Use of microorganisms in treatment of color can be used for both free and immobilized cells, the cells. But the use of free cells have limitations on thrombosis, durability and cell loss from the system. While the immobilized cells is effective in treatment of higher color The leakage or obstruction of the cell. The biomass volume concentration. Can separate cells immobilized from wastewater treatment system easily. And the resistance to extreme conditions, such as temperature, pH, and pollutants that can be recycled repeatedly (Ravishankar 2000 and,, Engler 2009), immobilized cells by cell retention will help create the conditions with low oxygen. Due to the resistance to the cabins available. It improves the efficiency of color (Steffan 2005), the techniques used to freeze the cells is a way Entrapment available to cells of all kinds. Limitations of number of cells per beads and cells leak. Another way is Encapsulation with problems about beads are weak. Has developed a technique to freeze hybrid cells (Hybrid Immobilization) the beads with high efficiency. There is no limit to number of cells per beads. And protects the cells leaked well (Song 2005), so treatment process color with biological method by using this hybrid technique is used. To separate the cells are frozen out of the wastewater treatment system easily. It is an effective way to reduce water pollution problems, and is environmentally friendly. And can be applied in treatment of wastewater from color dyeing factories.
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