Thesis - faculty.ait.ac.th - Asian Institute of Technology

Influent
Figure 2.8 Schematic Diagram of Microfiltration/Reverse Osmosis for Leachate Treatment
(Qasim and Chiang, 1994)
2.9.3 Denitrification-Nitrification/Ultrafiltration and Reverse Osmosis
The application of membrane bioreactors combined with reverse osmosis on a full
scale leachate treatment was evaluated by PCI Memtech. The process train is as shown in
Figure 2.9.
Initially a RO unit was used in the leachate treatment; however, combination of
composted wastewater and leachate led to a decrease in the RO performance. Therefore, an
aerobic MBR was adopted. The treatment scheme consists of separate nitrificationdenitrification
reactors followed by an external UF membrane. The performance of the
plant is illustrated in Table 2.16.
Leachate
Flow
Equalization
Chemical
Treatment
Microfiltration Reverse Osmosis
Figure 2.9 Schematic Diagram of Denitrification-Nitrification/UF and Reverse Osmosis for
Leachate Treatment
38
Solids
Filter Press
Denitrification Ultrafiltration
Reverse Osmosis I
Permeate II
Discharge to
Surface Water
Concentrate II
Concentrate I
(To Landfill Site)
Reverse Osmosis II
Effluent
RO Concentrate
(Recirculation)
Permeate I