International Journal of Modern Biological Research
ISSN: 2053-180X
Vol. 5(1), pp. 1-7, February 2017



Oryza sativa wastes management in Ghana using Pleurotus ostreatus strain EM-1 and its nutritional value

Wiafe-Kwagyan M.1*, Odamtten, G. T.1, Obodai M.2 and Kortei N. K.3

1University of Ghana, Department of Plant and Environmental Biology, P. O. Box LG 55, Legon, Accra School of Biological Sciences, College of Basic and Applied Sciences.
2CSIR-Food Research Institute, Mycology Unit, P. O. Box M20, Accra, Ghana.
3University of Health and Allied Sciences, School of Allied Health Sciences, Department of Nutrition and Dietetics, P. M. B. 31, Ho, Ghana.

*To whom correspondence should be addressed. E-mail: wiakwa@yahoo.com.

Received 5 January, 2017; Received in revised form 6 February, 2017; Accepted 8 February, 2017.

Abstract


Keywords:
Rice wastes, Treatment, Nutrient and mineral contents, Pleurotus ostreatus.


Mushroom cultivation has proved its economic strength and ecological importance for efficient utilization, value-addition and biotransformation of agro-industrial residues into protein food. Large quantities of rice lignocellulose wastes are generated through agro-industrial activities each year and often underutilized leading to serious environmental pollution problems. These wastes can potentially be bio-converted into value-added products such as pulp, animal feed and bio-fertilizer through the action of lignin-degrading enzyme from fungi such as mushrooms. Effect of raw and fermented rice wastes on the mycelial growth, yield performance and biological efficiency of Pleurotus ostreatus strain EM-1 was investigated. Data obtained indicate that treatment and supplementation of substrate did not significantly (p≥0.05) enhance yield of P. ostreatus. Nutritional and mineral content of P. ostreatus differed in most instances depending on substrate treatment although some did not vary statistically (p≥0.05). Considerable amount of important minerals such as Na, Ca, K, Mg and P were detected in the fruiting body of P. ostreatus with some heavy metals (Cu, Fe, Mn, Zn and Pb). However, heavy metals were at levels far below the World Health Organization (WHO) recommended safe limits. High preponderance of K over Na recorded in the fruiting body of P. ostreatus makes it an ideal food for patients suffering from hypertension and heart diseases. This research has demonstrated the potential use of P. ostreatus to management rice wastes in Ghana. The shorter period of fermentation (0 – 12 days) gives it an advantage over the wawa sawdust (Triplochiton scleroxylon) which required 28 days composting period for cultivation of the same quantity of mushroom.

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