Recent years have seen a marked increase in the use of coir for cannabis cultivation and the propagation of young plants. The sensitivity of such crops has meant that buffered coir has become a substrate of choice. In the production of buffered coir substrate, calcium nitrate is used to remove unwanted elements such as sodium, potassium, silicon, chloride and boron. These elements have a major influence on the germination, propagation and growth of plants, so it is advised to eliminate them. Not many growers are aware of the fact that the waste water of the calcium nitrate treatment, if not managed properly, can become a very serious threat to the local environment of the substrate manufacturer. This is why, back in 2015, the producers of Medicoir installed an advanced waste water treatment plant at their production site in the North Western Province of Sri Lanka, and at the time was the first to do so.

As the demand for buffered coir substrate increased, the producers of Medicoir was left with more and more waste water to dispose of. In the past it was sufficient to dilute the waste water and supply it as a nutrient solution to fertigate the surrounding 120 acres of coconut, banana and pineapple plantations. But as production increased, the amount of waste water rose significantly and some kind of waste water treatment system was necessary. It is very important to the producers of Medicoir that they are mindful of using and disposing of water in an environmentally responsible manner.

The company contracted engineers from the Sri Lankan company Puritas to design and install a state-of-the-art turnkey water treatment plant and is now able to collect all waste water in a closed, central system and remove the particles that are harmful to the environment. The waste water is then processed multiple times with several advanced filtration technologies and purification treatments. After treatment, the water is as clear as drinking water and meets all standards of the Sri Lankan Environmental Authority, who frequently take samples and monitor soil and water wells in and around the coir production sites to test them for pollution.