Characterization of Canteen Waste Water Using External Membrane Bioreactor
- May 2, 2018
- Posted by: RSIS
- Category: Civil Engineering
International Journal of Research and Scientific Innovation (IJRSI) | Volume V, Issue IV, April 2018 | ISSN 2321–2705
Characterization of Canteen Waste Water Using External Membrane Bioreactor
Varsha Ashokan#, Keerthana L Madhu*
#Assistant Professor, Dept. Of Civil Engineering, *Student M TECH (Environmental Engineering), M DIT Ulliyeri, India
Abstract- Many regions face shortage of water for drinking and irrigational purposes. Areas with ample water supplies face issues like nutrient eutrophication and salinity intrusion etc. To meet the increasing water demand, hollow fibre external membrane bioreactor (EMBR) with sludge retention times (SRT) 2 and 4 hours were set up for treating canteen waste water of MDIT Ulliyeri at hydraulic retention times (HRT) 6, 7 and 24 hours. The performance of MBR is investigated under different aeration rates (2.5L/min and 1.5L/min). The influence of HRT and SRT on effluent quality is also determined. Increasing HRT and SRT results in noticeable increase in the removal efficiencies of turbidity, total suspended solids, BOD and COD. A comparative analysis was carried out on the effluent quality of MBR and Sequential Batch reactor (SBR).
I. INTRODUCTION
Membrane bioreactor as the name suggests is a combination of biological waste water treatment and filtration unit. MBR is an adaptation over activated sludge process where the sedimentation, flocculation and adsorption processes are replaced by filtration process alone. The fact behind MBR is that it works without the addition of chemicals. MBRs offer the advantage of total solids retention at all biomass concentrations, better effluent treatment quality and low sludge yield.
Organic matter removal efficiency in MBR is associated with the SRT. Increasing SRT directly results decrease in the concentration of soluble microbial products (SMP) thus improving effluent quality. High SRT produce starvation conditions in the bioreactor and thus reduces the formation extracellular polymeric substance (EPS) and low sludge production. Similarly operating at low SRTs increases membrane fouling and thus results in reduction in the MBR performance as a result of low biomass concentration.
