Removal of industrial dyes by Microbes

Colored dye wastewater presents a challenging task for biological treatment.

At present, dyes are generally removed by the use of activated charcoal or ultracentrifugation.

Dramatic dye color removal can be achieved by microbial means. For example, a 99% reduction in red dye was achieved by biological treatment in 48 hours.

A wide range of microorganisms is able to remove dyes from water including the yeast and bacteria.

Use of bacteria to degrade Malachite Green

It was found that the best bacterium for degradation of the Malachite Green dye is Ochrobacterium anthropi.

This bacterium can be obtained from the sludge of the waste water treatment plant.

Before Degradation

In Process

After Degradation

Use white rot fungi to decolourise dyes

White rot fungus can decolourize a number of dyes, particularly crystal violet dye which is often used to dye jeans.

This rot fungus requires a growth substrate and a fixed surface for efficient colour reduction.

 

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