Percolate Quality in Soil Cultivated With Application of Wastewater From Swine Slaughterhouse and Dairy Products

Abstract

ABSTRACT:The objective of this study was to evaluate the quality of the percolate in soil columns cultivated with Tiffon-grass 85 under different wastewater rates from swine slaughterhouse and dairy. The experiment was conducted at the Department of Engineering at the Federal University of Lavras, in PVC columns with 0.30 m of diameter and 1.2 m deep, filled with Dark Red Latosol cultivated with Tifton-grass 85. The treatments consisted of a (AQT0) control with recommended chemical fertilization for Tifton-grass 85 (300 kg ha -1 year -1 of N), and four doses of SSW and DPW (100, 200, 300 and 400% of the recommendation) in a CRD with 3 replications. The samples of percolated were collected and characterized weekly. The treatments of highest dosage have obtained COD, after 120 days, of 47.7 mg L -1 (AAT3) and 38.6 mg L -1 (AAT4). Although nitrate concentrations were elevated on the earlier months, the greater assimilation of nutrients by the Tifton-grass 85 and the reduction of the mineralization of organic material resulted in lower nitrate concentrations of 10 mg L -1 .

Optimization of the Coagulation–Flocculation Process for Slaughterhouse Wastewater Using Response Surface Methodology

“…[ 42 ] In some studies, it has been stated that it may be advantageous to use different wastewater sources in pasture irrigation: sewage waste [ 41,43 ] or cattle waste. [ 44 ] In some studies in which slaughterhouse wastewater was used as irrigation water, the quality of the soil in nitrogen percussion [ 45 ] and the phytotoxicity of cucumber and lettuce seeds in the course of germination [ 46 ] were investigated. The soil quality and the properties of sunflower and corn, [ 47 ] pasture, [ 48 ] and hay farming, [ 49 ] which used slaughterhouse wastewater as irrigation water, were also examined.…”