Changes in biochemical characteristics of stability in food waste compost by four different techniques

Biochemical changes related to stability of food waste compost are strongly affected by different composting techniques. For evaluation of compost maturity three locally fabricated composters and windrow process were examined at seven days interval up to 91 days by loading food waste along with bulking agent. Gradual changes in chemical characteristics related to stability and maturity of compost were studied and compared. Increase in ammonia nitrogen level due to rise in temperature was maximum in aerobic process than others. Substantial increase of CEC in aerobic process was earlier which leads to establish the optimal degree of maturity as compared to other processes. . Optimal level in stability and maturity parameters like C: N, was attained earlier in aerobic process as compared to windrow, facultative and anaerobic processes due to continuous aeration. The compost from the aerobic process provided good humus and micronutrients. Result from this study will assist in method optimization and quality of the compost product.