Summary
A hydrocarbon-rich green microalga, Botryococcus braunii, was able to grow well in secondarily treated sewage (STS) from domestic waste-water in a batch system. The growth in STS from domestic waste-water was as good as in the common artificial medium of modified Chu 13 and its hydrocarbon contents were high enough at 53% and 40% compared with 58% in the case of the modified Chu 13 medium. B. braunii utilized nitrate from 7.67 or 4.48 mg/l to a level below detection of < 0.01 mg/l in STS. After this consumption of nitrate, nitrite was consumed, and ammonium was not. Phosphate, even at an extremely low concentration, was also consumed by B. braunii. These results show the possibility of using STS as a medium to grow B. braunii and for removal of nitrogen and phosphorus by algal consumption in STS.
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Correspondence to: S. Yokoyama
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Sawayama, S., Minowa, T., Dote, Y. et al. Growth of the hydrocarbon-rich microalga Botryococcus braunii in secondarily treated sewage. Appl Microbiol Biotechnol 38, 135–138 (1992). https://doi.org/10.1007/BF00169433
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DOI: https://doi.org/10.1007/BF00169433