Improving the quality of organic compost of sewage sludge using grass cultivation followed by composting

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dc.creatorPaulo Henrique Silveira Cardoso
dc.creatorPaula Wellen Barbosa Gonçalves
dc.creatorGustavo de Oliveira Alves
dc.creatorRodinei Facco Pegoraro
dc.creatorLuiz Arnaldo Fernandes
dc.creatorLeidivan Almeida Frazão
dc.creatorRegynaldo Arruda Sampaio
dc.date.accessioned2023-11-28T00:29:24Z
dc.date.accessioned2025-09-08T23:27:03Z
dc.date.available2023-11-28T00:29:24Z
dc.date.issued2022
dc.identifier.issn0301-4797
dc.identifier.urihttps://hdl.handle.net/1843/61429
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Environmental Management
dc.rightsAcesso Restrito
dc.subjectBiodegradação
dc.subjectFertilizantes organicos
dc.subjectResíduos sólidos
dc.subject.otherBiodegradation
dc.subject.otherBiosolid
dc.subject.otherOrganic fertilizer
dc.subject.otherWaste recycling
dc.subject.otherWaste treatment
dc.titleImproving the quality of organic compost of sewage sludge using grass cultivation followed by composting
dc.typeArtigo de periódico
local.citation.epage8
local.citation.spage1
local.citation.volume314
local.description.resumoComposting is one of the main processes of stabilization of sewage sludge and its association with cultivation in this residue has a great potential to produce stabilized organic fertilizer and, or substrate for plant development. The aim of this work was to evaluate the physical, chemical, and microbial attributes of sewage sludge (SS) aerated and cultivated with Pennisetum purpureum or Urochloa brizantha and, later, composted. The study was installed in a 2x2+2 factorial scheme, with four replications. The factors consisted of cultivation of P. purpureum or U. brizantha in SS for 90 days, with or without intermittent aeration for 60 days. The control treatments were SS without cultivation, with the presence or absence of aeration. After 90 days of cultivation, the grass was cut, crushed, and incorporated into the SS for composting for 60 days. The composted sewage sludge showed an increase of 26, 24, 17, 123, 19, 32, and 7.7% in the levels of P, Ca, Cu, Fe, Mn, Zn, and Pb; and a reduction of 22, 5.2, 26, 30, 8.8, and 70% in the levels of C, N, K, Mg, Ni, and Na, respectively. The levels of Cu, Ni, Zn, and Pb remained below the maximum limit allowed by environmental resolution. The degradation of SS decreased the particle diameter, increasing the bulk density and total porosity, improving the physical properties of the compost. The SS cultivation and composting, regardless of the grass, led to a reduction in pH, basal and accu- mulated respiration, nitrification index, and C/N ratio and an increase in the CEC/C ratio, showing adequate maturation of the compost produced. Thus, the SS cultivation and composting with grasses were effective for producing matured and quality organic compost with low risk of environmental contamination.
local.publisher.countryBrasil
local.publisher.departmentICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS
local.publisher.initialsUFMG
local.url.externahttps://doi.org/10.1016/j.jenvman.2022.115076

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