Some of the applications, features and advantages of these industrial effluent treatment plants are: Used in anaerobic and aerobic treatment plants. Effective in biological sewerage treatment plants. Can be easily diffused in aeration system. These are belonged to Bio trickling filter class. Useful for the treatment of chemical oxidation of high COD effluent. Useful for removing of color for textile effluents. Wet air oxidation plants for sulfide waste. Used in carbon filters and pressure filters. Used in tertiary treatment plants. For emulsified and oily waste, these are used with dissolved air flotation process. Useful in reverse osmosis plants. Useful in nano filtration plants, ultra filtration plants.