Impact of different inoculum sources on the performance of membrane bioreactors for municipal wastewater treatment: Dynamic membrane versus ultrafiltration membrane

Onur Isik; Ali Izzet Cengiz; Amr Mustafa Abdelrahman; Kadir Ozcelik; Ayse Yuksekdag; Ismail Koyuncu; Mustafa Evren Ersahin; Hale Ozgun; Ibrahim Demir

doi:10.1016/j.jwpe.2021.102549

Impact of different inoculum sources on the performance of membrane bioreactors for municipal wastewater treatment: Dynamic membrane versus ultrafiltration membrane

Onur Isik^*, Ali Izzet Cengiz, Amr Mustafa Abdelrahman, Kadir Ozcelik, Ayse Yuksekdag, Ismail Koyuncu, Mustafa Evren Ersahin, Hale Ozgun, Ibrahim Demir

^*Corresponding author for this work

Department of Environmental Engineering

Istanbul Technical University

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

In this study, impact of different inoculum on the performance of membrane bioreactors (MBRs) was investigated for municipal wastewater treatment. Waste sludges from a conventional activated sludge (CAS) system and a high-rate activated sludge (HRAS) system were used as inoculums at Stage-1 and Stage-2, respectively. A commercial ultrafiltration (UF) membrane was tested in parallel with a low-cost polyester hollow fiber support material (dynamic membrane, DM). UF and DM membranes were operated for 67 days at a flux of 8 L/m²·h at each stage. High chemical oxygen demand (COD) and soluble COD (sCOD) removal efficiencies (>86% and >74%, respectively), low mixed liquor suspended solids (MLSS) concentration (<10 mg/L), and low turbidity values were achieved in permeates at each stage. Extracellular polymeric substances (EPS) content was higher at Stage-1, which caused an increase in sludge resistance to filtration (SRF) and sludge volume index (SVI). Based on morphological analysis, compact dynamic cake layer was formed on the support material at Stage-1, while porous dynamic layer was formed at Stage-2. Thus, DM was operated at lower TMP at Stage-2. Based on the results obtained from the study, sludge from HRAS system showed better performance as inoculum compared to the sludge from CAS system for DM applications.

Original language	English
Article number	102549
Journal	Journal of Water Process Engineering
Volume	46
DOIs	https://doi.org/10.1016/j.jwpe.2021.102549
Publication status	Published - Apr 2022

Bibliographical note

Publisher Copyright:
© 2021

Funding

This study was financed by Istanbul Technical University , Scientific Research Projects: Ali Izzet Cengiz (Project No: MYL-2021-42988 ) and Onur Isik (Project No: MKD-2017-40987 ). The authors would like to express their gratitude for the financial and technical support provided by MEM-TEK National Research Center on Membrane Technologies .

Funders	Funder number
Ali Izzet Cengiz	MYL-2021-42988, MKD-2017-40987
Istanbul Teknik Üniversitesi

Keywords

Dynamic membrane
Hollow fiber
Inoculum sludge
Membrane bioreactor
Municipal wastewater

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jwpe.2021.102549

Cite this

Isik, O., Cengiz, A. I., Abdelrahman, A. M., Ozcelik, K., Yuksekdag, A., Koyuncu, I., Ersahin, M. E., Ozgun, H., & Demir, I. (2022). Impact of different inoculum sources on the performance of membrane bioreactors for municipal wastewater treatment: Dynamic membrane versus ultrafiltration membrane. Journal of Water Process Engineering, 46, Article 102549. https://doi.org/10.1016/j.jwpe.2021.102549

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abstract = "In this study, impact of different inoculum on the performance of membrane bioreactors (MBRs) was investigated for municipal wastewater treatment. Waste sludges from a conventional activated sludge (CAS) system and a high-rate activated sludge (HRAS) system were used as inoculums at Stage-1 and Stage-2, respectively. A commercial ultrafiltration (UF) membrane was tested in parallel with a low-cost polyester hollow fiber support material (dynamic membrane, DM). UF and DM membranes were operated for 67 days at a flux of 8 L/m2·h at each stage. High chemical oxygen demand (COD) and soluble COD (sCOD) removal efficiencies (>86% and >74%, respectively), low mixed liquor suspended solids (MLSS) concentration (<10 mg/L), and low turbidity values were achieved in permeates at each stage. Extracellular polymeric substances (EPS) content was higher at Stage-1, which caused an increase in sludge resistance to filtration (SRF) and sludge volume index (SVI). Based on morphological analysis, compact dynamic cake layer was formed on the support material at Stage-1, while porous dynamic layer was formed at Stage-2. Thus, DM was operated at lower TMP at Stage-2. Based on the results obtained from the study, sludge from HRAS system showed better performance as inoculum compared to the sludge from CAS system for DM applications.",

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Isik, O , Cengiz, AI, Abdelrahman, AM, Ozcelik, K , Yuksekdag, A , Koyuncu, I , Ersahin, ME , Ozgun, H & Demir, I 2022, 'Impact of different inoculum sources on the performance of membrane bioreactors for municipal wastewater treatment: Dynamic membrane versus ultrafiltration membrane', Journal of Water Process Engineering, vol. 46, 102549. https://doi.org/10.1016/j.jwpe.2021.102549

TY - JOUR

T1 - Impact of different inoculum sources on the performance of membrane bioreactors for municipal wastewater treatment

T2 - Dynamic membrane versus ultrafiltration membrane

AU - Isik, Onur

AU - Cengiz, Ali Izzet

AU - Abdelrahman, Amr Mustafa

AU - Ozcelik, Kadir

AU - Yuksekdag, Ayse

AU - Koyuncu, Ismail

AU - Ersahin, Mustafa Evren

AU - Ozgun, Hale

AU - Demir, Ibrahim

PY - 2022/4

Y1 - 2022/4

N2 - In this study, impact of different inoculum on the performance of membrane bioreactors (MBRs) was investigated for municipal wastewater treatment. Waste sludges from a conventional activated sludge (CAS) system and a high-rate activated sludge (HRAS) system were used as inoculums at Stage-1 and Stage-2, respectively. A commercial ultrafiltration (UF) membrane was tested in parallel with a low-cost polyester hollow fiber support material (dynamic membrane, DM). UF and DM membranes were operated for 67 days at a flux of 8 L/m2·h at each stage. High chemical oxygen demand (COD) and soluble COD (sCOD) removal efficiencies (>86% and >74%, respectively), low mixed liquor suspended solids (MLSS) concentration (<10 mg/L), and low turbidity values were achieved in permeates at each stage. Extracellular polymeric substances (EPS) content was higher at Stage-1, which caused an increase in sludge resistance to filtration (SRF) and sludge volume index (SVI). Based on morphological analysis, compact dynamic cake layer was formed on the support material at Stage-1, while porous dynamic layer was formed at Stage-2. Thus, DM was operated at lower TMP at Stage-2. Based on the results obtained from the study, sludge from HRAS system showed better performance as inoculum compared to the sludge from CAS system for DM applications.

AB - In this study, impact of different inoculum on the performance of membrane bioreactors (MBRs) was investigated for municipal wastewater treatment. Waste sludges from a conventional activated sludge (CAS) system and a high-rate activated sludge (HRAS) system were used as inoculums at Stage-1 and Stage-2, respectively. A commercial ultrafiltration (UF) membrane was tested in parallel with a low-cost polyester hollow fiber support material (dynamic membrane, DM). UF and DM membranes were operated for 67 days at a flux of 8 L/m2·h at each stage. High chemical oxygen demand (COD) and soluble COD (sCOD) removal efficiencies (>86% and >74%, respectively), low mixed liquor suspended solids (MLSS) concentration (<10 mg/L), and low turbidity values were achieved in permeates at each stage. Extracellular polymeric substances (EPS) content was higher at Stage-1, which caused an increase in sludge resistance to filtration (SRF) and sludge volume index (SVI). Based on morphological analysis, compact dynamic cake layer was formed on the support material at Stage-1, while porous dynamic layer was formed at Stage-2. Thus, DM was operated at lower TMP at Stage-2. Based on the results obtained from the study, sludge from HRAS system showed better performance as inoculum compared to the sludge from CAS system for DM applications.

KW - Dynamic membrane

KW - Hollow fiber

KW - Inoculum sludge

KW - Membrane bioreactor

KW - Municipal wastewater

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DO - 10.1016/j.jwpe.2021.102549

M3 - Article

AN - SCOPUS:85122324451

SN - 2214-7144

VL - 46

JO - Journal of Water Process Engineering

JF - Journal of Water Process Engineering

M1 - 102549

ER -

Impact of different inoculum sources on the performance of membrane bioreactors for municipal wastewater treatment: Dynamic membrane versus ultrafiltration membrane

Abstract

Bibliographical note

Funding

Keywords

UN SDGs

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