| ROWANWOOD IP INC. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120085702 | SEWAGE NITRATE REMOVAL BY FREE-DRAINING ASPHYXIANT FILTRATION AND CARBON ADDITION - In a sewage disposal system, a de-nitrification station is configured as a heap of foam cubes located in an airtight enclosure from which oxygen is excluded. Carbon is added to the incoming nitrified water. The heap of foam cubes is arranged as a free-draining trickle filter, but here under asphyxiant conditions in the enclosure. Anaerobic microbiological reactions reduce the nitrate to nitrogen gas. Effluent from the de-nitrifier is polished by feeding back a fraction of the effluent through the aeration station from which the nitrate water is derived, or a separate polishing station can be provided. | 04-12-2012 |
| 20110284438 | BIOLOGICAL FILTRATION SYSTEM WITH SOCKS OF ABSORBENT MATERIAL - In an apparatus for treating wastewater, e.g sewage water, the water passes through absorbent material. The material comprises e.g inexpensive scraps or off-cuts of plastic foam. The pieces of material are contained by being stuffed into lengths of plastic mesh tubing, which are then formed into closed-ended socks. The socks are stacked in layers, and the water to be treated is trickled down through the layers. The socks can also advantageously be used for anaerobic and submerged treatment of wastewater. | 11-24-2011 |
| 20080276977 | MOBILITY ASSISTANCE DEVICE - A walker frame is provided which has a generally open space frame and has handle portions that are cantilevered. | 11-13-2008 |
