Abstract
A denitrifying photosynthetic bacterium (PSB), Rhodobacter sphaeroides S was immobilized on a porous ceramic plate (10 × 10 × 0.5 cm) using a small amount of agar. In the bioreactor (3.5 l liquid) using this plate, repeated batch treatments of sewage wastewater (acetic acid as a carbon source) were carried out under aerobic conditions (DO 5 mg/l) for two weeks. The simultaneous and effective removal of chemical oxygen demand (COD), ammonium, and nitrate was observed. In continuous treatment at a relatively high dilution rate of 0.20 h−1 (retention time, five hours), the same simultaneous treatments were observed for about one month.
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Nagadomi, H., Takahasi, T., Sasaki, K. et al. Simultaneous removal of chemical oxygen demand and nitrate in aerobic treatment of sewage wastewater using an immobilized photosynthetic bacterium of porous ceramic plates. World Journal of Microbiology and Biotechnology 16, 57–62 (2000). https://doi.org/10.1023/A:1008947416198
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DOI: https://doi.org/10.1023/A:1008947416198