Production of organic fertilizer based on sewage sludge cultivated with grass under an aeration system

• Published in: Revista Ceres Vol. 68; no. 5; pp. 471 - 483
• Main Authors: Cardoso, Paulo Henrique Silveira, Gonçalves, Paula Wellen Barbosa, Alves, Gustavo de Oliveira, Pegoraro, Rodinei Facco, Sampaio, Regynaldo Arruda
• Format: Journal Article
• Language: English
• Published: Vicosa Universidade Federal de Viçosa-UFV, Revista Ceres 01.10.2021; Universidade Federal de Viçosa; Universidade Federal De Viçosa
• Subjects: Aeration; AGRICULTURE, MULTIDISCIPLINARY; biodegradation; biosolid; Cultivation; Evaluation; Experiments; Fertilizers; Grasses; Humidity; Landfills; Operating costs; Organic fertilizers; Organic matter; Pathogens; residue recycling; Sewage analysis; Sewage sludge; Sludge; Urochloa brizantha; Variance analysis; Waste disposal sites; Waste management; Wastewater treatment; Wastewater treatment plants; organic matter; residue recycling; biodegradation; biosolid
• ISSN: 0034-737X; 2177-3491; 2177-3491
• DOI: 10.1590/0034-737x202168050012

ABSTRACT The cultivation of grasses in sewage sludge (SS) with aeration has the potential for stabilization of sludge organic matter in the production of organic fertilizer. [...]the objective of this work was to evaluate the cultivation of Urochloa brizantha and Pennisetum purpureum under aerated system on the chemical and biological attributes of SS to obtain a matured organic fertilizer. INTRODUCTION The high volume of sewage sludge (SS) produced at the wastewater treatment plants (WWTP) has burdened the disposal of this waste in landfills, since its management may reach 60% of the operating costs of a WWTP (Godoy, 2013). The hypothesis of this study is that the cultivation of grass in sewage sludge intercropped with its aeration may stabilize the organic matter of the SS, providing the production of a better-quality organic fertilizer. [...]the objective was to evaluate the interference of the cultivation of P. purpureum U. brizantha under an aerated system on chemical and biological attributes of SS to obtain a matured organic fertilizer. According to the Köppen's classification, the predominant climate in the region is the Aw - tropical savannah with rainy summer and dry winter. The data obtained from the sewage sludge analyses were subjected to analysis of variance, with treatment unfolding in orthogonal contrasts, by applying the F test at 0.05 probability.