European Biotechnology Congress 2022-Poster Presentation Abstracts

abstract

English

World production of wheat bran reaches 100 million tons per year and spent coffee grounds about 6 million tons per year. This material often remains unused and is landfilled. Various strategies can be adopted to minimize landfilling of food waste, because food waste has interesting properties. The long-term application of food waste organic fertilizer was shown to improve soil quality. However, it was previously reported that the addition of 2,5 % of spent coffee grounds to the soil has a significant negative effect on plants. Therefore, our study is focused on the detoxification of spent coffee grounds and its subsequent use as a fertilizer in combination with native wheat bran and thermally treated wheat bran. In the experiments, the content of phenolic substances and caffeine was reduced by oxidation and extraction procedure. Results obtained during the duration of the experiments have shown that despite the reduction of phenolic substances and caffeine in coffee spent grounds after detoxification procedure, the soil containing treated spent coffee grounds harmed plant growth even though the partial physicochemical parameters of the soil were improved by the addition of organic fertilizer.

Coffee grounds, food waste, detoxification, growing media, biofertilizer

JUGLOVÁ, Z.; SMRČKOVÁ, K.; DIVIŠ, P.

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