Kalundborg Symbiosis is based on innovative solutions that ensure resources are used more sustainably. However, the optimal production of the future is not always in sight, and solutions often need to be tested on a smaller scale before a new symbiosis flow can be established. Over the years, Symbiosis has hosted test and demonstration facilities, testing technologies for wastewater treatment using microalgae, for the production of second-generation bioethanol, for low-temperature pyrolysis - and much more. Sometimes, even full-scale production can be established from the test and demonstration plants built, see for example RE Energy, as well as plants used for purposes other than those for which they were originally built. Kalundborg Utility, for example, is now using the greenhouse originally built for microalgae plants for Denmark's largest sludge mineralisation test plant for sustainable sludge treatment in collaboration with FORS and WSP. Another good example of innovation can be found at Unibio, an innovative developer of protein production technology that converts methane from any source into a highly concentrated protein feedstock for use as an ingredient in animal feed. The technology developed by Unibio replicates the microbiological processes that occur in nature every day using the U-Loop® fermentor patented by Unibio. The fermentation technology has been demonstrated on a pilot and demonstration scale in Kalundborg, using biogas supplied by Kalundborg Bioenergy.