Este estudo avaliou o efeito da glicose na remoção de metil paration por Aspergillus niger AN400. O estudo foi realizado em duas etapas: testes de toxicidade em placas e ensaios em batelada, sob agitação de 200 rpm. As concentrações de metil paration no ensaio de toxicidade variaram de 0,075 a 60 mg/L. A segunda etapa consistiu na avaliação dos reatores divididos em lotes: seis reatores controle, com solução de metil paration; seis reatores com fungos e paration metílico e seis reatores com fungos, paration metílico e glicose. Os tempos de reação estudados variaram de 1 a 27 dias. Concentrações de paration metílico de até 60 mg/L não foram tóxicas para Aspergillus niger AN400. O modelo de primeira ordem representou bem a cinética de degradação do metil paration. A constante cinética foi de 0,063 ± 0,005 h¹ para reatores sem adição de glicose, enquanto o valor de 0,162 ± 0,014 h¹ foi obtido quando a glicose foi adicionada.

This study evaluated the glucose effect on the removal of methyl parathion by Aspergillus niger AN400. The study was conducted in two stages: toxicity tests on plates and assays in flasks, under an agitation of 200 rpm. The methyl parathion concentrations in the toxicity test ranged from 0.075 to 60 mg/L. The second stage consisted on evaluating reactors: six control reactors with methyl parathion solution; six reactors with fungi and methyl parathion, and six reactors containing fungi, methyl parathion, and glucose. The reaction times studied ranged from 1 to 27 days. Methyl parathion concentrations of up to 60 mg/L were not toxic for Aspergillus niger AN400. The first-order kinetic model served as a good representation of the methyl parathion conversion rate. The first-order kinetic constant was 0.063 ± 0.005 h-1 for flasks without addition of glucose, while a value of 0.162 ± 0.014 h-1 was obtained when glucose was added.

A sequential batch reactor (4 L) inoculated with Aspergillus niger was operated in order to remove congo red dye (10 mg L-1). The feeding of the reactor was done to each 7 days. The glucose was added in the concentration of 1 g.L-1 (Stage I) and 0.5 g L-1 (Stage II). The Stage III occurred without glucose addition. The Stage I was great to process, because the system reached the greater dye removal (95%) as well as the kinetic parameters ware the best - K M (0.7 g L-1) and k1 (0.025 h-1).