A new wastewater treatment process that involves coagulation, ozonation, and microalgae cultivation has been developed. Here, two challenges are discussed. The first was minimizing phosphorus removal during coagulation in order to maximize algal production. The second was to optimize microalgae cultivation; algal species that grow rapidly and produce valuable products are ideal for selection. Haematococcus pluvialis, which produces the carotenoid astaxanthin, was used. Growth rate, nutrient removal ability, and astaxanthin production of H. pluvialis in coagulated wastewater were investigated. After coagulation with chitosan, the turbidity and suspended solids decreased by 89% ± 8% and 73% ± 16%, respectively. The nitrogen and phosphorus contents of the supernatant remained at 86% ± 6% and 67% ± 24%, respectively. These results indicate that coagulation with chitosan can remove turbidity and SS while preserving nutrients. H. pluvialis grew well in the supernatant of coagulated wastewater. The astaxanthin yield from coagulated wastewater in which microalgae were cultured was 3.26 mg/L, and total phosphorus and nitrogen contents decreased 99% ± 1% and 90% ± 8% (Days 31–35), respectively [corrected].
Water science and technology : a journal of the International Association on Water Pollution Research. 2015;72(7):1191-7. doi: 10.2166/wst.2015.330 Q32.52024
Development of a new wastewater treatment process for resource recovery of carotenoids
一种从废水中回收类胡萝卜素资源的新工艺开发研究 翻译改进
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DOI: 10.2166/wst.2015.330 PMID: 26398035
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Keywords：wastewater treatment; resource recovery; carotenoids
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Erratum: Water Science and Technology 72 (7): Development of a new wastewater treatment process for resource recovery of carotenoids, H. Sato, H. Nagare, T. N. C. Huynh and H. Komatsu, doi: 10.2166/wst.2015.330
水科学与技术72(7):废水处理新工艺的开发以回收虾青素类色素：H. Sato，H. Nagare，T. N. C. Huynh和H. Komatsu，doi: 10.2166/wst.2015.330
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