Waste biomass composed of cork-rich and phloem-rich granules obtained from the fractioning of Quercus cerris L. bark were characterized for bulk density, chemical composition, bio-active components, ash composition, and higher heating value.

Bulk density of the fractions relate to their cork content and deceases with smaller particle size due to a cork enrichment in the finer particles. The bulk density may therefore be used as an indicator of suberin content of waste cork and phloem fractions. Waste cork fractions are rich sources of lipophilic and polar extracts while waste phloem fractions contain high amount of polar extracts. The polar extracts of both biomass fractions showed very high antioxidant capacities with IC₅₀ values between 2.5 and 7.3 μg extract mL^-1 for cork fractions and 5.8 and 11.7 μg extract mL^-1 for phloem fractions.

Higher heating values in waste cork fractions increase with decreasing particle size and ranged between 20 and 22 MJ kg^-1. A biorefinery scheme was developed for the valorization of the waste cork and phloem fractions based on their physical, chemical, bioactive, and higher heating values.

通过对栎皮的分馏获得的由富含软木塞和韧皮部的颗粒组成的废弃生物质的容重，化学组成，生物活性成分，灰分组成和较高的热值进行了表征。

馏分的堆积密度与它们的软木塞含量有关，并且由于软木塞在较细的颗粒中而具有较小的粒径而降低。因此，堆积密度可以用作废软木和韧皮部馏分中木脂素含量的指标。软木废料馏分富含亲脂和极性提取物，而韧皮部废料则含有大量的极性提取物。两个生物质级分的极性提取物显示非常高的抗氧化能力与IC _50个2.5和7.3微克提取毫升之间的值^-1和软木馏分5.8和11.7微克提取毫升^-1为韧皮部馏分。

废软木馏分中较高的热值随着粒径的减小而增加，范围在20至22 MJ kg ^-1之间。根据废软木和韧皮部馏分的物理，化学，生物活性和较高的发热量，开发了一种生物精炼计划，以对其进行增值。