OSMOTIC TREATMENT INDUSTRY
Application of SURO membrane system in a solid waste disposal site
Project introduction
The landfill leachate treatment plant adopts the international advanced combined process of "external MBR (two-stage biological denitrification) + two-stage nanofiltration/reverse osmosis". The treatment scale is 500m3 /d, and the treated effluent meets the national emission standard. The project adopted SURO NF30-8040 membrane elmemnt and replaced the original imported nanofiltration membrane products. Since its installation and operation in June 2018, the nanofiltration membrane system has maintained a good CODcr removal rate while operating at a lower energy consumption.
The process flow
The process flow of on-site waste osmotic treatment is shown in the figure below.
Apply product and membrane component parameters
| Model | Output/Set | Membrane Flux | Recovery Rate | System Rejection(%) | Operating Pressure |
| SURO NF30-8040 | 500m3/d | 18.0LMH | 85% | ＞92% | 0.6MPa |
Nanofiltration membrane water production standard discharge
After landfill leachate is treated, it meets table 3 of Domestic Garbage Landfill Pollution Control Standards (GB16889-2008) (Some pollutants)
| No. | Foulants | Permeate Concentration | No. | Foulants | Permeate Concentration |
| 1 | chrominance (dilution multiple) | 30 | 4 | SS(mg/L) | 30 |
| 2 | CODcr(mg/L) | 60 | 5 | TN(mg/L) | 20 |
| 1 | BOD5(mg/L) | 20 | 6 | NH3-N(mg/L) | 8 |