Treatment of organic solid waste for reuse: A step towards zero waste. | [Science Vision • 2013]

Author(s):

1. Mohsin Ali: Department of Agricultural Engineering, Bahudding Zakariya University, Multan, Pakistan

2. Zahid Mahmood Khan: Department of Agricultural Engineering, Bahudding Zakariya University, Multan, Pakistan

3. Jehangir Sial: Department of Agricultural Engineering, Bahudding Zakariya University, Multan, Pakistan

4. M. H. Mahmood: Department of Agricultural Engineering, Bahudding Zakariya University, Multan, Pakistan

5. H. Shahid Rafiq: Department of Agricultural Engineering, Bahudding Zakariya University, Multan, Pakistan

6. Musharib Khan: Department of Agricultural Engineering, Bahudding Zakariya University, Multan, Pakistan

7. Imran Ali: Department of Agricultural Engineering, Bahudding Zakariya University, Multan, Pakistan

8. Iftikhar A. Raja: Department of Environmental Science, COMSATS Institute of Information Technology, Abbottabad (CIIT), Abbottabad, Pakistan

Abstract:

Large amounts of organic solid wastes are being generated from municipal, industrial and agricultural activities. After necessary processing, the organic solid waste can be reused for agriculture not only as a nutrient supplement for plant growth, but also as a conditioner for seedbed soil. Processed organic wastes may improve soil structure and enhance water and nutrient-holding capacity of the soil, as well as increase the microbial activity within the soil, thereby increasing soil fertility. In this study, problems like undesirably high moisture contents and large volumes per unit weight of the processed organic solid wastes have been addressed through pelletization. Physical properties like durability, percent of fines content, and bulk and particle density of the processed and pelletized organic waste have been investigated, and the optimum values for storage, handling and transportation of the pelletized organic waste have been determined. Three different sizes of extruding sieve (4.35, 6.35 and 7.9 mm) and three different waste-mixing ratios (1:1:2, 1:2:2 and 1:3:3) of farmyard waste, wastewater sludge and sugar industry press mud were used respectively for the production of bio-solid pellets. The physical properties of the palletes show that durability increases by increasing the amount of sewage sludge while fines content, bulk density and unit density decrease. The large sieve size has more durability and less fine content. The results showed that the pelletization technique can be efficiently used by the farmers and appears to be a good option for sustainable management and re-use of organic solid wastes. Farmyard Manure, Sewage Sludge, Pellets, Sieve Size, Durability.

Page(s): 63-68

DOI: DOI not available

Published: Journal: Science Vision, Volume: 19, Issue: 1--2, Year: 2013

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