Mixed Wastewater Coupled with CO2 for Microalgae Culturing and Nutrient Removal.
Mixed Wastewater Coupled with CO2 for Microalgae Culturing and Nutrient Removal.
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DOI：
10.1371/journal.pone.0139117
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Miao X
中科院分区：
文献类型：
--
作者：
Yao L;Shi J;Miao X
研究了不同 CO2 浓度的混合废水中小球藻 (Chlorella sorokiniana) 和锁链藻 (Desmodesmus communis) 的生物量、营养物去除能力、脂质生产率和形态变化。在最佳条件下，即猪废水与含有5% CO2的二级处理城市废水比例为1:3时，C. sorokiniana和D. communis的最大生物量浓度分别为1.22 g L-1和0.84 g L-1。氨、磷几乎全部被去除，总氮去除率，山竹、山竹分别为88.05%和83.18%。培养10天后，C. sorokiniana和D. communis的脂质含量分别达到17.04%和20.37%。 CO2 通气增加了两种微藻的细胞内颗粒数量，并使 D. commis 趋于孤独。研究表明，通入CO2可提高微藻对高浓度NH4-N的耐受性，营养过剩胁迫可诱导微藻脂质积累。
Biomass, nutrient removal capacity, lipid productivity and morphological changes of Chlorella sorokiniana and Desmodesmus communis were investigated in mixed wastewaters with different CO2 concentrations. Under optimal condition, which was 1:3 ratio of swine wastewater to second treated municipal wastewater with 5% CO2, the maximum biomass concentrations were 1.22 g L-1 and 0.84 g L-1 for C. sorokiniana and D. communis, respectively. Almost all of the ammonia and phosphorus were removed, the removal rates of total nitrogen were 88.05% for C. sorokiniana and 83.18% for D. communis. Lipid content reached 17.04% for C. sorokiniana and 20.37% for D. communis after 10 days culture. CO2 aeration increased intracellular particle numbers of both microalgae and made D. communis tend to be solitary. The research suggested the aeration of CO2 improve the tolerance of microalgae to high concentration of NH4-N, and nutrient excess stress could induce lipid accumulation of microalgae.