Browsing by Subject "Activated sludge process"

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    Pelletization in the upflow anaerobic sludge bed (UASB) reactor
    (1989) Sam-Soon, Paul Alan Li Nai Sing; Marais, Gerrit van Rooyen; Loewenthal, Richard Eric
    This investigation was prompted by a study into the feasibility of treating an apple juicing waste water in an upflow anaerobic sludge bed (UASB) reactor system. Past experience with this system suggested that a pelletized sludge would be produced due to the nature of the waste water. This indeed was observed but the system exhibited an unusual feature, a high removal of nitrogen far in excess of that normally found in normal anaerobic processes. This observation stimulated a far reaching investigation into, the behaviour of the pelletized sludge bed, the causes giving rise to pelletization, a biochemical model explaining pellet formation, verification of the biochemical model, criteria for pellet formation, pH control in the pelletized sludge bed, and a kinetic model for the UASB process.