Abstract:
World's present concerns are driven towards securing a sustainable water source in order to save
our plant and deliver a safer future for mankind. The use of synthetic dyes is increasing in many
areas. Synthetic dyes have been widely used in many industries such as textile, tannery, food,
pharmaceutical, pulp and paper, paint, plastics, the effluent discharge from these industries has
destructive effects on the environment and human health; reducing sunlight penetration and gas
solubility in aqueous ecosystems and mutagenic and carcinogenic effects in living organisms.
The physico-chemical methods are effective in dye removal, however problems such as the
overall cost, regeneration, secondary pollutants exists. As an alternative, biological treatments
are a relatively inexpensive way to remove dyes from wastewater. The use of biological methods
such as bioaccumulation and biosorption through bioflocculation technique is suitable for the
removal of such dyes from wastewaters. In this study, bacterial strain of Bacillus subtilis has
been used for the removal of crystal violet dye from an Egyptian textile effluent. More than 98 %
removal is achieved through application of bioflocculation technique. Complete characterization
for the textile effluent before and after treatment with bacterial strain has been done including
TSS, TDS and turbidity.
