Journal ArticleDOI
Investigation of physico-chemical properties and microbial community during poultry manure co-composting process.
Omar Farah Nadia,Loo Yu Xiang,Lee Yei Lie,Dzulkornain Chairil Anuar,Mohammed P. Mohd Afandi,Samsu Azhari Baharuddin +5 more
TLDR
An investigation was carried out to study the extracellular enzymatic activities and structural degradation utilizing Fourier transform infrared spectroscopy, thermogravimetry and differential thermal analysis (TG/DTA) and scanning electron microscopy (SEM).Abstract:
Co-composting of poultry manure and rubber wood sawdust was performed with the ratio of 2:1 (V/V) for a period of 60 days. An investigation was carried out to study the extracellular enzymatic activities and structural degradation utilizing Fourier transform infrared spectroscopy (FT-IR), thermogravimetry and differential thermal analysis (TG/DTA) and scanning electron microscopy (SEM). The microbial succession was also determined by using denaturing gel gradient electrophoresis (DGGE). The compost was able to reach its highest temperature of 71°C at day 3 and stabilized between 30 and 40°C for 8 weeks. CMCase, FPase and β-glucosidase acted synergistically in order to degrade the cellulosic substrate. The xylanase activities increased gradually during the composting and reached the peak value of 11.637 U/g on day 35, followed by a sharp decline. Both LiP and MnP activities reached their peak values on day 35 with 0.431 and 0.132 U/g respectively. The FT-IR spectra revealed an increase in aromaticity and a decrease in aliphatic compounds such as carbohydrates as decomposition proceeded. TGA/DTG data exhibited significant changes in weight loss in compost samples, indicating degradation of organic matter. SEM micrographs showed higher amounts of parenchyma exposed on the surface of rubber wood sawdust at day 60, showing significant degradation. DGGE and 16S rDNA analyses showed that Burkholderia sp., Pandoraea sp., and Pseudomonas sp. were present throughout the composting process. Ornithinibacillus sp. and Castellaniella ginsengisoli were only found in the initial stage of the composting, while different strains of Burkholderia sp. also occurred in the later stage of composting.read more
Citations
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Relationship between bacterial diversity and environmental parameters during composting of different raw materials
TL;DR: The primary environmental factors affecting bacterial species were identified, and a strategy to enhance the abundance of uncultured bacteria through controlling relevant environmental parameters was proposed.
Journal ArticleDOI
Effect of thermo-tolerant actinomycetes inoculation on cellulose degradation and the formation of humic substances during composting
TL;DR: Redundancy analysis showed that the different inoculation phases had different impacts on the relationship between exogenous actinobacteria and physical-chemical parameters, so an optimized inoculation strategy to increase the content of humic substances, alleviate CO2 emission during composting is suggested.
Journal ArticleDOI
Co-Pyrolysis of Poultry Litter and Phosphate and Magnesium Generates Alternative Slow-Release Fertilizer Suitable for Tropical Soils
José Ferreira Lustosa Filho,Evanise Silva Penido,Patrícia Pádua Castro,Carlos Alberto Silva,Leônidas Carrijo Azevedo Melo +4 more
TL;DR: In this article, a novel approach aiming to add value to PL residue and to increase P use efficiency in acidic tropical soils was proposed, which was assessed by P-release kinetics in water, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and a bioassay with maize in a greenhouse using a clayey Oxisol.
Journal ArticleDOI
In-feed antibiotic use changed the behaviors of oxytetracycline, sulfamerazine, and ciprofloxacin and related antibiotic resistance genes during swine manure composting.
TL;DR: Redundancy analysis suggested that the abundance of ARGs had a considerable impact on alterations in the physicochemical parameters (C/N, pH and temperature) and bacterial communities (Actinobacteria, Proteobacteria and Firmicutes) during the composting of swine manure.
Journal ArticleDOI
Proliferation of antibiotic-resistant microorganisms and associated genes during composting: An overview of the potential impacts on public health, management and future.
TL;DR: In this article, the authors present a review of the literature on the origin and mechanisms of the proliferation of ARMs, ARGs, and MGEs during composting of livestock manure and evaluate the effectiveness of current composting protocols in the reduction or removal of emerging contaminants.
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