Comprehensive Technology for the Environmental Control of Intensive Chicken Farm (Village) and the Utilization of Chicken Dung

Intensive chicken farms have developed rapidly in China in the recent years, resulting in environmental pollution caused by chicken dung which is at the same time rich in nutrient,mineral material, and trace elements. Properly processed, chicken dung may become a kind of feed or organic fertilizer. There are many different processing methods of dung but each has its merits and demerits. The comprehensive technology referred to in this paper has collected the merits of many other processing methods and avoided their demerits. It starts with the environmental control of chicken farm, fully utilizes resources of chicken dung, and recycls waste material. The new technology " Heatbed-type installation of purification of waste gas and recovery of waste heat" is adopted in the preprocessing of the dung to make the waste gas multiplely purified to reach the requirement of non-polluted exhaust, and to use the greater part of the waste heat to dry up the wet dung. It not only saves energy but also saves processing cost of chicken dung. Using this technology, the environment of chicken farm is controlled with good economic and social profits.