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Effective Comprehensive Utilization Strategy for Upgrading Red Seaweed via Chemocatalysis and a Newly Isolated Pseudomonas rhodesiae in Tandem
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-02-21 , DOI: 10.1021/acssuschemeng.2c06608 Qing Liu 1 , Xiaohu Jin 1 , Hongxiao Li 1 , Jia Ouyang 1 , Zhaojuan Zheng 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-02-21 , DOI: 10.1021/acssuschemeng.2c06608 Qing Liu 1 , Xiaohu Jin 1 , Hongxiao Li 1 , Jia Ouyang 1 , Zhaojuan Zheng 1
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Red seaweed is a kind of important renewable biomass owing to its great advantages over terrestrial biomass, but present research mainly focused on the biorefinery of fermentable sugars from red seaweeds only. In this study, we proposed an effective comprehensive utilization strategy for upgrading red seaweed (Gelidium amansii) to d-galactose and 5-hydroxymethyl-2-furancarboxylic acid (HMFCA) via chemocatalysis and biocatalysis in tandem. With G. amansii as raw feedstock, high yields of d-galactose (85.5%) and 5-hydroxymethylfurfural (HMF) (50.9%) were first achieved by oxalic acid catalysis. HMF was separated and further selectively oxidized to HMFCA by whole cells of Pseudomonas rhodesiae NL2019 with a yield of 83.9%. Particularly, G. amansii hydrolysate was also used as the carbon source (d-galactose) for cell growth and as an inducer (HMF) to promote the catalytic capacity of P. rhodesiae cells. In this way, we established a cost-competitive, highly efficient, and environmentally friendly chemoenzymatic approach for the simultaneous valorization of all components of red seaweed.
中文翻译：
化学催化与新分离的罗得西亚假单胞菌串联升级红海藻的有效综合利用策略
红海藻与陆地生物质相比具有巨大的优势，是一种重要的可再生生物质，但目前的研究主要集中在红海藻可发酵糖的生物炼制上。在这项研究中，我们提出了一种有效的综合利用策略，通过化学催化和生物催化将红海藻 ( Gelidium amansii ) 升级为d-半乳糖和 5-羟甲基-2-呋喃甲酸 (HMFCA)。以G. amansii为原料，首先通过草酸催化实现了高产率的d-半乳糖 (85.5%) 和 5-羟甲基糠醛 (HMF) (50.9%)。HMF被罗得西亚假单胞菌全细胞分离并进一步选择性氧化成HMFCANL2019 收率为 83.9%。特别是，G. amansii水解产物还被用作细胞生长的碳源（d-半乳糖）和诱导剂（HMF）以促进P. rhodesiae细胞的催化能力。通过这种方式，我们建立了一种具有成本竞争力、高效且环保的化学酶促方法，用于同时对红海藻的所有成分进行增值。
更新日期：2023-02-21
中文翻译：
化学催化与新分离的罗得西亚假单胞菌串联升级红海藻的有效综合利用策略
红海藻与陆地生物质相比具有巨大的优势，是一种重要的可再生生物质，但目前的研究主要集中在红海藻可发酵糖的生物炼制上。在这项研究中，我们提出了一种有效的综合利用策略，通过化学催化和生物催化将红海藻 ( Gelidium amansii ) 升级为d-半乳糖和 5-羟甲基-2-呋喃甲酸 (HMFCA)。以G. amansii为原料，首先通过草酸催化实现了高产率的d-半乳糖 (85.5%) 和 5-羟甲基糠醛 (HMF) (50.9%)。HMF被罗得西亚假单胞菌全细胞分离并进一步选择性氧化成HMFCANL2019 收率为 83.9%。特别是，G. amansii水解产物还被用作细胞生长的碳源（d-半乳糖）和诱导剂（HMF）以促进P. rhodesiae细胞的催化能力。通过这种方式，我们建立了一种具有成本竞争力、高效且环保的化学酶促方法，用于同时对红海藻的所有成分进行增值。
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