Maximizing the value of liquid products and minimizing carbon loss in hydrothermal processing of biomass:an evolution from carbonization to humification  

作　　者：Nader Marzban Judy A.Libra Vera Susanne Rotter Christiane Herrmann Kyoung S.Ro Svitlana Filonenko Thomas Hoffmann Markus Antonietti 

机构地区：[1]Leibniz Institute for Agricultural Engineering and Bioeconomy E.V.(ATB),Max-Eyth-Allee 100,14469 Potsdam,Germany. [2]Department of Environmental Technology,Chair of Circular Economy and Recycling Technology,Technische Universität Berlin,10623 Berlin,Germany. [3]Coastal Plains Soil,Water&Plant Research Center,USDA-ARS,Florence,SC 29501,USA. [4]Department of Colloid Chemistry,Max-Planck Institute of Colloids and Interfaces,Am Mühlenberg 1,14476 Potsdam,Germany.

出　　处：《Biochar》2024年第1期787-803,共17页生物炭(英文)

摘　　要：Hydrothermal carbonization(HTC)converts wet biomass into hydrochar and a process liquid,but aromatic compounds in the products have been reported as a roadblock for soil applications as they can inhibit germination,plant growth,and soil microbial activity.Here,we compared HTC and hydrothermal humification(HTH)of cow manure digestate while varying the initial alkaline content by adding KOH.HTH converted 37.5 wt%of the feedstock to artificial humic acids(A-HAs)found in both solid and liquid,twice that of HTC.HTH reduced phenolic and furanic aromatic compounds by over 70%in solids and 90%in liquids.The A-HAs in HTH resemble natural humic acids(N-HA),based on FTIR,UV-vis spectra,and CHN and XRD analysis.The HTH liquid possesses 60%higher total organic carbon(TOC)than HTC.Although one-third of TOC can be precipitated as A-HA,a high TOC concentration remains in the liquid,which is shown to be mainly organic acids.Therefore,we also evaluated the HTC and HTH liquids for anaerobic biomethane production,and found that compared to the original cow manure digestate,the HTH liquids increased methane yield by 110.3 to 158.6%,a significant enhancement relative to the 17.2%increase seen with HTC liquid.The strong reduction in organic acids during biogas production from HTH liquid indicates the potential for converting soluble byproducts into methane,while maintaining high A-HAs levels in the solid product.

关 键 词：Hydrothermal carbonization Hydrothermal humification Artificial humic acids Aromatic compounds Anaerobic digestion 

分 类 号：F42[经济管理—产业经济]