Abstract
One strain of photosynthetic bacteria (PSB) was isolated from substrate sludge of fresh-water fishpond. Influence of the use level of PSB culture solution, illumination condition, temperature, salinity, the use level of copper sulfate and dipterex on the purification efficiency was investigated. The results showed that the optimum use level of PSB culture solution was 10 mg/L, and the purification efficiency at illumination was higher than that at black, and if the temperature was lower than 15 °C., or the use level of sodium chloride, copper sulfate and dipterex were higher than 10 000 mg/L, 0.4 mg/L and 2.0 mg/L, respectively, the purification efficiency dropped distinctly.
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