Limestone contactors in containers
This procedure has the advantage that the quality of the outlet water is always constant. In addition, operational and maintenance costs improve considerably over the traditional designs. Each unit is individually made according to project specific needs.
The limestone contactors are usually placed in parallel. Because they have the same height they offer the same counter-pressure. This facilitates the hydraulic design of the inlet manifold and provides an uniform and constant water distribution to the different tanks.
The contactors work directly with the water pressure from the reverse osmosis output.
The turbidity of the limestone contactors is controlled using dust free material and maintaining a constant flow rate, i.e. avoiding sudden changes in flowrate. During water shocks flow is initially diverted and incorporated gradually thereafter to the contactor.
There is very little need to purge the limestone contactors, as they operate upflow and do not tend to clog. However, at least once a year a 5 minutes sponging is recommended to reduce the risk the formation of preferential pathways.
This design concept looks to reduce the height to minimize visual impact and to take advantage of the steel structure of containers to hold inside limestone contactors.
The recharge is done from the top part, by removing the canvas from the container.
The installation is quick and easy.
Internal parts and the DrinTec™ process are protected by various patents.
Advantages of DrinTec™ limestone contactors process:
- Equipment shipped in standard ocean container
- Very high efficiency
- Low or no automation
- Constant performance and water quality
- Low maintenance cost
- Minimum or no energy consumption
- No moving parts
- More than 30 days autonomy
- No need for qualified workforce to operate
- No need for frequent backwash
Brochures
Technical Specs:
| 20′ container | 40′ container | Units | |
|---|---|---|---|
| Maximum treatable flow | Up to 1100** | Up to 2800** | m³/d |
| Turbidity | < 1 | NTU* | |
| Container weight (empty tank) | ≈3000 | ≈7500 | kg |
| Container weight (full tank) | ≈35000 | ≈75000 | kg |
| Maximum operating pressure | 1 | bar | |
| Outlet pressure | Atmospheric | ||
| System autonomy | 30 | days | |
| “Worm Tank” dimensions | 4790 x 1625 x 2000 | 4790 x 1625 x 2000 or 4790 x 1625 x 2250 |
(l x w x h) mm Height depending on flow requirements |
| Container type | 20’ Standard | 40’ High Cube | |
| Container internal dimensions | 5900 x 2350 x 2393 | 12036 x 2350 x 2693 | (l x w x h) mm |
| Design temperature | 40 | ºC | |
| Required material for operation | Granulated calcite & CO2 | ||
| Energy consumption | Nil | KWh/m³ | |
| Installation | “Plug and play” | ||
| Time between backwashing | At start up and then once a year | ||
| Backwash water | 220 | 220 | m3/h at 1 bar |
| Backwash air | 500 | 500 | Nm3/h at 0,7 bar |
* Assuming good quality calcite as per our recommendations in our technical brochure.
** Depends on permeate characteristics and water temperature.
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