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Journal of Advances in Microbiology, 2456-7116,Vol.: 6, Issue.: 4


Utilization Potential of Kitchen Waste Sludge as Organic Fertilizer


B. A. Oso1, T. A. Ogunnusi1* and C. O. Adeleye1

1Department of Biological Sciences, Afe Babalola University, P.M.B. 5454, Ado Ekiti, Ekiti State, Nigeria.

Article Information
(1) Jeyabalan Sangeetha, Department of Environmental Science, Central University of Kerala, India.
(1) C. M. Narayanan, National Institutes of Technology, India.
(2) Narcis Barsan, Vasile Alecsandri University of Bacau, Romania.
Complete Peer review History: http://www.sciencedomain.org/review-history/22015


Aim: To investigate the possible conversion of kitchen waste sludge into organic fertilizer using a bio-treatment agent.

Place and Duration of Study: The study was carried out at Afe Babalola University in the green house and the Kitchen waste sludge was obtained from the open drain behind Cafeteria 2 on Campus.

Methodology: Microbial analyses of kitchen waste sludge were carried out using the pour plate method to isolate and identify bacteria and fungi. Treatment of kitchen waste sludge with OBD-plus a biotreatment/bioremediation agent was done and plant growth trials with maize carried out in the green house with both treated and untreated kitchen waste as biofertilizer. Physicochemical analyses were carried out on both the treated and untreated kitchen waste sludge.

Results: Six microorganisms were isolated. These included three bacteria; Bacillus sphaericus, Bacillus cereus and Bacillus anthracis while the fungi were Aspergillus niger, Aspergillus flavus and Penicillum citrinum. All these isolates grew on engine oil and vegetable oil agar as carbon source. Using the one-way Analysis of Variance at a level of 0.05(95%), the P value was ≤ 0.05 which showed that there is a statistical significant difference between the treated and untreated samples. The pH for the untreated kitchen waste (UKW) was 5.92 while for the treated kitchen waste (TKW), it was 5.60. The moisture content (%) for UKW was 44.60 and 23.22 for TKW. % dry matter for UKW=55.40 and TKW=76.78, % total nitrogen for UKW and TKW=18.48 and 23.04 respectively, total phosphorus for UKW=0.079% while TKW=0.222%. Potassium as k20 for UKW=3.6% and TKW=6.3%, oil content for UKW=59.26%, TKW=21.54%, Zinc concentration in UKW=6.6ppm and TKW=0.85ppm, Lead concentration in the UKW=0.57ppm and TKW=0.33 ppm. Plant growth trials of maize using treated and untreated kitchen waste as bio-fertilizer and mixed with sand were carried out in the green house. Good growths of maize were observed in the soil with treated kitchen waste while the growths on the untreated waste dried up and died after some days.

Conclusion: The kitchen waste sludge treated with OBD-plus supported the growth of maize when compared to the untreated. There was also a reduction in the level toxic/heavy metals present while there was an increase in the level of some elements such as magnesium. This study shows that with biotreatment, kitchen waste can serve as biofertilizers. The limitation of this study is that the kitchen waste was not collected at random and is a representation of a specific case.

Keywords :

Kitchen waste; biotreatment; biofertilizer; analyses.

Full Article - PDF    Page 1-9

DOI : 10.9734/JAMB/2017/37358

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