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Comparative Analysis of Duckweed Cultivation with Sewage Water and SH Media for Production of Fuel Ethanol

机译：污水和SH培养基生产燃料乙醇浮萍的比较分析。

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Energy crises and environmental pollution have caused considerable concerns; duckweed is considered to be a promising new energy plant that may relieve such problems. Lemna aequinoctialis strain 6000, which has a fast growth rate and the ability to accumulate high levels of starch was grown in both Schenk & Hildebrandt medium (SH) and in sewage water (SW). The maximum growth rates reached 10.0 g DW m−2 day−1 and 4.3 g DW m−2 day−1, respectively, for the SH and SW cultures, while the starch content reached 39% (w/w) and 34% (w/w). The nitrogen and phosphorus removal rate reached 80% (SH) and 90% (SW) during cultivation, and heavy metal ions assimilation was observed. About 95% (w/w) of glucose was released from duckweed biomass hydrolysates, and then fermented by Angel yeast with ethanol yield of 0.19 g g−1 (SH) and 0.17 g g−1 (SW). The amylose/amylopectin ratios of the cultures changed as starch content increased, from 0.252 to 0.155 (SH) and from 0.252 to 0.174 (SW). Lemna aequinoctialis strain 6000 could be considered as valuable feedstock for bioethanol production and water resources purification.
机译：能源危机和环境污染引起了人们的极大关注。浮萍被认为是可以缓解此类问题的有希望的新能源工厂。在Schenk＆Hildebrandt培养基（SH）和污水（SW）中均生长了快速生长的Lemna aequinoctialis菌株6000，并具有积累高水平淀粉的能力。最大增长率达到10.0 g DW m -2 day -1 和4.3 g DW m -2 day -1 -1 （SH）和0.17 gg -1 < / sup>（SW）。随着淀粉含量的增加，培养物中直链淀粉/支链淀粉的比率发生变化，从0.252增至0.155（SH），从0.252增至0.174（SW）。 Lemna aequinoctialis菌株6000被认为是用于生物乙醇生产和水资源纯化的有价值的原料。

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