Abstract
This study was aimed at investigating the physico-chemical and microbial diversity for rapid composting of sugarcane press mud (PM) leading to organic manure. Five bacterial strains (Cellulomonas sp., Klebsiella sp., Proteus sp., Enterobacter sp., Salmonella sp.) were tested under in vivo conditions for bioconversion of PM using pile method. Results revealed that combined inoculation of bacterial consortia was found to be the best decomposer of PM resulting reduction of organic carbon content (26.75%), C:N ratio (12.44%). In parallel, it increased the nitrogen (2.34%), phosphorous (1.15%) and potassium (1.37%) content along with the population of microorganisms i.e. bacteria, fungi and actinomycetes. However, the population of tested bacteria was gradually depleted after completion of PM decomposition together with pathogenic bacteria and fungi due to full conversion of carbon component into other minerals, i.e. N, P, K etc. Taken together, these findings certainly pinpoints the effective role of bacterial suspension for composting sugarcane press mud which the eventually be used as organic manure.
Highlights
For year’s sugar industries faced a major challenge in proper utilization of the wastes generated in the process of sugar manufacturing in their plant
Five bacterial strains i.e. Cellulomonas sp. (HSMPM-2), Klebsiella sp. (HSMPM-4), Proteus sp. (HSMDP-2), Enterobacter sp. (HSMPM-3) and Salmonella sp
At the initial stage of composting, the moisture content of all piles was around 62-64%; it dropped gradually during composting time (Fig. 1)
Summary
For year’s sugar industries faced a major challenge in proper utilization of the wastes generated in the process of sugar manufacturing in their plant. There is considerable economic interest in the technology and development processes for effective utilization of these wastes (Zhang et al, 2000). Sugarcane is constituted by four major fractions, whose relative magnitude depends on the sugar agroindustrial process: fiber, nonsoluble solids, soluble solids, and water. The fiber is composed of the whole organic solid fraction, originally found in the cane’s stem, and characterized by its marked heterogeneity (Triana et al, 1990). Sugarcane press mud is the residue of the filtration of sugarcane juice. Large amounts of press mud are released by the sugarcane industry and the disposal of this by-product is a major issue. Most of the part of these wastes is usually burnt in the field due to lack of proper management techniques, which creates severe environmental pollution and health hazards (Pandit et al, 2012)
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