Habibi Adnan, Nematzadeh Ghorban Ali, Shariati Farshid Pajoum, Amrei Hossein Delavari, Teymouri Abolghasem
1Department of Chemical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
2Genetics and Agricultural Biotechnology Institute of Tabarestan (GABIT), Sari Agricultural Sciences and Natural Resources University, Sari, Iran.
3 Biotech. 2019 Apr;9(4):150. doi: 10.1007/s13205-019-1679-7. Epub 2019 Mar 25.
In this study, microalgae growth in the synthetic wastewater and their ability to remove nutrients under different light levels was investigated. For this purpose, a comparative study was conducted on freshwater microalgae sp. to evaluate their performance to remove nitrate and phosphate from both slaughterhouse and dairy synthetic treated wastewaters, under different light/dark cycles (12/12, 16/8 and 24/0 h), in Erlenmeyer flasks. The best light/dark cycles in Erlenmeyer flasks for nitrate and phosphate removal and growth were obtained at 24/0 h. Moreover, nitrate and phosphate removal under light conditions at 24/0 h light/dark cycles were tested in a designed open raceway pond. The maximum nitrate removal in slaughterhouse and dairy synthetic wastewater was 78% and 99.7%, and the phosphate removal was 31% and 68%, respectively. Furthermore, the highest biomass productivity in dairy and slaughterhouse synthetic wastewater during 9 days was 0.65 g L and 1.5 g L, respectively. Thus, sp. could be potential candidates by showing their intrinsic merit, for the reduction of nitrate and phosphate residue levels from dairy and slaughterhouse synthetic wastewaters in open raceway ponds.
在本研究中，研究了微藻在合成废水中的生长情况及其在不同光照水平下去除营养物质的能力。为此，在锥形瓶中对淡水微藻进行了一项比较研究，以评估它们在不同光暗周期（12/12、16/8和24/0小时）下去除屠宰场和乳制品合成处理废水中硝酸盐和磷酸盐的性能。锥形瓶中去除硝酸盐和磷酸盐以及生长的最佳光暗周期为24/0小时。此外，在设计的开放式跑道池塘中测试了24/0小时光暗周期光照条件下的硝酸盐和磷酸盐去除情况。屠宰场和乳制品合成废水中硝酸盐的最大去除率分别为78%和99.7%，磷酸盐的去除率分别为31%和68%。此外，在9天内，乳制品和屠宰场合成废水中的最高生物量生产率分别为0.65克/升和1.5克/升。因此，通过展现其内在优点，该微藻可能是在开放式跑道池塘中降低乳制品和屠宰场合成废水中硝酸盐和磷酸盐残留水平的潜在候选者。
