lubilisation was found to be in the range of 45-50%. The alkali increases the pH of the digested mixed liquor and was in the range of 9.2-9.8. This high pH range was favorable for phosphorous removal using calcium salt. The phosphorous removal in the supernatant was carried out using lime at a mole ratio of 2.1:1. Р4. ConclusionsР Stable operation of MBR process was possible without significant accumulation of biomass when a part of the biological solids were disintegrated with alkali at pH 11 and temperature 75℃.Thermo chemical sludge digestion favors the recovery of phosphorous in the supernatant using calcium salts. The system can run for a long period of time with any further detoriation in TP removal efficiency. Further studies focusing on fate of disintegrated sludge are in progress.
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