Aspects of photobioreactor and algadisk in CO2 sequestration and biomass production

In this study investigated the CO2 fixation efficiency and biomass productivity by green algae Chlorella vulgaris which is grown in various concentrations of dairy wastewater supplemented with CO2. The cultivation was carried out at 25 degrees C for various CO2-Air ratios such as (5%, 10%, and 15%). Artificial light-enhancing photosynthesis in bench-scale batch cultures were carried out in suspension (Photobioreactor) and attached (algadisk) for the period of 2 weeks. The maximum carbon fixation efficiency of 87.67 mg/l/day in suspended culture and 88.5 mg/l/d in algadisk was obtained at 15% CO2-Air ratio in dairy wastewater without dilution. Usage of external nutrient supply was supplemented by the nutrient-rich wastewater, which also results in nutrient removal from the dairy wastewater.

Automated summary

This study investigated the carbon dioxide fixation efficiency and biomass productivity of green algae Chlorella vulgaris grown in different concentrations of dairy wastewater supplemented with CO2. Cultivation was carried out at 25 degrees C with varying CO2-Air ratios of 5%, 10%, and 15%. The maximum carbon fixation efficiencies of 87.67 mg/l/day and 88.5 mg/l/d were achieved in suspended culture and algadisk, respectively, at a 15% CO2-Air ratio in undiluted dairy wastewater. The nutrient-rich wastewater not only served as a supplement for external nutrient supply but also facilitated nutrient removal from the dairy wastewater.