Synthetic hospital wastewater treatment by coupling submerged membrane bioreactor and electrochemical advanced oxidation process: Kinetic study and toxicity assessment

A study on novel coupled membrane bioreactor with electro oxidation for biofouling reduction

“…However, MBR and IEOMBR had equal chemical dosage for back-washing, and the pumping cost is the same for both. Similar reports from the literature [22,23] reveal integrated electro-oxidation with membrane bioreactor exhibited a better efficiency in pollutant degradation compared with MBR. The energy consumption calculated for the MBR process was found to be 1.3 kWh/m 3 , whereas the energy consumption calculated for the IMBR process was found to be 1.32 kWh/m 3 .…”

“…The improper growth activity in the MBR treated water is mainly due to the lack of pretreatment, whereas in IEOMBR treated water, the growth was highly appreciable and comparable with that of groundwater. Earlier reports [22] reveal a similar pattern in toxicity study where treated water obtained from the integrated combination (MBR-EO) were subjected for toxicity test with Daphnia Magna, which does not affect the growth of organisms. Both raw tannery wastewater and MBR effluent contain contaminants that affect seed germination, which is the first stage of plant development.…”

“…The COD removal was found to be gradual and maximum at 6 h, beyond which COD removal became constant. The optimized hydraulic retention time in this experiment is comparatively low, and the percentage of COD removal was high compared with our previous reports [22].…”

“…Whereas, Ibeid et al [21], demonstrated that the SMEBR system had a lesser membrane biofouling rate by increasing the removal rate of organic materials and soluble microbial products (SMP). In addition, when electrochemical oxidation used as a post-treatment showed a better removal efficiency than pretreatment configuration [22]. The coupled membrane bioreactor with electrochemical oxidation (PbO2 as anode) as a post-treatment [23], showed a 99.9% removal of toxic pollutants (CBZ), in which electro-oxidation process plays a vital role towards the removal of toxic pollutant.…”

Recent Trends in Removal Pharmaceuticals and Personal Care Products by Electrochemical Oxidation and Combined Systems

“…In an exciting study for investigating pre-and post-treatment in one system to remove synthetic hospital wastewater fortified with four drug pollutants including carbamazepine, ibuprofen, estradiol, and venlafaxine by the combination of MBR and EOP, MBR alone treatment of wastewater showed a high percentage of ibuprofen and estradiol removal (about 90%), while carbamazepine and venlafaxine performed a low elimination (at around 10%). EOP as post-treatment, this allowed high removal (about 97%) of the four pharmaceutical pollutants and far more successful compared to EOP as pre-treatment [119]. The integration of electrochemical processes into MBR systems can utilize the mechanism of biodegradation, sorption, hydrolysis, and filtration on conventional MBR and electrocoagulation, electroosmosis, and electrophoresis on electrochemical processes that improve both the performance and the control of membrane fouling for eliminating recalcitrant micropollutants [120,121].…”