Abstract: A cleaning device includes a base which has at least one dust collector received therein and two rollers are located in the underside of the base. Each roller includes multiple scrape plates extending radially outward therefrom so as to remove the dust from the floor into the at least one dust collector. At least two connection plates are connected to two opposite sides of the base and a wiping fabric, made of absorbent material, is attached between the at least two connection plates and located across an underside of the base. The wiping fabric can remove liquid type stuff on the floor. An assistance unit is connected to one side of the base and includes brushes or s wiping plate to clean the dust at the corner or beside the wall.

Abstract: A non-sterile, pasteurized nutrient substrate composition is disclosed suitable for growing shiitake mushrooms. Its composition and preparation are described. In addition, the use of the substrate composition is taught for the commercial, large-scale growth of shiitake mushrooms in trays or beds.

Abstract: An improved nutrient supplement is disclosed for enhancing the growth of mushroom mycelium in a compost bed comprising a particulate nutrient supplement having at least a partial coating of a hydrophobic material that is not readily assimilable by competing microorganisms in the compost.