Status : Verified
| Personal Name | Dela Cruz , Roy Searca Jose P. |
|---|---|
| Resource Title | Fate of antibiotics in composting poultry manure using microorganisms from vermicompost. |
| Date Issued | 07 September 2021 |
| Abstract | The extensive use of antibiotics for therapeutic and prophylactic utilization in livestock production has increased the possibility of antibiotic pollution of our environment. Antibiotic pollution poses a range of risks to human health, economic productivity, ecosystem services and long term sustainability of agricultural activity. Composting is an accepted recycling and reuse technique for manure, turning the waste into a valuable resource. However, the efficiency in removing pollutants of emerging concern such as antibiotic needs improvement. In the study, microorganisms were isolated from vermicompost and evaluated as inoculant in composting chicken manure spike with antibiotics. Aspergillus niger and Aspergillus flavus were isolated from vermicompost and evaluated as to antibiotic resistance and potential for mass production as inoculant. Results showed that the fungal species showed increased growth in the presence of various concentration of antibiotics and had luxuriant growth in various substrate tested. Inoculant induced composting registered 83-93% removal of tylosin and 50-65% removal for oxytetracycline. The inoculant were among the primary fungal species observed during the time of significant antibiotic removal. Biodegradation was the primary removal pathway for tylosin, and enzymes associated with the inoculant may also have contributed to tylosin removal through oxidation. Temperature was the main factor affecting the removal of oxytetracycline. Thermophilic temperature was not observed during the study thus resulting in low oxytetracycline removal efficiency. A. flavus and A. Niger together with other fungal species observed (Lichthemia romosa, Trichosporon asahii and Cladosporium oxysporum) may contribute to improving the removal efficiency of antibiotics during inoculant induced composting of chicken manure. |
| Degree Course | PhD Environmental Engineering |
| Language | English |
| Keyword | antibiotics; Aspergillus flavus; Aspergillus niger; composting; oxytetracycline; tylosin |
| Material Type | Thesis/Dissertation |
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