[Pilot study on combined MBR-RO process for wastewater recovery].
The combined MBR-RO pilot system, using A2/O-MBR technology as a pre-treatment process, has been set up for the direct municipal wastewater treatment and recovery. The objective of this pilot study was to further investigate the feasibility of MBR system as a pretreatment process for RO permeation, estimate the MBR-RO process to produce high grade effluent, and evaluate the different pre-conditions affecting the RO permeability and bio-fouling. The results showed that the average RO permeate qualities were as TOC < 1.3 mg/L, NH4+ -N < 0.03 mg/L, TN < 0.1 mg/L and not detectable for TP, in terms of conductivity < 30 microS/cm and turbidity < 0.12 NTU, and complete inorganic irons rejection could be achieved with the lowest concentration, thus the grade of RO effluent could meet the drinking water standard. MBR technology was suitable as a pre-treatment process for RO in the MBR-RO process and thus no severe RO bio-fouling occurred during the whole study period of 6 months.
Cao
Bin
B
State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science & Engineering, Tsinghua University, Beijing 100084,China. bcao@tsinghua.edu.cn
Huang
Xia
X
Atsushi
Kitanaka
K
Yang
Yu-fang
YF
D019149:Bioreactors; D003247:Conservation of Natural Resources / Q000379:methods*; D008567:Membranes, Artificial; D010865:Pilot Projects; D015203:Reproducibility of Results; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
D008567:Membranes, Artificial