Plastic-lined tank
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A low cost alternative to metal or ferro-cement tanks for storing of water are plastic-lined tanks. Several models have been developed, for example:
- A cylinder of sheet metal containing a large (eg. 1 500 liter) reinforced plastic bag
- a plastic liner reinforced with a 10 000 liter plastic bag, installed in a hole in the ground.
Open storage tanks can be made of earth. If clay is not available, a plastic lining is needed to stop water from leaking away. Linings can be made of standard plastic sheet glued together with the tar normally used to repair roofs. The plastic must be covered with earth to prevent it from being exposed to the sun.
File:Plastic-lined tank.PNG
In Nicaragua earth is used to construct open storage tanks
| Advantages | Disadvantages/limitations |
|---|---|
| - Low cost alternative to metal or ferro-cement tanks. |
Capacity
Depending on the size of the design; 1 500 to 10 000 liter.
Costs
Material for a tank of 5 m3: 12 m2 of plastic sheet, 3 m of PVC tube and labour.
Examples and initiatives
The organisation IDE in Asia is developing several models of plastic-lined tanks.
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