesting of a novel IFAS-MBR process with co-precipitation1751-231X10.2166/wpt.2021.054https://doaj.org/article/3a40fe3c2e3f45b9b8acf196eb7dadb62021-10-01T00:00:00Zhttp://wpt.iwaponline.com/content/16/4/1091https://doaj.org/toc/1751-231XIFAS-MBR with co-precipitation, not yet commonly used in practice, will result in a very compact process for nutrient removal. The process, based on a combined pre- and post-denitrification IFAS process with membrane separation (IFAS-MBR), was tested in two parallel small-scale plants. Train A was operated with co-precipitation in order to achieve high removal of total P (TP). Train B, without co-precipitation, served as a control. Due to the coagulant (Al) addition, the concern was precipitation on the biofilm carriers in the aerobic reactor in Train A. A small internal air-lift pump proved to be very efficient in controlling biofilm thickness and removing excess biofilm mass as needed. A coagulant dose equivalent to an Al/TP molar ratio of 1.9 was necessary to achieve 99% TP removal and 0.10 mg TP/l in the effluent of Train A. Very good removal of total N was achieved in both trains. Train A had a biofilm nitrification rate of 0.65 g NH4-N/m2d at 12–13 °C and 5.2–5.6 mg O2/l. The tests demonstrated that an IFAS-MBR process with co-precipitation and an aerobic suspended biomass SRT of 5–10 days is feasible, and that all the performance goals set up for the full-scale plant were achieved. HIGHLIGHTS IFAS-MBR with co-precipitation and combined pre- and post-denitrification for removal of P and N from wastewater.; Removal of 95% COD, 80% N, 100% SS and 99% P at a dose of 1.9 mol Al/mol P.; Air-lift pump to control the biofilm biomass and optimize nitrification on the biofilm carriers in the IFAS reactor.; IFAS-MBR process worked well at suspended biomass aerobic SRTs of 5–10 d.;B. RustenS. S. RathnaweeraL. D. ManamperumaM. KjeverudH. ØdegaardIWA Publishingarticlebiofilm controlco-precipitationifas-mbrmunicipal wastewaternitrogen removalphosphorus removalEnvironmental technology. Sanitary engineeringTD1-1066ENWater Practice and Technology, Vol 16, Iss 4, Pp 1091-1107 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biofilm control co-precipitation ifas-mbr municipal wastewater nitrogen removal phosphorus removal Environmental technology. Sanitary engineering TD1-1066
spellingShingle	biofilm control co-precipitation ifas-mbr municipal wastewater nitrogen removal phosphorus removal Environmental technology. Sanitary engineering TD1-1066 B. Rusten S. S. Rathnaweera L. D. Manamperuma M. Kjeverud H. Ødegaard Testing of a novel IFAS-MBR process with co-precipitation
description	IFAS-MBR with co-precipitation, not yet commonly used in practice, will result in a very compact process for nutrient removal. The process, based on a combined pre- and post-denitrification IFAS process with membrane separation (IFAS-MBR), was tested in two parallel small-scale plants. Train A was operated with co-precipitation in order to achieve high removal of total P (TP). Train B, without co-precipitation, served as a control. Due to the coagulant (Al) addition, the concern was precipitation on the biofilm carriers in the aerobic reactor in Train A. A small internal air-lift pump proved to be very efficient in controlling biofilm thickness and removing excess biofilm mass as needed. A coagulant dose equivalent to an Al/TP molar ratio of 1.9 was necessary to achieve 99% TP removal and 0.10 mg TP/l in the effluent of Train A. Very good removal of total N was achieved in both trains. Train A had a biofilm nitrification rate of 0.65 g NH4-N/m2d at 12–13 °C and 5.2–5.6 mg O2/l. The tests demonstrated that an IFAS-MBR process with co-precipitation and an aerobic suspended biomass SRT of 5–10 days is feasible, and that all the performance goals set up for the full-scale plant were achieved. HIGHLIGHTS IFAS-MBR with co-precipitation and combined pre- and post-denitrification for removal of P and N from wastewater.; Removal of 95% COD, 80% N, 100% SS and 99% P at a dose of 1.9 mol Al/mol P.; Air-lift pump to control the biofilm biomass and optimize nitrification on the biofilm carriers in the IFAS reactor.; IFAS-MBR process worked well at suspended biomass aerobic SRTs of 5–10 d.;
format	article
author	B. Rusten S. S. Rathnaweera L. D. Manamperuma M. Kjeverud H. Ødegaard
author_facet	B. Rusten S. S. Rathnaweera L. D. Manamperuma M. Kjeverud H. Ødegaard
author_sort	B. Rusten
title	Testing of a novel IFAS-MBR process with co-precipitation
title_short	Testing of a novel IFAS-MBR process with co-precipitation
title_full	Testing of a novel IFAS-MBR process with co-precipitation
title_fullStr	Testing of a novel IFAS-MBR process with co-precipitation
title_full_unstemmed	Testing of a novel IFAS-MBR process with co-precipitation
title_sort	testing of a novel ifas-mbr process with co-precipitation
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/3a40fe3c2e3f45b9b8acf196eb7dadb6
work_keys_str_mv	AT brusten testingofanovelifasmbrprocesswithcoprecipitation AT ssrathnaweera testingofanovelifasmbrprocesswithcoprecipitation AT ldmanamperuma testingofanovelifasmbrprocesswithcoprecipitation AT mkjeverud testingofanovelifasmbrprocesswithcoprecipitation AT hødegaard testingofanovelifasmbrprocesswithcoprecipitation
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Testing of a novel IFAS-MBR process with co-precipitation

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