Influence of Major Operational Parameters on Aerobic Granulation for the Treatment of Wastewater

Abstract

For cells in a culture to aggregate, a number of conditions have to be newlineSatisfied Hence aerobic granulation is affected by many operating newlineParameters The organic loading rate OLR helps to enrich different newlinebacterial species and to influence the size and settling ability of granules newlineHence OLR was argued as an influencing parameter by helping to enrich newlinedifferent bacterial species and to influence the size and settling ability of newlinegranules Hydrodynamic shear force, caused by aeration and measured as superficial upflow air velocity SUAV has a strong influence and hence it is used to control the granulation process Settling time ST and volume exchange ratio VER are also two key influencing factors which can be considered as selection pressures responsible for aerobic granulation based on the concept of minimal settling velocity Hence these four parameters OLR SUAV ST and VER were selected as major influencing parameters for the present study Influence of these four parameters on aerobic granulation was investigated in this work newline newline