{"id":85134,"date":"2026-07-09T15:40:58","date_gmt":"2026-07-09T13:40:58","guid":{"rendered":"https:\/\/www.kwrwater.nl\/actueel\/vinger-aan-de-pols-bij-het-recirculeren-van-gietwater-in-de-kas\/"},"modified":"2026-07-09T15:46:12","modified_gmt":"2026-07-09T13:46:12","slug":"vinger-aan-de-pols-bij-het-recirculeren-van-gietwater-in-de-kas","status":"publish","type":"post","link":"https:\/\/www.kwrwater.nl\/en\/actueel\/vinger-aan-de-pols-bij-het-recirculeren-van-gietwater-in-de-kas\/","title":{"rendered":"Monitoring recirculated irrigation water in the greenhouse"},"content":{"rendered":"
\n

By next year, Dutch greenhouse horticulture must be emission-free, meaning that irrigation water will need to be fully recirculated. This raises questions about water quality and the potential spread of micro-organisms that could harm crops. In the OSIRES project, researchers explored a method that would enable growers to monitor microbiology and organic matter in recirculation water. \u201cThere is not yet a concrete toolbox,\u201d says KWR researcher Marcelle van der Waals. \u201cBut we do now have a clearer idea of the techniques that could form part of it.\u201d<\/p>\n<\/div>\n

With emission-free greenhouse horticulture on the horizon, Van der Waals is seeing an increasing focus on water quality in the sector. \u201cRecirculating irrigation water means that growers need knowledge about the water cycle inside the greenhouse,\u201d she explains. \u201cAt KWR, we have built up many years of expertise for drinking water companies on water quality and how to measure it. These insights can be applied very effectively in other sectors, such as greenhouse horticulture.\u201d<\/p>\n

The project \u2018Organische stof in recirculatiewater voor sturing microbi\u00eble diversiteit en functionaliteit (OSIRES)<\/a>\u2019 aimed to identify the extent to which organic matter and micro-organisms accumulate in water during recirculation, including the effects this may have on plants. The project also examined the functionality of biostimulants: special products marketed as supplements to artificial fertilisers and pesticides, characterised by claims that they can increase crop yields and contribute to more resilient cultivation.<\/p>\n

Read the full impact story on the website of TKI Watertechnologie<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

As greenhouse horticulture moves towards near-zero emissions, careful monitoring of recirculation water quality is becoming increasingly important. In the OSIRES project, KWR is investigating how growers can better monitor and manage organic matter and microbiology in recirculation water to support healthy, resilient cultivation.<\/p>\n","protected":false},"author":67,"featured_media":85131,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","footnotes":""},"categories":[7],"tags":[],"class_list":["post-85134","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-watersector-en"],"acf":[],"yoast_head":"\nMonitoring recirculated irrigation water in the greenhouse - KWR<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kwrwater.nl\/en\/actueel\/vinger-aan-de-pols-bij-het-recirculeren-van-gietwater-in-de-kas\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Monitoring recirculated irrigation water in the greenhouse - KWR\" \/>\n<meta property=\"og:description\" content=\"As greenhouse horticulture moves towards near-zero emissions, careful monitoring of recirculation water quality is becoming increasingly important. In the OSIRES project, KWR is investigating how growers can better monitor and manage organic matter and microbiology in recirculation water to support healthy, resilient cultivation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.kwrwater.nl\/en\/actueel\/vinger-aan-de-pols-bij-het-recirculeren-van-gietwater-in-de-kas\/\" \/>\n<meta property=\"og:site_name\" content=\"KWR\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/KWRwater\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-09T13:40:58+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-09T13:46:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.kwrwater.nl\/wp-content\/uploads\/2026\/07\/davehan2016-tomato-1310961_klein.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"1333\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Eveline van der Torre\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@KWR_water\" \/>\n<meta name=\"twitter:site\" content=\"@KWR_water\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Eveline van der Torre\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.kwrwater.nl\/en\/actueel\/vinger-aan-de-pols-bij-het-recirculeren-van-gietwater-in-de-kas\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.kwrwater.nl\/en\/actueel\/vinger-aan-de-pols-bij-het-recirculeren-van-gietwater-in-de-kas\/\"},\"author\":{\"name\":\"Eveline van der Torre\",\"@id\":\"https:\/\/www.kwrwater.nl\/en\/#\/schema\/person\/910d0991398e370f6b724a65cf882d57\"},\"headline\":\"Monitoring recirculated irrigation water in the greenhouse\",\"datePublished\":\"2026-07-09T13:40:58+00:00\",\"dateModified\":\"2026-07-09T13:46:12+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.kwrwater.nl\/en\/actueel\/vinger-aan-de-pols-bij-het-recirculeren-van-gietwater-in-de-kas\/\"},\"wordCount\":250,\"publisher\":{\"@id\":\"https:\/\/www.kwrwater.nl\/en\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.kwrwater.nl\/en\/actueel\/vinger-aan-de-pols-bij-het-recirculeren-van-gietwater-in-de-kas\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.kwrwater.nl\/wp-content\/uploads\/2026\/07\/davehan2016-tomato-1310961_klein.jpg\",\"articleSection\":[\"Water Sector\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.kwrwater.nl\/en\/actueel\/vinger-aan-de-pols-bij-het-recirculeren-van-gietwater-in-de-kas\/\",\"url\":\"https:\/\/www.kwrwater.nl\/en\/actueel\/vinger-aan-de-pols-bij-het-recirculeren-van-gietwater-in-de-kas\/\",\"name\":\"Monitoring recirculated irrigation water in the greenhouse - 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