| Pak. J. Bot., 39(1): 271-277, 2007. | Back to Contents | ||||
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Updated: 09-07-09 | ||||
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MUNICIPAL SOLID WASTE COMPOSTING AND ITS ASSESSMENT FOR REUSE IN PLANT PRODUCTION SEEMA JILANI Abstract: A pilot study was conducted to assess the feasibility of composting
of source separated organic matter of municipal solid waste (MSW) generated
in low, middle and high income areas of Karachi city with a population
over 14 million. Results of MSW analysis indicate the presence of high
percentage of biodegradable organic matter (71-74%), acceptable moisture
content (40-50%) and C/N ratio (38-40:1). On windrow composting, not
only the volume of waste was reduced but also produced a crumbly earthy
smelling soil-like, compost material. All quality parameters in the
compost samples were found to be within the acceptable limits set by
international standard. The pH ranged between 6.8-8.1, soluble salts
3.90-5.10 mS/cm, organic matter 45-60% and have an acceptable amount
of plant nutrients (Nitrogen 0.91-1.35%, Phosphorus 0.42-0.85%, Potassium
1.00-1.80%). The compost quality could further be improved by adding
cow manure, poultry manure or yard waste etc. Its use in plant production
or land reclamation may be helpful to maintain soil fertility and improve
moisture holding capacity. MSW composting could be adapted country wide
to recycle/reuse the organic residues as solid waste management option.
Department of Science, Textile Institute of Pakistan, City Campus:
10F, Block-6, PECHS, Karachi-75400, Pakistan. |
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