Abstract: A filtering device for reducing radiation, sediment, contamination, pollution, and erosion control contains a first flow plate, a second flow plate, a tubular portion, and a biodegradable filtering material. The first flow plate is terminally connected to a first end of the tubular portion. A plurality of openings of the first flow plate allows water to enter the tubular portion. The second flow plate is terminally connected to a second end of the tubular portion. A plurality of openings of the second flow plate allows water to exit the tubular portion. The biodegradable filtering material is integrated within the tubular portion so that water entering the tubular portion at the first end is filtered prior to exiting the tubular portion at the second end. Switchgrass is utilized as the biodegradable filtering material.

Abstract: A biodegradable runoff filter is an apparatus that is used to filter silt, chemicals, and other contaminants out of water runoff produced at or near a work site. The apparatus includes a biodegradable filter sock, a botanical biomass filling, and a fastener. The biodegradable filter sock is a water-permeable container that is used to contain an amount of the botanical biomass filling. The biodegradable filter sock includes a lateral portion, an open end and a closed end. The lateral portion and the closed end surround the botanical biomass filling and contain it to a specific area. The open end of the biodegradable filter sock allows the botanical biomass filling to be packed into the biodegradable filter sock. The fastener fits over the open end and cinches the open end shut to prevent the botanical biomass filling from falling out of the biodegradable filter sock.