Production of advanced hydrochar without phytotoxic properties

Michael Renz, Martin Hitzl, Ana Mendez, Mikolaj Owsianiak

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    In the Climate KIC project CharM it has been confirmed that hydrochar possesses a climate change mitigation potential when applied to soils, depending on geographic location of the plant and hydrochar’s ability to increase crop productivity in the long term. However, during the initial period after application, pristine hydrochar exerts a plant growth retarding effect caused by toxicity of organic compounds present in the hydrochar. Herein we show that this effect can be eliminated by a simple finishing step based on thermal treatment. The latter can be incorporated easily into the actual production process, producing advanced hydrochar. An additional, mainly organic, stream is produced which can be valorized energetically, decreasing the dependency of the plant from external heat sources. Furthermore, this usage avoids undesired waste streams with a potential environmental concern. In conclusion, an economical concept is presented which paves the way to produce advanced hydrochar, which can be employed for soil amendment to increase crop productivity while mitigating climate change. This is a breakthrough for valorization of wet lignocellulosic resources.
    Original languageEnglish
    Publication date2018
    Publication statusPublished - 2018
    Event26th European Biomass Conference and Exhibition (EUBCE 2018) - Bella Center, Copenhagen, Denmark
    Duration: 14 May 201817 May 2018


    Conference26th European Biomass Conference and Exhibition (EUBCE 2018)
    LocationBella Center


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