Evaluate the membrane bioreactor and nanofiltration performance in treatment and reuse of domestic wastewater

The purpose of this research is to estimate the performance of membrane bioreactor (MBR) technology along with nanofiltration membrane (NF) for treating domestic wastewater and reuse. The membrane bioreactor (MBR) system was used as a pretreatment of the nanofiltration (NF) membrane. The first part...

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Bibliographic Details
Main Authors: Al-Abedi, E. B. Z., Gzar, H. A., Zakoor, Y. A., Al-Hachami, H. M. H.
Format: Conference Proceeding
Language:English
Subjects:
Biochemical oxygen demand
Bioreactors
Chemical oxygen demand
Contaminants
Hydraulic retention time
Membranes
Nanofiltration
Pretreatment
Rejection rate
Solid suspensions
Turbidity
Wastewater treatment
Water reclamation
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Summary:The purpose of this research is to estimate the performance of membrane bioreactor (MBR) technology along with nanofiltration membrane (NF) for treating domestic wastewater and reuse. The membrane bioreactor (MBR) system was used as a pretreatment of the nanofiltration (NF) membrane. The first part was to study the influence of hydraulic retention time (HRT) as well as mixed liquid suspended solids concentrations (MLSS) on the removal percentages of chemical oxygen demand (COD), turbidity and biochemical oxygen demand (BOD). The results showed that with an increase in the HRT period and MLSS concentrations, MBR technology has improved its efficacy in domestic wastewater treatment. So when HRT =1day, the greatest removal efficiency for COD, BOD, and turbidity equaled to 85.7 %, 84.6, and 97 %, respectively, and when HRT = 2 days, the maximal achieved removal efficiency equals 90.8 %, 91.9%, and 97.9 %. The other part was examining the effects of the operational ranges of pressure and NF feeding temperature on the COD rejection rate. To remove the remaining organic contaminants, NF membrane is used to treat the MBR effluent. The results reveal that with higher pressure and lower rates of temperature, the removal percentage increases. At a pressure of 10 bar and at a temperature of 25 °C, the high removal efficiencies for COD were 99.4 %, which is very good. As a result, the use of MBR as a pretreatment for NF is considered as a promising treatment method for a variety of wastewater effluent reclamation and reuse applications.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0163382