In recent decades, the demand for palm oil has constantly increased and with it the cultivation of oil palms. After a period of 25 years, the oil yield of the palm trees decreases and they are felled. The trees are cut into pieces and remain on the plantations. However, due to their high moisture and sugar content, fungi and molds cause problems for replanting. The use of the wood for the timber industry is difficult due to its structural characteristics. Biotechnological processes use microorganisms to produce relevant industrial products. The basis for each process is a culture medium that contains all necessary nutrients, especially carbohydrates. The culture medium makes up a high percentage of the costs, so alternative, cheaper substrates are preferred. In this review, we show and compare different analyses of the sap mechanically pressed from the oil palm trunk regarding its sugar and nutrient content. The total sugar concentration in the palm sap varies between 16.97–140 g L⁻¹ and it is mainly composed of glucose, fructose, and sucrose. The comparison with common nutrient media and the results of fermentation processes already carried out on a laboratory scale show that palm sap offers great potential as a fermentation medium for biotechnological conversion into industrially relevant products. © 2021 The Authors Biofuels, Bioproducts and Biorefining published by Society of Chemical Industry and John Wiley & Sons, Ltd

中文翻译：

---

来自油棕（Elaeis guineensis）树干的压榨汁液：生物技术行业的革命性增长培养基吗？

在最近的几十年中，对棕榈油的需求不断增长，随之而来的是种植油棕。25年后，棕榈树的石油产量下降而被砍伐。树木被切成碎片，留在种植园中。但是，由于真菌和霉菌的水分和糖分含量高，因此造成了重新种植的问题。由于其结构特征，将木材用于木材工业是困难的。生物技术过程利用微生物来生产相关的工业产品。每个过程的基础是一种包含所有必需营养素，尤其是碳水化合物的培养基。培养基在成本中所占的比例很高，因此，最好选择其他更便宜的底物。在这篇评论中，我们显示并比较了从油棕树干机械榨取的汁液中糖和营养成分的不同分析。棕榈汁中的总糖浓度在16.97–140 g L之间变化^-1，主要由葡萄糖，果糖和蔗糖组成。与常见营养培养基的比较以及已经在实验室规模上进行的发酵过程的结果表明，棕榈汁作为将生物技术转化为工业相关产品的发酵培养基具有巨大潜力。©2021由化学工业协会和John Wiley＆Sons，Ltd出版的《生物燃料，生物产品和生物精炼》的作者