Affordable for the Community
- are constructed using local labor.
- are constructed using locally available materials.
- use generic suppliers rather than specialized components.
- operate without electricity.
- minimize use of valves to reduce costs.
- minimize use of moving parts.
- are robust and resilient.
- are optimized for low-cost and high-performance.
- are easy to construct using low-precision construction techniques.
At the Inauguration of the San Nicolás Plant.
- use unit processes that are observable whenever possible (no sealed reactors).
- are possible to operate without doing math.
- use chemical dosages that are set directly.
- are maintainable by one person.
- have a direct-reading indicator of plant flow rate.
- have a chemical dosing control point close to flocculator.
- have no small parts that can be easily lost.
- have removable parts for inspection and maintenance.
- are enclosed in a building to provide protection from sun and rain.
- are sized so that all tanks are accessible by a human for inspection.
- include provisions so that the operator can receive appropriate feedback for every step of the treatment process.