Strategies for enhanced biomass and lipid production by Chlorella pyrenoidosa culture in starch processing wastewater
Strategies for enhanced biomass and lipid production by Chlorella pyrenoidosa culture in starch processing wastewater
复制标题
淀粉加工废水中蛋白核小球藻培养物提高生物量和脂质产量的策略
DOI：
10.1016/j.jclepro.2019.117671
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发表时间：
2019-11-01
影响因子：
11.1
通讯作者：
Yang, Li-Bin
中科院分区：
文献类型：
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作者：
Tan, Xiao-Bo;Zhao, Xian-Chao;Yang, Li-Bin
淀粉废水含有多种营养物质，是一种潜在的微藻培养基质。在这项研究中，研究了包括废水处理和混合在内的策略来提高生物量和脂肪产量。微藻蛋白核小球藻在厌氧消化和二级处理淀粉废水中生长正常。然而，由于生物量或脂肪含量较低，它们的脂肪产量很低(6.7-22.9 mg L-1.d(-1))。因此，对淀粉废水不同处理阶段的混合策略进行了试验，以促进藻类的生长和脂肪的积累。与空白培养相比，在厌氧二级处理淀粉废水中添加50%的酸化淀粉废水，菌体浓度分别提高78.1%(L 3.3g~(-1))和105.2%(1.2g L~(-1))，脂肪含量提高18.7~28.0%。此外，混合培养提高了饱和脂肪酸(通常是棕榈酸和硬脂酸)的程度。这为利用淀粉废水提高藻类脂肪产量和质量提供了一条很有前途的途径。(C)2019爱思唯尔有限公司。保留所有权利。
Starch wastewater contains various nutrients, as a potential medium for cultivating microalgae. In this study, strategies including wastewater treatments and mixing were investigated to enhance biomass and lipid production. The microalgae Chlorella pyrenoidosa performed normal growth in anaerobic digested and secondary treated starch wastewater. However, their lipid yields were very low (6.7 -22.9 mg L-1.d(-1)) due to the low biomass production or lipid content. Therefore, the strategy for mixing different treatment stages of starch wastewater was tested to improve algal growth and lipid accumulation. In comparison to blank culture, adding 50% acidified starch wastewater into anaerobic and secondary treated starch wastewater significantly increased biomass concentration by 78.1% (to 3.3 g L (-1)) and 105.2% (to 1.2 g L-1), while achieving higher lipid content to 18.7-28.0%. Moreover, the mixed culture improved the degree of saturated fatty acids (typically in palmitic and stearic acid). This provides a promising approach to improve algal lipid yield and quality using starch wastewater. (C) 2019 Elsevier Ltd. All rights reserved.