Estudo da viabilidade de produção de três espécies de cogumelos do gênero Pleurotus em resíduo úmido de cervejaria

Abstract

The industrial production process of beer is a branch which generates many by-products, both filtration and filling steps as in the treatment of water and wastewater. The expeller Malte, called Brewery Moist residue (or RUC) is one of the waste generated in greater quantity and does not have a destination in which its potential is fully tapped, since it is only used for animal feed and food in small quantities. Thus, the aim of this study was to characterize this by-product with moisture analysis, total sugars, ash, total nitrogen and fiber, in addition to verifying the feasibility of the same for the cultivation of three different species of Pleurotus genus of mushrooms compared to production in corn stover. Since mushrooms can be produced in a wide range of substrates, using a culture medium the RUC base would bring many benefits to both the environment and for farmers and brewers that would eventually not need to worry about the final destination. The experiments were conducted as follows: culture media only with RUC shape which was obtained after the production process and corn straw dipped in water for 12 hours; Initially, the substrates were placed in polypropylene bags, then autoclaved and inoculated with the three species of mushrooms used in the studies. The results, however, showed that the moisture content of the RUC is above the ideal considered, in addition to the C / N is below what should be provided to fungi; Taking this into consideration, only the RUC was not considered a good substrate for the species studied, with limitations to the development of fungi, since there was a sufficient mycelial growth, hindered thereby fruiting stage. Furthermore, this by-product is very susceptible to contamination even after autoclaving, causing the employment of the conditions studied is infeasible.