Stabilization of confined beef cattle manure: characteristics of produced fertilizers

Abstract

ABSTRACT:The growing demand for animal protein is directly related to the feedlot system of animals and their assumptions, such as the waste management. The characterization of the final products becomes an important factor in decision making by one or by other process. The objective was highlight characteristics that fertilizers present due to the used of stabilization process, by the principal component analysis. For the manure stabilization we realized three aerobic processes, composting, vermicomposting and natural decomposition, and one anaerobic, the anaerobic digestion. These processes produced the compost, the vermicompost, the decomposed manure and the biofertilizer. Fertilizers produced were analyzed by means of seventeen chemical and physicchemical parameters. The main differences are related to stability and organic matter content. The compost is more stable fertilizer and decomposed manure is the worst. The vermicompost is presented as the best option to adsorb cadmium and lead. The biofertilizer has the lowest values of pH, CEC and adsorptive capacity of heavy metals (Cd and Pb). The decomposed manure in presence of precipitation, and the vermicompost, with significant irrigation, generates fertilizers with smaller source of potassium.

Spectroscopic and Physicochemical Characterization of Poultry Waste-Based Composts and Charcoal–Compost Mixtures for the Prediction of Dry Matter Yield of Giant of Italy Parsley

“…Total organic carbon (TOC) of the organic amendments was determined gravimetrically according to Cunha-Queda et al [34]. The C:N ratio was calculated from the values of TOC and N [35]. Cation exchange capacity (CEC) was determined by titration with a calcium acetate solution and activated charcoal according to the EMBRAPA method [36].…”

“…Conversely, high H LIF values were associated with a high concentration of aromatic groups in the amendments, compared with initial TOC, i.e., a higher degree of humification for SA and BA amendments. Interestingly, the addition of charcoal to the composts caused a reduction in H LIF value (Figure 2b), an indication that charcoal diluted the polyphenols and reduced the aromaticity of the composts [22,35], thereby reducing the degree of humification of the organic amendments. The results suggest that addition of charcoal to composts cannot be considered a method to enhance humification.…”

Addition of Boiler Charcoal Waste to Compost for Use as Substrate for Vegetable Seedlings

“…In an inventory of organic waste for use as substrates performed by Abad et al (2001), it was found that almost half (46%) of the 63 organic materials studied presented suboptimal OM levels. OM levels below the recommended value (>80%) in composted substrates are expected, due to the microbiological degradation of organic fractions and consequent release of C as CO2 (Costa et al, 2016(Costa et al, , 2017Lorin et al, 2016). As a result, a concentration of macro and micronutrients can be observed (Costa et al,2017;Gavilanes-Terán et al, 2017) (Table 3).…”

Aguas residuales de industria láctea como alternativa sostenible para aumentar la productividad del maíz en Perú

“…Tradicionalmente la producción de biofertilizante se ha realizado empleando como sustrato estiércol de ganado bovino junto con otros compuestos orgánicos (Lorin et al, 2016;Montoro et al, 2019). Adicionar lactosuero como sustrato en la producción de biofertilizante incrementa sus propiedades beneficiosas ya que estimula al desarrollo de las plantas (Caballero et al, 2020).…”