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New York Science Journal
(N Y Sci J)
ISSN 1554-0200 (print); ISSN 2375-723X (online),
doi prefix: 10.7537, Monthly
Volume 18 -
Number 5 (Cumulated No. 195); 25, 2025
Cover (docx),
Cover (pdf),
Introduction,
Contents,
Call for
Papers
The following manuscripts are presented as online first for peer-review, starting from April 25, 2025.
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CONTENTS
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Evaluation of Bacillus Subtilis Inoculation for
Bioconversion of Organic Solid Wastes (Maize Husk, Cowpea Husk
and African Spinach) Into Biofortified Compost
1Oladapo
Zainab Abosede and 2Bukola Catherine Akin-Osanaiye
1Department Of Microbiology, Faculty Of
Science, University Of Abuja, P.M.B. 117, Abuja, Nigeria 2Department
Of Biochemistry, Faculty Of Science, University Of Abuja, P.M.B.
117, Abuja, Nigeria
1Email:
oladapozainababosede@gmail.com
Abstract: This study focused
on the Evaluation of Bacillus subtilis inoculation for
bioconversion of organic solid wastes (maize husk, cowpea husk
and African spinach) into biofortified compost. Ten (10)
kilograms of carbon-based organic wastes comprising of maize
husk wastes, 5 kg of nitrogen based organic wastes which
comprises of beans husk wastes and the cofactor which is
vegetable (African spinach) wastes combined in the ratio of
2:1:1, 3:2:1 and 4:3:2 were used for the composting set up. The
organic waste with 4:3:2 combination had the highest (p<0.05)
proximate values of 24.70±3.2 % for ash content and the lowest
lipid recorded 3.01±0.1 % as the least. The biofortified compost
temperature was monitored during the period of composting. The
initial temperature of the three organic wastes composition
(2:1:1, 3:2:1 and 4:3:2) inoculated with Bacillus subtilis
as well as their controls after mixing was 26.5 °C for day one
and rose to 43.2 0C at day 30 while the control
temperature was 29.4 0C. The initial pH of the
biofortified compost (day 1) was 6.4 for all ratios. For the
2:1:1 combination, the pH increases from 6.4 to 6.5 at day 40 up
till day 60 and for 3:2:1 and 4:3:2 combinations ratio the pH
increases from 6.4 to 6.7. As the composting progress, the
organic matter and organic carbon decrease from the day one to
day 60 for all the combinations. The substrates mixtures showed
an initial electrical conductivity (EC) of 1.8 dSm-1
from the first day. It reached up to 2.19 dS m-1 for
2:1:1, 2.23 dS m-1 for 3:2:1 and 2.35 dS m-1
for 4:3:2 with progressive degradation up to 60 days meanwhile,
the control only increased from 1.8 dS m-1 to 1.9 dS
m-1. Compost analysis of the organic waste inoculated
with Bacillus subtilis showed a good C:N ratio and
increased value of phosphorus and nitrogen up till day 60 which
are required for enhancement of soil fertility. The compost
generated from the degradation can be applied to increase the
fertility of the soil.
[Oladapo Zainab Abosede, Bukola Catherine Akin-Osanaiye.
Evaluation of
Bacillus Subtilis Inoculation for Bioconversion of Organic
Solid Wastes (Maize Husk, Cowpea Husk and African Spinach) Into
Biofortified Compost.
N Y Sci J
2025;18(5):1-10].
ISSN
1554-0200 (print); ISSN 2375-723X (online).
http://www.sciencepub.net/newyork.
01.
doi:10.7537/marsnys180525.01
Keywords:
Organic waste; Bacillus subtilis; biofortified compost;
bioconversion |
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The manuscripts in
this issue were presented as online first for peer-review,
starting from , 2025.
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welcome: newyorksci@sciencepub.net.
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