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27-03-2024 | Original Paper

Performance of a novel hybrid membrane bioreactor (HMBR) treating synthetic dairy wastewater: assessment of coupled mechanical removal sections and MBR

Authors: Milad Vaezi, Salar Helchi, Farshid Pajoum Shariati, Mir Mehrshad Emamshoushtari, Mahsa Keyvan Hosseini, Parisa Keyvan Hosseini, Delara Daliri

Published in: Clean Technologies and Environmental Policy

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Abstract

In this study, a novel mechanical hybrid membrane bioreactor (HMBR) was designed and constructed to treat synthetic dairy wastewater. The system integrated mechanical oil separators, including API (published by the American Petroleum Institute), corrugated plate interceptor (CPI), and membrane bioreactor (MBR) technology, to investigate the oil removal efficiency during the separation processes. The optimal diagonal plate angle in the CPI section was determined to be 30°, achieving an oil removal efficiency exceeding 30% for the initial oil concentrations of 200, 400, and 800 mg L−1. Subsequently, trials were conducted in HMBR, utilizing an initial oil concentration, chemical oxygen demand (COD), and plate angle of 800, 4000  mg L−1, and 30°, respectively. After the mechanical pre-treatment section, the initial oil content was 501 mg L−1 and decreased to 9 mg L−1 in the membrane permeate. Additionally, the COD in the effluent of the mechanical pre-treatment section ranged from 2639 to 2849 mg L−1, which decreased to 169–387 mg L−1 in the membrane permeate. Finally, the HMBR system demonstrated removal efficiencies of 98.8% for oil and 90–95.7% for COD. The HMBR showed efficient removal of oil and COD despite the challenging characteristics of dairy wastewater, including its high oil and organic content. Integrating mechanical separation, biodegradation, and membrane filtration highlights the potential of this system for cost-effective and eco-friendly dairy wastewater treatment. This integration addresses the need for comprehensive studies examining mechanical pre-treatment methods integrated with MBR technology for dairy wastewater treatment in a compact system.

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Metadata
Title
Performance of a novel hybrid membrane bioreactor (HMBR) treating synthetic dairy wastewater: assessment of coupled mechanical removal sections and MBR
Authors
Milad Vaezi
Salar Helchi
Farshid Pajoum Shariati
Mir Mehrshad Emamshoushtari
Mahsa Keyvan Hosseini
Parisa Keyvan Hosseini
Delara Daliri
Publication date
27-03-2024
Publisher
Springer Berlin Heidelberg
Published in
Clean Technologies and Environmental Policy
Print ISSN: 1618-954X
Electronic ISSN: 1618-9558
DOI
https://doi.org/10.1007/s10098-024-02801-6