Revaluation of Maturity and Stability Indices for Compost

Bod/cod ratio of compost was studied in conjunction with c/n ratio as commonly maturity index. carbonaceous materials as well as nitrogenous materials declined in open-air conditions during 20 weeks. c/n ratio was correlated with bod/cod, a couple parameters to qualify the compost was mature and stable. this study came up to the conclusion that compost maturity with c/n of less than 14 instead of less than 20 was corresponding to stability with bod/cod of less than 0.1. additional assurance on maturity and stability was carbon dioxide emission rate of less than 2 mg c/g vs/day.