Vol 9 Issue 3 July 2022-September 2022
Orose, E., Sikoki, F.D., Vincent_Akpu, I.F.
Abstract: The study investigated the nutritional quality of bacterial composted substrates. The substrates namely: Cow hoof (1), chicken feather (2), egg membrane (3), hair waste (4) and cow horn (5)were subjected to bacterial composting for 42 days using bacillus subtilis. The substrates were collected and characterized physic-chemically and microbiologically. During the composting process, parameters such astemperature, total organic carbon (TOC), potassium, phosphorus, rate of degradation (ROD), pH, moisture content, ash, carbohydrate, crude protein, fibre, fat and bacterial counts; were monitored using standard methods. The results showed that physico-parameters measured were significantly different (p<0.05) among the substrates. Total organic carbon (%) before and after composting for substrates 1, 2, 3, 4 and 5 was 4.06 and 2.21, 12.79 and 0.51, 18.02 and 2.18, 20.34 and 2.10 and 9.01 and 3.80 respectively. Total protein (%) before and after composting was 62.7 and 58.5, 64.6 and 63.4, 1.60 and 1.53, 26.4 and 24.2 and 34.8 and 31.8, respectively.Total heterotrophic bacterial counts (103CFU/g) before and after composting was 6.4 and 5.48, 5.0 and 5.5, 6.0 and 4.38, 1.32 and 5.40 and 4.8 and 5.2, respectively. The ROD of substrate 2 was highest (96%), followed by substrate 4 (89.7%). The study suggests that substrate 2(chicken feather) has higher nutritional values and may be composted for fish and livestock feed formulation. This research is an important step toward the establishment of environmentally friendly technology for the treatment of keratin wastes in Nigeria.
Keywords: degradation, nutritional values, waste management and keratinase.
Title: NUTRITIONAL QUALITY OF BACTERIAL COMPOSTED SUBSTRATES
Author: Orose, E., Sikoki, F.D., Vincent_Akpu, I.F.
International Journal of Recent Research in Life Sciences (IJRRLS)
ISSN 2349-7823
Vol. 9, Issue 3, July 2022 - September 2022
Page No: 19-28
Paper Publications
Website: www.paperpublications.org
Published Date: 20-August-2022