Özet
Uncontrolled discharge of textile industry wastewater, defined by its highly toxic content, causes serious problems in receiving environment. Especially nitrogen-derived pollutants in wastewater threaten the ecosystem and aquatic life. Separate or simultaneous nitrification/denitrification is the preferred biological processes for removing nitrogen-based pollutants from wastewater. This study aimed to evaluate the impact of aeration on/off cycle durations on organic matter, color, and nitrogen removal performances in an intermittently aerated membrane bioreactor (MBR) receiving real textile wastewater. For this purpose, the MBR was operated under different dissolved oxygen concentrations (6 and 3 mg/L) and the aeration on/off cycle durations (from 2 min/2 min to 90 min/360 min) at a constant flux of 10 L/(m2.h). While the chemical oxygen demand (COD) removal performance ranged from 84 to 91 %, the color removal efficiencies were highly variable. Nitrification performance of ≥89 % was achieved with a minimum of 30 min aeration cycles. The highest denitrification efficiency was obtained in the cycle with 360 min aeration-off duration. Intermittent aeration provided higher TN removal, less sludge generation, and lower energy requirements for aeration. The impacts of aeration cycle duration on membrane filtration performance and foulant characterization were also investigated by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), gel-permeation chromatography (GPC), SEM coupled with energy dispersive spectroscopy (SEM-EDS), particle size distribution (PSD) analyses.
Orijinal dil | İngilizce |
---|---|
Makale numarası | 103886 |
Dergi | Journal of Water Process Engineering |
Hacim | 54 |
DOI'lar | |
Yayın durumu | Yayınlandı - Ağu 2023 |
Bibliyografik not
Publisher Copyright:© 2023 Elsevier Ltd
Finansman
This research was funded by Istanbul Medeniyet University Research Fund (Project no: F-GAP-2021-1715). Tülay YILMAZ received financial support from the Council of Higher Education (CoHE 100/2000 Ph.D. Scholarship Program) and TUBITAK (2211/A National Ph.D. Scholarship Program). This research was funded by Istanbul Medeniyet University Research Fund (Project no: F-GAP-2021-1715 ). Tülay YILMAZ received financial support from the Council of Higher Education ( CoHE 100/2000 Ph.D. Scholarship Program) and TUBITAK ( 2211/A National Ph.D. Scholarship Program).
Finansörler | Finansör numarası |
---|---|
Istanbul Medeniyet University Research Fund | F-GAP-2021-1715 |
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu | |
Yükseköğretim Kurulu |