Technical and economic aspects of purification strategies to minimise discharge water from companies with closed soilless cultivation systems

The aim of the research project was to achieve closure by two complementary means: 1) maximising reuse of the nutrient solution by solving problems in recirculation that leads to discharge, and 2) purification of the left over discharged water. In this paper the technical and economic aspects of purification strategies for single companies will...

Valorisation of discharge water from substrate-grown crops in greenhouses

Due to mismatch of nutrients, high sodium concentration, growth inhibition or system failures, greenhouse growers with substrate-grown crops tend to discharge their drain water. To comply with Water Framework regulations, in future, they must re-use drain water streams as much as possible. With membrane distillation or reverse osmosis, about 80...