Cargando…

Efficient Recovery of Organic Matter from Municipal Wastewater by a High-Rate Membrane Bioreactor Equipped with Flat-Sheet Ceramic Membranes

High-rate processes have been investigated for the recovery of organic matter from municipal wastewater. High-rate membrane bioreactors (HR-MBRs) may simultaneously achieve the increased recovery of carbon and high effluent quality, although control of membrane fouling is extremely difficult. To add...

Descripción completa

Detalles Bibliográficos
Autores principales: Rocco, Michael Joseph, Hafuka, Akira, Tsuchiya, Toru, Kimura, Katsuki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10056867/
https://www.ncbi.nlm.nih.gov/pubmed/36984687
http://dx.doi.org/10.3390/membranes13030300
_version_ 1785016228013670400
author Rocco, Michael Joseph
Hafuka, Akira
Tsuchiya, Toru
Kimura, Katsuki
author_facet Rocco, Michael Joseph
Hafuka, Akira
Tsuchiya, Toru
Kimura, Katsuki
author_sort Rocco, Michael Joseph
collection PubMed
description High-rate processes have been investigated for the recovery of organic matter from municipal wastewater. High-rate membrane bioreactors (HR-MBRs) may simultaneously achieve the increased recovery of carbon and high effluent quality, although control of membrane fouling is extremely difficult. To address the severe fouling in HR-MBRs, the combination of granular scouring and frequent chemically enhanced backwashing was examined. The use of robust flat-sheet ceramic membranes enabled the application of those cleaning strategies. Experiments were carried out at an existing wastewater treatment plant. To operate as a high-rate system, the bioreactor solid residence time and hydraulic residence time were set at 0.5 days and 1.6 h, respectively. Although a relatively high flux of 20 L m(−2) h(−1) was applied, the proposed HR-MBR exhibited a very low fouling rate of 1.3 kPa/day. The system could recover >70% of the carbon from raw wastewater, whereas the concentration of chemical oxygen demand in the effluent was lowered to <20 mg/L. The performance of the proposed HR-MBR observed in this study was clearly superior to those reported in previous related studies.
format Online
Article
Text
id pubmed-10056867
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-100568672023-03-30 Efficient Recovery of Organic Matter from Municipal Wastewater by a High-Rate Membrane Bioreactor Equipped with Flat-Sheet Ceramic Membranes Rocco, Michael Joseph Hafuka, Akira Tsuchiya, Toru Kimura, Katsuki Membranes (Basel) Article High-rate processes have been investigated for the recovery of organic matter from municipal wastewater. High-rate membrane bioreactors (HR-MBRs) may simultaneously achieve the increased recovery of carbon and high effluent quality, although control of membrane fouling is extremely difficult. To address the severe fouling in HR-MBRs, the combination of granular scouring and frequent chemically enhanced backwashing was examined. The use of robust flat-sheet ceramic membranes enabled the application of those cleaning strategies. Experiments were carried out at an existing wastewater treatment plant. To operate as a high-rate system, the bioreactor solid residence time and hydraulic residence time were set at 0.5 days and 1.6 h, respectively. Although a relatively high flux of 20 L m(−2) h(−1) was applied, the proposed HR-MBR exhibited a very low fouling rate of 1.3 kPa/day. The system could recover >70% of the carbon from raw wastewater, whereas the concentration of chemical oxygen demand in the effluent was lowered to <20 mg/L. The performance of the proposed HR-MBR observed in this study was clearly superior to those reported in previous related studies. MDPI 2023-03-03 /pmc/articles/PMC10056867/ /pubmed/36984687 http://dx.doi.org/10.3390/membranes13030300 Text en © 2023 by the authors. 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
Rocco, Michael Joseph
Hafuka, Akira
Tsuchiya, Toru
Kimura, Katsuki
Efficient Recovery of Organic Matter from Municipal Wastewater by a High-Rate Membrane Bioreactor Equipped with Flat-Sheet Ceramic Membranes
title Efficient Recovery of Organic Matter from Municipal Wastewater by a High-Rate Membrane Bioreactor Equipped with Flat-Sheet Ceramic Membranes
title_full Efficient Recovery of Organic Matter from Municipal Wastewater by a High-Rate Membrane Bioreactor Equipped with Flat-Sheet Ceramic Membranes
title_fullStr Efficient Recovery of Organic Matter from Municipal Wastewater by a High-Rate Membrane Bioreactor Equipped with Flat-Sheet Ceramic Membranes
title_full_unstemmed Efficient Recovery of Organic Matter from Municipal Wastewater by a High-Rate Membrane Bioreactor Equipped with Flat-Sheet Ceramic Membranes
title_short Efficient Recovery of Organic Matter from Municipal Wastewater by a High-Rate Membrane Bioreactor Equipped with Flat-Sheet Ceramic Membranes
title_sort efficient recovery of organic matter from municipal wastewater by a high-rate membrane bioreactor equipped with flat-sheet ceramic membranes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10056867/
https://www.ncbi.nlm.nih.gov/pubmed/36984687
http://dx.doi.org/10.3390/membranes13030300
work_keys_str_mv AT roccomichaeljoseph efficientrecoveryoforganicmatterfrommunicipalwastewaterbyahighratemembranebioreactorequippedwithflatsheetceramicmembranes
AT hafukaakira efficientrecoveryoforganicmatterfrommunicipalwastewaterbyahighratemembranebioreactorequippedwithflatsheetceramicmembranes
AT tsuchiyatoru efficientrecoveryoforganicmatterfrommunicipalwastewaterbyahighratemembranebioreactorequippedwithflatsheetceramicmembranes
AT kimurakatsuki efficientrecoveryoforganicmatterfrommunicipalwastewaterbyahighratemembranebioreactorequippedwithflatsheetceramicmembranes