A Note on Self-heating and Spontaneous Combustion of Stored Sunflower Seed Cake and Cotton Seeds

Susan M. A. El-Nazir, Ibrahim H. Babikir, Mahdi A. S. Shakak, Ilham A. Sulieman, Raian M. Medani

Abstract


Sunflower seed cake and cotton seed warehouses combusted spontaneously
and burnt in August and November 2009, respectively, in Khartoum North industrial area. The objective of this study was to determine some of the reasons for self-heating and spontaneous combustion. Representative samples from the two warehouses were collected. Aspergillus niger, A. flavus, Paesiolomyces sp., Rhizopus oryzae, Absidia sp.
were isolated at 37oC. Bacillus thuringiensis was isolated at 37oC, and B. pantothenticus, B. ciculans, B. licheniformis, B. sphaericus, B. badius, Escherichia coli and Klebsiella sp. were isolated at 60oC. A decrease in oil, fibre and phosphorus and increase in free fatty acids and protein contents were detected.

Keywords


Self-heating; combustion; sunflower seed cake; cotton seeds

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