Demonstration of parallel algal processing: production of renewable diesel blendstock and a high-value chemical intermediate,Green Chemistry

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Demonstration of parallel algal processing: production of renewable diesel blendstock and a high-value chemical intermediate
Green Chemistry ( IF 9.3 ) Pub Date : 2017-12-19 00:00:00 , DOI: 10.1039/c7gc02295f
Eric P. Knoshaug _{1,

2,

3,

4} , Ali Mohagheghi _{1,

2,

3,

4} , Nick J. Nagle _{1,

2,

3,

4} , Jonathan J. Stickel _{1,

2,

3,

4} , Tao Dong _{1,

2,

3,

4} , Eric M. Karp _{1,

2,

3,

4} , Jacob S. Kruger _{1,

2,

3,

4} , David G. Brandner _{1,

2,

3,

4} , Lorenz P. Manker _{1,

2,

3,

4} , Nick A. Rorrer _{1,

2,

3,

4} , Deb A. Hyman _{1,

2,

3,

4} , Earl D. Christensen _{2,

3,

4,

5} , Philip T. Pienkos _{1,

2,

3,

4}

Affiliation

Co-production of high-value chemicals such as succinic acid from algal sugars is a promising route to enabling conversion of algal lipids to a renewable diesel blendstock. Biomass from the green alga Scenedesmus acutus was acid pretreated and the resulting slurry separated into its solid and liquor components using charged polyamide induced flocculation and vacuum filtration. Over the course of a subsequent 756 hours continuous fermentation of the algal liquor with Actinobacillus succinogenes 130Z, we achieved maximum productivity, process conversion yield, and titer of 1.1 g L⁻¹ h⁻¹, 0.7 g g⁻¹ total sugars, and 30.5 g L⁻¹ respectively. Succinic acid was recovered from fermentation media with a yield of 60% at 98.4% purity while lipids were recovered from the flocculated cake at 83% yield with subsequent conversion through deoxygenation and hydroisomerization to a renewable diesel blendstock. This work is a first-of-its-kind demonstration of a novel integrated conversion process for algal biomass to produce fuel and chemical products of sufficient quality to be blend-ready feedstocks for further processing.

中文翻译：

平行海藻加工的演示：可再生柴油混合原料和高价值化学中间体的生产

由藻糖共同生产高价值化学品（如琥珀酸）是将藻类脂质转化为可再生柴油调和原料的有前途的途径。酸处理绿藻场景生物的生物质，并使用带电聚酰胺诱导的絮凝和真空过滤将生成的浆液分离成固体和液体成分。在随后的756小时内，用琥珀酸放线杆菌对藻类液进行连续发酵，我们获得了最高的生产率，工艺转化率以及效价为1.1 g L ^-1 h ^-1，总糖0.7 gg ^-1和30.5 g L ^-1分别。从发酵培养基中回收丁二酸，纯度为98.4％，收率为60％，而脂质从絮凝饼中以83％的收率回收，随后通过脱氧和加氢异构化转化为可再生柴油调和原料。这项工作是藻类生物质的新型综合转化工艺的同类产品的首例演示，该工艺可生产出足够质量的燃料和化学产品，可作为混合原料用于进一步加工。

更新日期：2018-01-22

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