Lipid production of Chlorella vulgaris cultured in artificial wastewater medium
Lipid production of Chlorella vulgaris cultured in artificial wastewater medium
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DOI：
10.1016/j.biortech.2010.06.016
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发表时间：
2011-01-01
影响因子：
11.4
通讯作者：
Zhang, Dawei
中科院分区：
文献类型：
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作者：
Feng, Yujie;Li, Chao;Zhang, Dawei
以普通小球藻为试材，研究了利用废水处理生产藻脂的工艺。采用人工废水培养C.在柱曝气光生物反应器（CAP）中分批和半连续培养，每天更换各种培养物（0.51-1.51/21反应器）。细胞密度从0.89 g/l（每日更换0.51次）降至0.28 g/l（每日更换1.51次）。然而，C.普通培养物获得最高的脂肪含量（42%，阶段平均值）和脂肪生产率（147 mg/L d（-1）），每日更换1.01。在此条件下，COD、NH 4+和TP的去除率分别为86%、97%和96%。能量效率的分析表明，净能量比（NER）的脂质生产与每日更换1.01（1.25）高于其他容量替代方案。成本分析表明，藻类生物质可以以每桶63.97美元的价格与石油竞争，并具有潜在的废水处理信贷。根据以上结果，本研究将为藻类油脂的经济生产提供一条新的途径。(C)2010爱思唯尔有限公司版权所有。
Chlorella vulgaris was used to study algal lipid production with wastewater treatment. Artificial wastewater was used to cultivate C. vulgaris in a column aeration photobioreactor (CAP) under batch and semi-continuous cultivation with various daily culture replacements (0.51-1.51 per 21 reactor). The cell density was decreased from 0.89 g/l with the daily replacement of 0.51 to 0.28 g/l with 1.51 replacement. However, C. vulgaris culture achieved the highest lipid content (42%, average value of the phase) and the lipid productivity (147 mg/l d(-1)) with daily replacement of 1.01. And then the nutrient removal efficiency were 86% (COD), 97% (NH4+) and 96% (TP), respectively. Analyses of energy efficiency showed that the net energy ratio (NER) for lipid production with daily replacement of 1.01(1.25) was higher than the other volume replacement protocols. And cost analyses showed that the algal biomass can be competitive with petroleum at US$ 63.97 per barrel with the potential credit for wastewater treatment. According to the above results, it is concluded that the present research will lead to an economical technology of algal lipid production. (C) 2010 Elsevier Ltd. All rights reserved.