Reclamation and environmentally friendly treatment technology of livestock wastes;

In the process of composting with high temperature and aeration for three kinds of animal wastes, the effect of different aeration ways to turn over and agitate on composting are compared, including complete forced aeration, semi- circulating forced aeration and non forced aeration.

In order to safely use the compost that produced by animal wastes,the content of heavy metals,such as Cu,Zn,Pb,Cd,Cr,As and Hg were measured separately in five commercial composts that produced by bovine,fowl and porcine dejection.

Two pilot composting experiments were carried out to investigate some parameters about the variation of metabolic enzymes and the degradation of phytotoxicity materials in the aerobic composting of animal waste,such as the composting temperature,the pH value,the germination index,as well as the activities of urease,cellulase,phosphatase and β-glucosidase.