EFFECT OF VARIOUS MICROORGANISMS ON NITROGEN CONSERVATION IN ORGANIC WASTES COMPOSTING

摘要

Thermophilic compost is an effective strategy to recycling use of ever-increasing organic wastes, however, a large proportion of nitrogen species (N) can be lost via ammonia (NH3) volatilization during composting. The study aimed to examine the effects of the acetic acid bacteria (AAB), compound microbes (CM) and the synergetic effect of the two microbes (CM+AAB) on the total nitrogen loss (TN) during composting of organic wastes. Results showed that the CM, AAB, and CM+AAB synergetic treatments reduced the loss of nitrogen by approximately 39.29%, 11.57%, 13.24%, respectively. The germination indexes of CM were maximum in the three treatment groups. Effects of different C/N ratios on the nitrogen conservation during composting were evaluated. Generally, the most effective strategy for reduction of nitrogen losses in composting of organic wastes was to add CM into the compost materials and to adjust the C/N ratio to 20.