Loading patent…
AssigneeCSF Treatment Systems, Inc.
InventorsJames H. Lenhart, John H. Knutson, William C. Stewart, David C. Campbell
Estimating the term…
A pelletized composition and method of using this composition for removing pollutants from storm water runoff. A bed of the pellets has a useful initial permeability to storm water runoff, and retains a significant proportion of this permeability for a period of several years. Preferably, the pellets are dried to a moisture content of less than 25 wt. % so that they are able to withstand a crush force of at least 7 lb., without structural failure. Optionally, the pellets may contain gravel that forms a core of the compost pellet and that assists in causing the compost to agglomerate into a rounded pellet. When immersed in water, the pellets retain the original dry shape and maintain a significant proportion of the crush strength while providing interstitial spaces through which storm water can flow thereby reducing the problem of sedimentation that is encountered in unpelletized beds of compost used in this service.
A method of treating storm water runoff to reduce the amount of pollutants in the storm water, the method comprising passing the storm water runoff through a bed of pellets, the bed of pellets sufficiently thick to significantly reduce a concentration of at least one contaminant present in the storm water, the pellets comprising mature deciduous leaf compost and gravel, the pellets able to withstand a crush force of at least about 7 lbs., before immersion in the storm water.
A composition for treating storm water runoff, the composition comprising, in pellet form, mature deciduous leaf compost, the pellet comprising less than about 25 wt. % water, based on a dry weight of the compost.
A method of pelletizing compost for use in the treatment of storm water runoff, the method comprising:
Dependencies are inferred from the claim text.