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首页> 外文期刊>Applied biochemistry and biotechnology, Part A. enzyme engineering and biotechnology >Effects of Nitrogen and Phosphorus on Biochemical Composition of Microalgae Polyculture Harvested from Phycoremediation of Piggery Wastewater Digestate
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Effects of Nitrogen and Phosphorus on Biochemical Composition of Microalgae Polyculture Harvested from Phycoremediation of Piggery Wastewater Digestate

机译：氮磷对养猪场污水消化系统微藻混养中微藻混养生化成分的影响

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摘要

The effects of nitrogen (N) and/or phosphorus (P) starvation on the biochemical composition of native microalgae Chlorella spp. polyculture obtained from the phycoremediation of swine wastewaters were investigated. Microalgae-specific growth rate of 1.2 day(-1) was achieved (30.3 mg L-1 day(-1)). PO4 (-2) and NH3 were completely removed from swine digestate effluent after 3 and 11 days, respectively. Microalgae harvested immediately after nutrient removal showed high protein (56-59 %) and carbohydrate (25-34 %) but low lipid (1.8-3 %) contents. Depletion of N or P alone stimulated carbohydrate production at the expenses of proteins. Significant lipid accumulation from 3 % +/- 0.5 to 16.3 % +/- 0.8 was reached only after 25 days following N and P starvation as demonstrated by Nile red-stained cells. Regarding to the effects of harvesting methods on cellular biochemical composition, circumstantial evidences indicate that coagulation-flocculation with tannin may lead to lower protein and lipid amounts but increased carbohydrate content (p < 0.01) as compared to centrifugation.
机译：氮（N）和/或磷（P）饥饿对天然微藻小球藻（Chlorella spp）生物化学成分的影响。研究了从猪废水的phycoremediation获得的混养。达到1.2天（-1）的微藻特异性生长速率（30.3 mg L-1天（-1））。 3天和11天后，分别从猪消化液中完全去除了PO4（-2）和NH3。去除营养后立即收获的微藻蛋白含量高（56-59％），碳水化合物含量高（25-34％），脂质含量低（1.8-3％）。单独消耗N或P会刺激碳水化合物的产生，但以蛋白质为代价。如尼罗河红染色的细胞所示，仅在N和P饥饿后25天后，脂质积累才达到3％+/- 0.5至16.3％+/- 0.8的显着水平。关于收获方法对细胞生化成分的影响，间接证据表明，与离心法相比，单宁凝结絮凝可能导致蛋白质和脂质含量降低，但碳水化合物含量增加（p <0.01）。

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