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Environmental Engineering Research 2012;17(2): 69-75. DOI: https://doi.org/10.4491/eer.2012.17.2.069
Composting of Water Hyacinth using a Pilot Scale Rotary Drum Composter
Waikhom Roshan Singh, Ayan Das, and Ajay Kalamdhad
Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati-781039, India
Corresponding Author: Ajay Kalamdhad ,Tel: +91-361-258-2431, Fax: +91-361-258-2440, Email: kalamdhad@gmail.com
Received: November 30, 2011;  Accepted: May 17, 2012.
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ABSTRACT
Composting of water hyacinth, mixed with cattle manure, rice husk and sawdust in four different proportions, was performed in a pilot scale rotary drum composter. The physico-chemical characteristics, i.e., temperature, moisture content, pH, electrical conductivity, total organic matter (OM), nitrogen dynamics and nutrients were evaluated during the 20 days composting process. The stabilities of the composts were also investigated with respirometric analysis, i.e., CO2 evolution rates and oxygen uptake rate (OUR). Among all trials, trial 1 (6 water hyacinth, 3 cattle manure, 1 rice husk) indicated the best composting mix, as shown by the highest temperature profile and OM loss, and lowest CO2 evolution rate and OUR.
Keywords: Cattle manure | Composting | Rotary drum | Stability | Water hyacinth
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