Title: Changes in the chemical characteristics of a planossol, in elephant grass cultivation - BRS capiaçu, after application of treated wastewater

Authors: Thais Girardi Carpanez; Jonathas Batista Gonçalves Silva; Mayara de Oliveira Gonçalves; Vanessa Romário de Paula; Marcelo Henrique Otenio; Samuel Rodrigues Castro

Addresses: Engineering School, Federal University of Minas Gerais, Campus Pampulha, 31270-901, Belo Horizonte/MG, Brazil ' Department of Environmental and Sanitary Engineering, Engineering College, Federal University of Juiz de Fora, 36.036-330, Juiz de Fora/MG, Brazil ' Federal University of Juiz de Fora, 36.036-330, Juiz de Fora/MG, Brazil ' Brazilian Agricultural Research Corporation, EMBRAPA, Gado de Leite, 36038-330, Juiz de Fora/MG, Brazil ' EMBRAPA Gado de Leite, Ecology at the Federal University of Juiz de For a, 36038-330, Juiz de Fora/MG, Brazil ' Department of Environmental and Sanitary Engineering, Engineering College, Federal University of Juiz de Fora, 36.036-330, Juiz de Fora/MG, Brazil

Abstract: The present study evaluates chemically the soil after an application of treated wastewater originated through anaerobic digestion of dairy cattle wastewater in the cultivar Pennisetum purpureum (BRS Capiaçu). Developed in an experimental field at the Brazilian Agricultural Research Corporation - Embrapa Gado de Leite located in Coronel Pacheco/MG - from November 2017 to July 2018. The applications were performed by applying different doses of treated wastewater in slides of 0, 24, 48, and 72 mm cycle^-1. For each experimental plot, soil collections were executed in two different layers (0-20 and 40-60 cm) and their characterisations were made before and after the applications. The use of treated wastewater proved to be efficient for fertigation of capiaçu grass since it provided, in the root zone of the plant, an increase in essential nutrients for its growth. The leaching of the analysed metals was not observed, and the 72 mm cycle^-1 slide was determined as the best disposal dose of the effluent in the soil since it was able to increase the crops height, dry and green mass.

Keywords: anaerobic digestion; fertigation; waste; soil; treated wastewater.

DOI: 10.1504/IJEWM.2024.140968

International Journal of Environment and Waste Management, 2024 Vol.34 No.4, pp.454 - 471

Received: 15 Mar 2021
Accepted: 02 Mar 2022
Published online: 05 Sep 2024 *

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