Cambridge Energy Waste Management Ltd. is a testing Laboratory which specializes in providing chemical and biological research services.We separate the plastic and metal and sell it and the only thing that is left is inert slag. Nothing left over but a small amount of slag that you can use in cement making or road filler.Where waste feedstock's, rich in energy, such as Infectious hospital waste, Municipal Solid Waste and many other industrial wastes are processed, the Gasification system will be a net producer of energy. The Bu Chang system requires electricity to operate Will give an net electrical gain from as small as 5 Mega Watts to as much as 260 Mega Watts depending on the size of unit and how much good waste we can get.