Acclimatization and application of the granular sludge in an Upflow-Anaerobic-Sludge-Blanket (UASB) reactor

The acclimating techniques, the nutritional conditions and the environmental factors about the First Start-up granular sludge in an upflow anaerobic sludge blanket reactor have been studied. The secondary start-up process has been discussed, too. The results show that the anaerobic sludge can be granulated within 65 days in the laboratory by controlling the sludge loading, when it is seeded with conventional digested sludge and cultivated in synthetic waste water. The granulation process will be shortened for 17 days if 6.2% matured granular sludge is added to the seed. In addition, it only takes 10 days for the granular sludge cultivated in synthetic wastewater to be adapted to treat industrial wastewater while increasing its concentration.