Journal
BIORESOURCE TECHNOLOGY
Volume 100, Issue 24, Pages 6442-6450Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2009.07.030
Keywords
Solid waste; Rotary drum composter; Temperature; Compost dynamics; Vermicomposting
Funding
- Department of Science and Technology (DST), Government of India
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High rate composting studies on institutional waste, i.e. vegetable wastes, tree leaves, etc., were conducted on a demonstration-scale (3.5 m(3)) rotary drum composter by evaluating changes in some physico-chemical and biological parameters. During composting, higher temperature (60-70 degrees C) at inlet zone and (50-60 degrees C) at middle zone were achieved which resulted in high degradation in the drum. As a result, all parameters including TOC, C/N ratio, CO2 evolution and coliforms were decreased significantly within few days of composting. Within a week period, quality compost with total nitrogen (2.6%) and final total phosphorus (6 g/kg) was achieved; but relatively higher final values of fecal coliforms and CO2 evolution, suggested further maturation. Thus, two conventional composting methods namely windrow (M1) and vermicomposting (M2) tried for maturation of primary stabilized compost. By examining these methods, it was suggested that M2 was found suitable in delivering fine grained, better quality matured compost within 20 days of maturation period. (c) 2009 Elsevier Ltd. All rights reserved
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