The beneficial use of land applied biosolids is not limited to farmland. Research has shown that biosolids accelerate tree growth when applied to forest land and tree nurseries. Application to strip mines can help reclaim and vegetate the land. The biosolids are heated in a dryer to evaporate water content. Thermal drying is becoming more popular in North America.
Many cities produce and sell thermal dried biosolids as an organic additive to fertilizer.
In Canada, thermal dried biosolids are produced by the Outaouais Region, Smiths Falls, Montreal and Quebec City. A pelletizer in the City of Windsor will begin operations in early 1999. The City of Toronto is actively seeking to have its biosolids used in these manners. Landfill Disposal of biosolids in landfills is a common practice in North America and overseas. Use as Landfill Cover Biosolids can be used as daily cover for municipal waste.