Title: Mixed organic waste composting using rotary drum composter
Author: Ajay S. Kalamdhad, A.A. Kazmi
Department of Civil Engineering, Indian Institute of Technology (IITR), Roorkee – 247667, India.
Department of Civil Engineering, Indian Institute of Technology (IITR), Roorkee – 247667, India
Abstract: A combination of vegetable waste, cattle manure and saw dust was utilised for high rate composting in a household rotary drum composter. It was found that temperature remained above 55°C for a period of two days, Faecal Coliforms and Faecal Streptococci decrease from 7.5 × 108 to 5 × 102 and 1.5 × 107 to 5 × 103 bacteria/g, respectively. Negligible VFAs production indicated full aerobic conditions. Nitrification occurred after sixth day i.e., when temperature dropped below 40°C. BOD/COD ratio decreased up to 12 days and remained stable thereafter, indicating the stability of compost in terms of biodegradation.
Keywords: decentralised composting; rotary drum composters; solid waste management; mixed organic matter; cattle manure; C:N ratio; temperature; aerobic condition; organic waste; vegetable waste; cattle manure; sawdust; nitrification; biodegradation.
Int. J. of Environment and Waste Management, 2008 Vol.2, No.1/2, pp.24 - 36
Available online: 03 Feb 2008