One method that has worked ...

One method that has worked effectively here in Colorado is non-amended composting. The weather here is mostly dry. For a small facility, an operator only needs a Bob Cat to turn the sludge over every few days. The sludge volume greatly reduces. Some facilities then market the sludge to local businesses as a soil amendment and then sold to the public. The wastewater facility can then earn some revenue from this, thereby, cutting down there sludge disposal costs. Other facilities may store the sludge on site and have the general public come in once to several times per year and take the compost off site. This too greatly reduces the facility's sludge hauling costs.