Water purification
Based on the ‘Main Lines Agreement Water Purification in Dutch Greenhouse Horticulture’, the water purification obligation (≥95%) applies to drainage water for substrate cultivation, drainage water for soil-based cultivation and filter rinse water (if rinsed with drainage water or fertilized irrigation water). If (chemical) crop protection agents are used, these must be removed from the water to be discharged by at least 95%.
For national and international customers, we make water purification systems that certainly meet the above requirements. We also make advanced water purification systems for the industry.
UV water disinfectant
Ultraviolet (UV) light is a very effective method for water disinfection in horticulture, where it is often used to disinfect drain water from substrate cultures before it is reused.
Water in horticulture must be disinfected from plant pathogens, including bacteria, fungal spores, viruses and/or nematodes. Some plant viruses are very difficult to kill and some fungi produce ‘survival structures’ that are designed to withstand all kinds of difficult conditions. Drain water can contain high concentrations of plant pathogens and must therefore be thoroughly disinfected, much more rigorously than water for human consumption or rainwater.
Buitelaar Engineering has developed the Buit-UV to disinfect this (drain) water by a specific UV dose, depending on the type of micro-organisms present in the water.
The general recommendations for the control of pathogenic microorganisms in drain water are:
100 mJ/cm2 UV dose for water containing bacteria and nematodes
150 mJ/cm2 UV dose for drain water containing fungi
250 mJ/cm2 UV dose for drain water containing viruses.
Legionella filters
The Buitelaar legionella filter ensures that no legionella bacteria are present in the filtered water.
The method of filtering is called ultrafiltration. Ultrafiltration is a physical and mechanical separation method that filters harmful substances and bacteria from liquids. By using ultrafiltration in various water systems and water filters, contamination of the legionella bacteria is prevented. The biggest advantage of this method is that it is ideally suited to retain only water molecules and dissolved particles after purification. Perfect when it comes to making water better and cleaner.
With ultrafiltration, various floating particles are filtered from a liquid using a membrane. In the case of purifying wastewater, drinking water or process water, the water is freed from harmful substances using a membrane. The membrane has a pore size of 0.02 microns. When a liquid passes this membrane, the membrane captures all substances, particles or bacteria that are larger than 0.02 microns. The fluid that flows through the membrane is therefore a clean fluid without bacteria or viruses.
According to Dutch Drinking Water legislation, only KIWA-certified products may be used as a separation method for Legionella prevention. When products meet these strict requirements, they receive a KIWA BRL K14010-1 certification.
The Legionella filters each have this certification and therefore comply with the laws and regulations of KIWA Netherlands.
