One of the biggest problems\nfaced by water treatment plants is bacterial growth, or biofouling, on reverse\nosmosis membranes, causing them to clog up. Traditionally, this is combated by\nadding environmentally harmful biocides to the water to be treated. NWTR opted\nfor a different solution, applying its very own invention: a BODAC filter\n(Biological Oxygen-Dosed Active Carbon). <\/p>\n\n\n\n
After ultrafiltration, the\nWWTP effluent passes through a BODAC filter. Adding oxygen optimises the\nconditions for bacterial growth, to the point that they will use up all the\nnutrients present in the water. Now the water has been depleted of all\nnutrients, bacteria will no longer be able to grow, thus preventing the\naccumulation of biofouling in the rest of the process. The clean water\ncontinues its way to the RO membranes. The filters are rinsed periodically to\nremove any excess bacteria, which are then returned to the WWTP. This process\nrequires no chemicals at all, apart from oxygen. <\/p>\n\n\n\n
The integration of an active carbon filter in a pure water plant was an experiment, but it has proven to work very well in practice. In fact, we have even learned that BODAC filters also remove pharmaceuticals from water. Since 2018, NWTR, the Vechtstromen water board and WLN have worked with Wetsus and STOWA to study the (biological) processes in BODAC filters and map them in greater detail. <\/p>\n","protected":false},"excerpt":{"rendered":"
NWTR prevents bacterial growth on the osmosis membranes with a biologically active carbon filter. Environmentally harmful biocides are not necessary.<\/p>\n","protected":false},"author":1,"featured_media":2315,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[31],"tags":[],"class_list":["post-1441","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-innovaties"],"_links":{"self":[{"href":"https:\/\/nwtr.nl\/en\/wp-json\/wp\/v2\/posts\/1441","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nwtr.nl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nwtr.nl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nwtr.nl\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nwtr.nl\/en\/wp-json\/wp\/v2\/comments?post=1441"}],"version-history":[{"count":2,"href":"https:\/\/nwtr.nl\/en\/wp-json\/wp\/v2\/posts\/1441\/revisions"}],"predecessor-version":[{"id":2985,"href":"https:\/\/nwtr.nl\/en\/wp-json\/wp\/v2\/posts\/1441\/revisions\/2985"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nwtr.nl\/en\/wp-json\/wp\/v2\/media\/2315"}],"wp:attachment":[{"href":"https:\/\/nwtr.nl\/en\/wp-json\/wp\/v2\/media?parent=1441"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nwtr.nl\/en\/wp-json\/wp\/v2\/categories?post=1441"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nwtr.nl\/en\/wp-json\/wp\/v2\/tags?post=1441"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}