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

Revista Ambiente & Água

Elma Neide Vasconcelos Martins Carrilho¹  Geórgia Labuto²  Heron Dominguez Torres da Silva²  Lilia Ribeiro da Silva²  Christiane de Arruda Rodrigues³  Norberto Sanches Goncalves⁴ 

[1] Universidade Federal de São Carlos (UFSCar), Araras, SP, Brasil Departamento de Ciências da Natureza, Matemática e Educação. ;Universidade Federal de São Paulo (UNIFESP), Diadema, SP, Brasil Grupo de Análises Químicas Aplicadas;Universidade Federal de São Paulo (UNIFESP), Diadema, SP, Brasil Laboratório de Engenharia e Controle Ambiental. ;Universidade Federal de São Paulo (UNIFESP), Diadema, SP, Brasil Laboratório de Química de Calixarenos, Espectroscopia Molecular e Catálise. ;

关键词: biosorbent degradation;    chemometric approach;    oxidative processes;    photo Fenton process;    treatment of solid residues;   

DOI  :  10.4136/ambi-agua.2124

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown