Efficient degradation of solid yeast biomass from ethanol industry by Fenton and UV-Fenton processes applying multivariate analysis

Abstract

Organic agro-industrial residues have been successfully used as biosorbents and promoting new uses from agricultural wastes benefits the economy. However, the allocation of a solid waste biosorbent after the sorption of contaminants has limited their effective application on a large scale as an alternative treatment of water and wastewaters. One solution could be degradation to convert the biosorbent material and adsorbed organic contaminants into environmental friendly compounds suitable for discharge. This study used an experimental design to evaluate the Fenton degradation of yeast biomass (YB) from the alcohol industry as a potential biosorbent. The efficiency of degradation was monitored according to the degraded mass (DM) and total organic carbon (TOC) remaining in the solution. The ANOVA showed an error of 9.7% for the effects and the media of interaction for the employed model for DM. Conducting the experiments with the best-predicted conditions (60 min, 25 g of YB, pH 3, 8,000 mg L-1 H2O2 and 40 mg L-1 Fe2+) with 30 W UV irradiation resulted in a YB reduction of 72 ± 2% with a TOC of 30 ± 2%. This suggests that an advanced oxidative process is an alternative for degradation of a biosorbent after sorption.

Experimental Planning Factorial: A brief Review

“…For this same species, (TOMALA, 2014) with the objective of evaluating the consumption of oxygen according to body weight at different temperatures, we used a completely randomized design with a factorial arrangement 5x3x3, and (40,60,90,140 and 250 g), and (21 26 to 31 ° C), respectively, with three replications. Associated with other statistical tool.…”

Interação das espécies Echinochloa crusgalli e Pistia stratiotes para fitorremediação de Levonorgestrel

“…Essa técnica possui alta eficiência e seletividade, baixo custo e simplicidade, além de permitir reciclagem e reutilização dos biossorventes [7]. Esse grupo engloba toda a biomassa ativa (com atividade metabólica) ou inativa (sem atividade metabólica) de qualquer matéria de origem vegetal ou animal, tais como resíduos agroindustriais, bactérias, algas, fungos, leveduras e vegetais [17].…”