Production of immobilized cyanobacteria oscillatoria for increasing of oxygen contents in synthetic wastewater

Abstract

This research aimed to investigate the ability of cyanobacteria Oscillatoria sp. immobilized cells to increase dissolved oxygen (DO) contents in synthetic wastewater. The optimal immobilized cyanobacteria Oscillatoria cell was studied using various concentration of fresh cell at 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0 %(w/v) in 2.0%(w/v) sodium alginate solution ((C₆H₈O₆)_n) and 1.0 %(w/v) calcium chloride solution (CaCl₂). The immobilized cyanobacteria cell was incubated in synthetic wastewater under white light and room temperature for 120 minutes. The DO contents were measured using DO meter. The optimal formula of the immobilized cell was 2.0%(w/v) Oscillatoria sp. cell in the optimal formula of immobilized cell solution showed the highest DO contents (7.25 mg/L). The Oscillatoria sp. immobilized cells have a higher potential of increasing DO contents than free cells for 1.31 folds. This finding suggested that the immobilized cyanobacteria could be used for wastewater treatment.