Local Waste Water Treatment Method Appropriate for Industrial Waste Water

Nobel prize for Water Youth Edition: Video. Water treatment method for waste water from dying textiles.

Their project was submitted as "Domestic filter as an alternative in the reuse of inked water in the cultivation of vegetables.” Source.

The Stockholm Water Foundation has a write up which includes a link to a PDF which may contain enough information to try to replicate this waste water treatment system explicitly designed for residents of Oaxaca, Mexico to fit these parameters:

1. It's an arid area which needs to reduce importation of water because that's too expensive. 

2. It needs to be a filtration system using natural materials locally available, such as gravel and sand.

3. It needs to be useful to locals with limited education. 

4. It needs to successfully remediate water following local industrial uses leaving it full of dyes and chemicals that kill plants if used without treating it.

It adequately meets the constraints I try to shoot for while providing a solution in the face of industrial and economic development in very underdeveloped places where very basic water infrastructure has been introduced and this is fostering local industrial development.