The temperature rises because of biological activities in the waste piles and microbial action shift to misophilic to thermophilic stage. After this pile is turned up for cooling and aeration to avoid anaerobic decomposition. The temperature of pile again rises to 75 0 C and process of turning cooling and aeration are repeated. The complete process may taker 4 to 6 weeks and finally compost is ready to use. As fertilizers