Simultaneous chromium removal and lipid accumulation by microalgae under acidic and low temperature conditions for promising biodiesel production
Simultaneous chromium removal and lipid accumulation by microalgae under acidic and low temperature conditions for promising biodiesel production
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微藻在酸性和低温条件下同时去除铬和积累脂质，有望生产生物柴油
DOI：
10.1016/j.biortech.2022.128515
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发表时间：
2023
影响因子：
11.4
通讯作者：
Hong-Yu Ren
中科院分区：
文献类型：
--
作者：
Xueting Song;Bing-Feng Liu;Fanying Kong;Qingqing Song;Nan-Qi Ren;Hong-Yu Ren
微藻作为重金属吸附剂和生物柴油生产原料已成为近年来研究的热点。本文研究了在pH3.5和15 °C条件下，克氏副小球藻（Parachlorella kessleriR-3）的生长、产脂和去除Cr ~（6+）的情况。结果表明，低浓度的Cr 6+（0.5 ~ 2 mg/L）对藻类生长有促进作用，而高于5 mg/L的Cr 6+对P. kessleriR-3。当Cr 6+浓度为2 mg/L时，生物量（2.40 g/L）和油脂生产率（131.79 mg/L d-1）最高，油脂含量（61.03%）在5 mg/L时最高。当Cr ~（6+）浓度为0.5mg/L时，Cr ~（6+）的去除率最高，达91%。脂肪酸组成分析表明，菌株R-3具有较高的C16-18含量，为74.88- 89.21%。这项研究为寒冷地区HM的治疗和脂质产生提供了新的见解。
Microalgae have become the hotspot of recent researches as heavy metals (HMs) adsorbent and biodiesel production feedstock. In this study, the cell growth, lipid production and Cr6+removal ofParachlorella kessleriR-3 at pH 3.5 and 15 °C were investigated. It was found that low concentration of Cr6+(0.5 to 2 mg/L) promoted the algal growth, whereas Cr6+higher than 5 mg/L inhibited the growth ofP. kessleriR-3. Biomass concentration (2.40 g/L) and lipid productivity (131.79 mg/L d−1) reached the highest at 2 mg/L Cr6+, and lipid content (61.03 %) reached the highest at 5 mg/L Cr6+. The maximum Cr6+removal efficiency of 91 % was obtained at 0.5 mg/L Cr6+treatment. Furthermore, fatty acid composition analysis showed that strain R-3 had a high C16-18 content of 74.88–89.21 %. This study provides new insight into the treatment of HMs and lipid production in cold regions.