Microbiological Activity During the Composting of Wastes From Broiler Productive Chain

Abstract

The quality of the carbon used as bulking agent in the composting process directly affects the dynamics of the waste degradation, which is governed by an active and diversified microbiota. The monitoring of the basal respiration and enzymatic activities during the composting of broiler agro-industrial wastes with different carbon sources as bulking agents was the aim of this study. The microbiological activities were more intense in the thermophilic phase of the process. The dynamics of the enzymatic activities were affected by the different carbon sources used as bulking agent in the composition of the windrows. When the milled sugarcane bagasse was used as carbon source, the windrow presented the highest amount of P in its constitution and presented, in the evaluation averages, a greater intensity of the alkaline phosphatase enzyme (842 μg g-1 h-1 p-nitrophenol compost); the highest intensities of β-glucosidase and cellulase enzymes were observed when fresh and ground napier grass was used as the main source of carbon (6.1 μmol g-1 h-1 p-nitrophenol compost and 35.2 μmol g-1 16h-1 glucose compost, respectively); the highest intensity of the urease enzyme was also observed in the windrow where napier grass was used as the main carbon source and bulking agent (205,890 μmol g-1 2 h-1 N-NH 4+ compost). It can be concluded that napier grass when used as the main source of carbon and bulking agent in the composting of the wastes from broiler chicken production chain promotes greater intensity of most of the enzymatic activities of interest. The enzymatic activity of urease presented the highest values due to the high nitrogen content of the composted wastes.

Thermo-resistant enzyme-producing microorganisms isolated from composting

“…Microbial enzymes involved in the composting process as cellulases, amylase, β-glucosidases, proteases, ureases, phytase, phosphatases, and arylsulphatases are potential candidates for biotechnological applications. These enzymes are active in cellulose depolymerization, hydrolysis of amide and glycosidic bonds, nitrogen mineralization, and release of phosphate and sulfate groups from organic compounds (Bernardi et al, 2018). In this study, we tested three enzymes production by microorganisms isolated from organic composting: amylase, phytase, and cellulase.…”

Composting Process in the Production of Lettuce Seedling Substrates: Effect of Covering and Turning Frequency

“…The use of agro-industrial residues from a broiler production chain (BPC) based on biological stabilization processes presents advantages from an environmental and economic point of view because it promotes the stabilization of environmental problems (Costa et al, 2009) and allows its commercialization as an agricultural input. The stabilization of these organic residues through the composting process has been reported both in the national (Costa et al, 2016;Bernardi et al, 2018) and international literature (Costa et al, 2017;Chiarelotto et al, 2019).…”

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

“…Besides the degree of humification, special attention should be given to toxic elements that might be present in the organic amendments [12,20]. For example, some agro-industrial wastes show excessively high levels of N accumulated during the composting process [21]. Composts with excessive amounts of N must be diluted with other materials to make them suitable for use as a growth medium by preventing any possible toxic effects [22].…”