Helmholtz Centre for Environmental Research-UFZ, Department of Environmental Engineering, Permoserstr. 15, D-04318 Leipzig, Germany.
Helmholtz Centre for Environmental Research-UFZ, Department of Environmental Engineering, Permoserstr. 15, D-04318 Leipzig, Germany.
Bioresour Technol. 2015;189:145-153. doi: 10.1016/j.biortech.2015.03.146. Epub 2015 Apr 3.
The invasive aquatic plant Elodea nuttallii was subjected to hydrothermal carbonization at 200 °C and 240 °C to produce biochar. About 58% w/w of the organic carbon of the pristine plant was translocated into the solid biochar irrespectively of the operating temperature. The process water rich in dissolved organic matter proved a good substrate for biogas production. The E. nuttallii plants showed a high capability of incorporating metals into the biomass. This large inorganic fraction which was mainly transferred into the biochar (except sodium and potassium) may hamper the prospective application of biochar as soil amendment. The high ash content in biochar (∼ 40% w/w) along with its relatively low content of organic carbon (∼ 36% w/w) is associated with low higher heating values. Fatty acids were completely hydrolyzed from lipids due to hydrothermal treatment. Low molecular-weight carboxylic acids (acetic and lactic acid), phenols and phenolic acids turned out major organic breakdown products.
受入侵水生植物水蕴草在 200°C 和 240°C 下进行水热碳化，以生产生物炭。无论操作温度如何，原始植物中约 58%的有机碳都转移到了固体生物炭中。富含溶解有机物的工艺水被证明是沼气生产的良好基质。水蕴草植物具有将金属掺入生物质中的高能力。这一无机部分主要转移到生物炭中（除了钠和钾），可能会阻碍生物炭作为土壤改良剂的潜在应用。生物炭中的高灰分（约 40%w/w）以及相对较低的有机碳含量（约 36%w/w）与低热值有关。由于水热处理，脂肪酸完全从脂质中水解。低分子量羧酸（乙酸和乳酸）、酚类和酚酸是主要的有机分解产物。
