PAC treated sludge was collected from a municipal wastewater treatment plant in Chuncheon, Korea. The PAC treated sludge was first filtered with hardened ashless filter paper (Cat No. 1541-240, Whatman, USA) in order to remove any dissolved P in the liquid. After filtration the sludge was dried in a convection oven at 105 °C for 48 h.
Wet processing operations (including preparation, dyeing, and finishing) generate the majority of textile wastewater having very high COD, BOD, TDS and very deep colour as shown in the Table 1.Large numbers of chemical constituents such as alkali, acids, bleaching chemicals, enzymes, starch, dyes, resins, solvents, waxes, oils etc. are used in the various steps during textile processing and