Design of reaction conditions for the enhancement of microbial degradation of dyes in sequential cycles

The present study evaluated the potential of white-rot fungal strain Coriolus versicolor to decolorize five structurally di erent dyes in sequential batch reactors under optimized conditions. The experiments were run continuously for seven cycles of 8 d each. High decolorizing activity was observed even during the repeated reuse of the fungus, especially when the old medium was replaced with fresh medium after every cycle. Biodegradation was the dominating factor as the fungus was able to produce the enzyme laccase mainly, to mineralize synthetic dyes. The nutrients and composition of the medium played important roles in sustaining the decolorisation potential of the fungus. Corncob was found be an easy and cheap substitute for carbon source for the fungus. Glucose consumption by the fungus was in accordance to its decolorisation activity and chemical oxygen demand (COD) reduction.     

柱撑酸化膨润土对染料废水的处理实验研究

目前国内外对柱撑酸化膨润土的实验研究少有报道。将钙基膨润土酸性活化,用其处理染料废水其一次性COD去除率可达62%,色度去除率可达83%。若再对其进行无机柱撑,COD的去除率可达81%以上,色度去除率可达98%以上。其处理后的染料废水达到国家工业废水排放标准。