Big Dutchman's waste management systems awarded green certification Big Dutchman's waste management systems, CompoTower and CompoTower with Air Scrubber, were awarded the MyHIJAU certification by the Malaysian government. [...] To improve the system, Big Dutchman added the Air Scrubber solution, which reduces ammonia emission by turning it into nitrogenous fertilizer that can be used in farming. [...] "The lack of odor is an advantage, too". [...]