Abstract
Osmotic membrane bioreactor (OMBR) was operated to treat high strength wastewater. Cellulose triacetate (CTA) membrane, having effective membrane area of 0.12m2, in a flat-sheet module configuration was submerged in a bio-tank (working volume 4.5L). SRT of 20days and periodic removal of supernatant from settled sludge were maintained to control the salinity level in the bio-tank. Keeping operating conditions constant, the OMBR system was operated in treating 2, 5 and 10mg/L of Chromium (Cr) and Lead (Pb) metals, respectively of the high strength wastewater. Effect of these metals on membrane fouling, sludge characteristics and treatment performances in term of organic carbon, ammonium-nitrogen and phosphate-phosphorous were investigated. Biomass properties including specific oxygen uptake rate (SOUR), MLSS concentration and capillary suction time (CST) were determined. There was no significant effect of lower concentrations of Cr on sludge properties while 63% of biomass reduction and 42% of biomass activity (SOUR) inhibition were reported for 10mg/L of Cr. In case of Pb, even its lower concentrations of 2 and 5mg/L were producing toxic effects on sludge properties i.e., 14.7 and 40% of biomass (MLSS) and 72 and 83% of bioactivity (SOUR) inhibitions were observed for the Pb concentrations, respectively.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
