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将废弃咖啡渣用作替代燃料及可能的土壤改良剂。

Use of Spent Coffee Ground as an Alternative Fuel and Possible Soil Amendment.

作者信息

Jeníček Lukáš, Tunklová Barbora, Malaťák Jan, Neškudla Michal, Velebil Jan

机构信息

Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic.

Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic.

出版信息

Materials (Basel). 2022 Sep 27;15(19):6722. doi: 10.3390/ma15196722.

DOI:10.3390/ma15196722
PMID:36234063
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9570971/
Abstract

Spent coffee ground is a massively produced coffee industry waste product whose reusage is beneficial. Proximate and ultimate and stochiometric analysis of torrefied spent coffee ground were performed and results were analyzed and compared with other research and materials. Spent coffee ground is a material with high content of carbon (above 50%) and therefore high calorific value (above 20 MJ·kg). Torrefaction improves the properties of the material, raising its calorific value up to 32 MJ·kg. Next, the phytotoxicity of the aqueous extract was tested using the cress test. The non-torrefied sample and the sample treated at 250 °C were the most toxic. The sample treated at 250 °C adversely affected the germination of the cress seeds due to residual caffeine, tannins and sulfur release. The sample treated at 350 °C performed best of all the tested samples. The sample treated at 350 °C can be applied to the soil as the germination index was higher than 50% and can be used as an alternative fuel with net calorific value comparable to fossil fuels.

摘要

咖啡渣是咖啡产业大量产生的废弃物，对其进行再利用具有益处。对烘焙后的咖啡渣进行了近似分析、元素分析和化学计量分析，并对结果进行了分析，还与其他研究及材料进行了比较。咖啡渣是一种碳含量很高（超过50%）的材料，因此具有很高的热值（超过20兆焦·千克）。烘焙提高了该材料的性能，使其热值提高到32兆焦·千克。接下来，使用水芹试验测试了水提取物的植物毒性。未烘焙的样品和在250℃处理的样品毒性最大。在250℃处理的样品因残留的咖啡因、单宁和硫的释放而对水芹种子的发芽产生了不利影响。在所有测试样品中，在350℃处理的样品表现最佳。在350℃处理的样品可用于土壤，因为其发芽指数高于50%，并且可以用作净热值与化石燃料相当的替代燃料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/dca308ae475f/materials-15-06722-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/fb1d7e2d8f6c/materials-15-06722-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/cb5ee6013fef/materials-15-06722-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/b60c3760e60f/materials-15-06722-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/8cc2dfc1d8a4/materials-15-06722-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/43924ba743cf/materials-15-06722-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/6f471f5c8e00/materials-15-06722-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/26f21a632cb9/materials-15-06722-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/dca308ae475f/materials-15-06722-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/fb1d7e2d8f6c/materials-15-06722-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/cb5ee6013fef/materials-15-06722-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/b60c3760e60f/materials-15-06722-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/8cc2dfc1d8a4/materials-15-06722-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/43924ba743cf/materials-15-06722-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/6f471f5c8e00/materials-15-06722-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/26f21a632cb9/materials-15-06722-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bcb1/9570971/dca308ae475f/materials-15-06722-g008.jpg

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