Water toxicity in reservoirs after freshwater algae harvest
نویسندگان
چکیده
Blooms of microalgae and cyanobacteria increase every year, presenting great problems for the environment. Finding a way harvesting these could be useful water governance. Furthermore, method should not cause cell lysis thus avoiding discharging toxins into water. Three reservoirs were studied, two them with eutrophication (As Conchas A Baxe) another (Salas) no such problems. different methods studied; electroflocculation (EF) application time being varied; centrifugation, times speeds finally, natural sedimentation. The highest efficiency was obtained in culture from Baxe, which had higher initial absorbance value (1.664), using EF (90.64% an 2 min 30 s) centrifugation at 4000 rpm (92.25% for2 minutes, 92.73% 5 min). Electrofloculation can obtain up to 84% more biomass than sedimentation alone. Sample toxicity studied before after Microcystest found harvesting. It observed that same sample, yield greater was. For Baxe min, speed 2000 87.02%, figure 0.94 ?g/L obtained, while 92.25% 1.05 ?g/L. limit set by World Health Organization (WHO) is 1 ?g/L, this small difference seems key. With results, study concludes chlorophyll levels may interfere test used. Future tests or analyses developed so as avoid interference, alter toxin values. Electroflocculation promising since it does Microcystis aeruginosa, whereas give Finally, worth highlighting importance performing measurements check viable ecosystems.
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ژورنال
عنوان ژورنال: Journal of Cleaner Production
سال: 2021
ISSN: ['0959-6526', '1879-1786']
DOI: https://doi.org/10.1016/j.jclepro.2020.124560