Leachate Water Treatment
About Landfill Leachate
During landfill site operation, a liquid known as leachate is produce. It is a mixture of organic degradation products, liquid waste and rain water. It has a high organic carbon content, high concentrations of nitrogen and usually slightly acidic.
Effect Of Leachate
The unscientific discharge of landfill leachate can lead to serious environmental problems, since the leachate contains a large amount of organic matter(both biodegradable and non-biodegradable carbon), ammonia-nitrogen, heavy metals, chlorinated organic and inorganic salts.
The leachate should be treated before it is discharged due to the risk posed by its high organic contaminant concentrations, high concentration of ammonia as well as pathogenic microorganisms that might be present in it.
Need Of Leachate Treatment
As per Municipal Solid Wastes (Management & Handling) Rules, 2000 of The Environment (Protection) Act, 1986:
It is mandatory to Treat Leachate Before Disposal due to its adverse effect on Environment and human being.
Solution - Ro Technology
The purification of landfill leachate with membrane technology helps to avoid further contamination of resources such as groundwater and surface water.
Beside the ecological aspect of minimizing the burden on the environment, the economical feasibility also has to be taken into consideration. In this regard membrane filtration has proven to be a justifiable and economical solution in most cases as compared to the overall costs incurred by other processes of landfill leachate treatment.
Advantages
-
Maximize recovery of treated water
- On site, online solution helps in fast treatment & eliminates transportation of leachate to sewage treatment plant / other natural resources.
- It requires minimum pretreatment & No Sludge Generation from Pretreatment Processes.
- It limits the spread of contaminants like COD, BOD, TDS, TSS etc. to the environment
- Lesser space & time required for plant set up.
- High recovery of treated water upto 85%, ZLD
- Capacity can range from 1 Cu meter to any capacity as per requirement
Process Flow Diagram
Reverse Osmosis Plant Performance
| Parameters | Unit | Input To RO (RO Feed) |
RO Output (RO Permeate) |
| Chemical Oxygen Demand | PPM | 30800 | 160 |
| Biochemical Oxygen Demand | PPM | 12434 | 28 |
| Total Dissolved Solids | PPM | 19829 | 343 |
| Iron As Fe | PPM | 75 | < 0.05 |
| Lead As Pb | PPM | 0.053 | < 0.05 |
| Chromium As Cr | PPM | 0.27 | < 0.04 |
| Nitrate As No3 | PPM | < 2 | < 2 |
| Phosphorous As P | PPM | < 2 | < 2 |
Leachate Treatment - Case Study
| Sr. No. | Description | UoM | Value |
| 1 | Place | -- | Tier 1 City in Maharashtra |
| 2 | Leachate Treated | m3 | 33300 |
| 3 | Clean water generated | m3 | 28600 |
| 4 | Total years of project | --- | 4 YEARS |
| 5 | Scope of Work | 100m3/Day | Execution & Operation |
Advantages
- Portable, Containerized Solution
- Online Solution
- Lesser space & time required
- High treated water recovery
