Liq. farmyard manure treatment - using paddle-mixer and hot air produced from natural sources

摘要

Liq.-animal farm waste and liq. manure in a pit are treated with gas or air which has been heated before injection into the pit contents. The heat input required comes from natural sources; either the air is taken from the warm air extraction plant in the animal stables, or it is heated by solar heat collectors or heat pumps using the heat of the earth. This is a simple and low-cost method of speeding up the fermentation and of improving it.