Abstract
The aim of the present study was to evaluate the chemical alterations in substrates of vermicomposts from domestic sewage sludge and from cattle manure, besides its quality as an organic fertilizer. Elemental and infrared analysis and UV-Vis spectroscopy were used for their characterizations. Chemical characteristics determined in the vermicomposts indicate that they can be used as organic fertilizers, mainly with regard to organic matter content, pH, C/N ratio, and nitrogen and phosphorus levels. The main constituents of the humic substances extracted from the vermicomposts were obtained by pyrolysis coupled to gas chromatography-mass spectrometry (GC/MS), showing that these compounds are quite similar, despite being produced by domestic sewage sludges or by cattle manure.
Highlights
Many composts obtained from cattle manures, domestic sewage sludges or household wastes, as well as other organic wastes, can be applied in agriculture soils, after reaching its chemical stability
The moisture content of the SSV reached (48.19 ± 0.33)% and of the CMV reached (53.36 ± 2.97)%, both are close to the maximum limit of 50% established by brazilian legislation for composted solid wastes used as fertilizer.[29]
The Fourier transformer infrared (FTIR) spectra show the difference between the humic substances from CMV and the humic substances from SSV
Summary
Many composts obtained from cattle manures, domestic sewage sludges or household wastes, as well as other organic wastes, can be applied in agriculture soils, after reaching its chemical stability. This practical can be a really great tool for an adequate residue discharge and represents a management strategy that could counteract depletion of organic matter in soils. The addition of organic compost to soils requires that it presents an adequate degree of maturity, which implies stable organic matter content and the absence of phytotoxic pathogenic compounds for plants or animals.[1,2].
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
