Mobile water purification installation
The Waterson Membership takes all care away from the grower. During the change of growth, the 4.5 hectare of rock wool growth releases around 10 m3 of rest water, which is gathered in an empty silo. At a set date Waterson will show up with the mobile watering purification installation and connects it to the waste water silo. The water is purified and pumped into a mobile buffer with telemetry control. The buffer with the 'clean' water is then temporarily connected to the telemetry network of municipality Westland. Draining through telemetry, which is obligated in this area, optimizes the use of the drainage capacity of the sewer system.
The tomato grower uses rain water from a basin of 4,000 m3 for growing, and supplemented by osmosis water. The drain water is decontaminated with a Vialux high pressure UV installation. Van Koppen: "Because we grow in a closed system all year round, the investment of a purification installation with sewer buffer with telemetry control is not an option for us. It also took a long time before there was clarity about the approval of purification installations. By using potassium nitrate with low sodium content, we can limit the sodium accumulation in the drain water, also reducing our rest water. Investing in a purification installation which is inoperative 360 days a year, and also comes with an mandatory telemetry buffer, is an expensive solution. That is why we opted for mobile water purification."
Read more about the experiences of Robert van Koppen here
Source: Harry Stijger, LTO Ledenvoordeel