Evaluation of impact of HRT in MBR for sewage treatment
Keywords:
Membrane BioReactor(MBR), Hydraulic Retention Time(HRT), Mixed Liquor Suspended Solids(MLSS), Chemical Oxygen Demand(COD)Abstract
Water shortages and strict environmental provisions necessitates wastewater renovation using various
wastewater treatment methods, among which application of Membrane BioReactors (MBR) are rapidly
increasing due to their advantages such as high lading capacity and effluent quality. In this work, the effect of
Hydraulic Retention Time(HRT) on the effluent quality is investigated in a 5 liter submerged MBR equipped with
immersed PVDF hollow fibre membrane module. Acclimatization of bacteria for a period of one month was used
for domestic wastewater. Results show that 90% and 87.52% COD removals were achieved initially for 12 hr and
8 hr HRT respectively. By lowering the HRT at 6 hr, COD removal efficiency achieved was 75% for MLSS
concentration of 6000 mg/L. as per the literature review MBR can work sufficiently at shortest HRT of one hr.
