Synthesis and evaluation of ultra-filter and nano-filter membranes for landfill leachate treatment by multi stage filtration procces
Paper ID : 1185-MST2015-FULL
Authors:
1mahsa alimoradi, 2Majid Peyravi, 1mohsen jahanshahi, 1etesam ganjian *
1Membrane Research Group, Nanobiotechnology Institute, Babol University of Technology, Babol, Iran
2Babol university of technology
Abstract:
Since treatment of landfill leachate is quite complicated, there is a need to develop a system that is capable of providing high treatment efficiencies. In this study, a laboratory-scale integrated landfill Leachate treatment process based on an internal membrane bioreactor (MBR) and Nanofiltration (NF) technology has been planed and established. In this regards, an aerobic bioreactor with a nano pores membrane which was manipulated in the form of plate and frame by phase inversion method with an area of 0.04 m2 was carried out. The synthesized PSf membrane was immersed into the bioreactor as an internal MBR. The biologically treated effluent procured from the Membrane Bioreactor is pumped out with a peristaltic suction pump and then, was further treated using a Nanofiltration process. Nanofiltration process was suggested as a post-treatment, in order that upgrade MBR effluent. NF membrane was prepared by interfacial polymerization of m- phenylenediamine (2 % w/v) and trimesoyl chloride (0.1% w/v) on the polysulfone support membrane. Maximum COD removal of about 75% was attained in MBR at food-to microorganism (F/M) ratio (BOD basis) of 0.2 gBOD/MLSS.d under optimum HRT of 24 h. The addition of NF process increased the efficiency up to 97%..The obtained results indicate increasing of COD removal. The addition of consecutive membrane operations to biological treatment resulted in high removal efficiency by removing bio-refractory compounds. Further, NH3 –N, TKN and Heavy metals removal efficiency, amounted to 97 ± 2%,96 ± 2% , 99 ± 2% ,respectively.
Keywords:
Landfill leachate, Membrane bioreactor, Nanofiltration Process
Status : Paper Accepted (Poster Presentation)