Convert yards of dirt to cubic feet by multiplying the number of yards by 27 (one yard equals 27 cubic feet).onvert cubic feet to pounds by multiplying by the bulk density of topsoil, and then converting from cubic feet to tons. This is 83 pounds per cubic foot by 108 cubic feet, for a mass of 8,964 pounds.
Thermal hydrolysis is a two-stage process combining high-pressure boiling of waste or sludge followed by a rapid decompression.This combined action sterilizes the sludge and makes it more biodegradable, which improves digestion performance.he city of Oslo, Norway installed a system for converting domestic food waste to fuel in 2012. A thermal hydrolysis system produces biogas from the food waste, which provides fuel for the city bus system and is also used for agricultural fertilizer.
These pre-treatment methods alter the physical and chemical properties of sludge. in order to make it more readily degradable by anaerobic digestion. The thermal hydrolysis. process has been used in several treatment plants around the world, but none currently operate in. the US. Thermal hydrolysis causes cell walls to rupture under the effect of high temperature and. high pressure and results in highly solubilized product which is readily biodegradable. The. performance of the process was evaluated for a treatment plant located in Dallas, TX.