Abstract
AbstractThe effect of chromium addition on the green alga Chlamydomonas sp. was investigated. Experiments were conducted by culturing pure stock cultures of the algae in a synthetically prepared culture medium simulating wastewater. Doses of chromium with different concentrations were added in shock and continuous forms. The effect of these doses on the growth of the algae was evaluated by carrying out algal cell counts. Possible removal of chromium by algal accumulation of the chromium was also evaluated by measuring residual chromium concentrations in the effluent. The results indicated that Chlamydomanas sp. could tolerate shock chromium doses of up to 0.2 mg. ℓ−1 and continous doses of up to 0.25 mg. ℓ−1 and can adapt to the presence of chromium in the medium. However, possible morphological changes could be induced in the cell. Furthermore, Chlamydomonas sp. was found to remove about 20% of the chromium found in the reactor.
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