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  • Open Access


    Effects of Biowaste-Derived Hydrochar on Anaerobic Digestion: Insights into Hydrochar Characteristics

    Hongqiong Zhang1,2,#, Xu Wang3,#, Zhaojing Qian4, Buchun Si1,4,*, Kai Jin5, Tengfei Wang5

    Journal of Renewable Materials, Vol.11, No.10, pp. 3647-3657, 2023, DOI:10.32604/jrm.2023.028438

    Abstract Hydrochar prepared with four typical biowastes, pine wood, food waste, digested sewage sludge, and Chlorella were applied for the promotion of anaerobic digestion. The gas production and substrate composition were analyzed associated with the hydrochar characteristics. The results suggested that Chlorella hydrochar (C-C) showed the highest cumulative yield of methane (approximately 345 mL) with high total organic carbon (TOC) removal efficiency and low volatile fatty acids (VAFs) concentration. Especially, food waste hydrochar (F-C) showed a poor effect on anaerobic digestion and aroused 1.4–1.6 g/L accumulation of VAFs, in which the toxic components may account for More >

  • Open Access


    Hydrochar Pelletization towards Solid Biofuel from Biowaste Hydrothermal Carbonization

    Ao Li, Kai Jin, Jinrui Qin, Zhaowei Huang, Yu Liu, Rui Chen, Tengfei Wang*, Junmin Chen*

    Journal of Renewable Materials, Vol.11, No.1, pp. 411-422, 2023, DOI:10.32604/jrm.2022.024889

    Abstract Hydrothermal carbonization is highly applicable to high moisture biomass upgrading due to fact that moisture involved can be directly used as reaction media under subcritical-water region. With this, value-added utilization of hydrochar as solid fuel with high carbon and energy density is one of the important pathways for biomass conversion. In this review, the dewatering properties of hydrochar after the hydrothermal carbonization of biowaste, coalification degree with elemental composition and evolution, pelletization of hydrochar to enhance the mechanical properties and density, coupled with the combustion properties of hydrochar biofuel were discussed with various biomass and More > Graphic Abstract

    Hydrochar Pelletization towards Solid Biofuel from Biowaste Hydrothermal Carbonization

  • Open Access


    Effect of Reaction-Finished Solution of Hydrochar (HRFS) Application on Rice Grain Yield and Nitrogen Use Efficiency in Saline Soil

    Zhenghua Yi1, Paramsothy Jeyakumar2, Jiang Jiang1, Xiaomian Zhang3, Chunlei Yue3, Haijun Sun1,*

    Phyton-International Journal of Experimental Botany, Vol.91, No.4, pp. 859-868, 2022, DOI:10.32604/phyton.2022.018396

    Abstract We conducted a pot experiment to examine the feasibility of applying a reaction-finished solution of hydrochar (HRFS) to enhance rice production in a saline soil. With this purpose, HRFS was applied (0, 10, 20, 40, 60, 80 and 100 mL/pot) and rice yield and nitrogen (N) use efficiency (NUE) were determined. HRFS application significantly (P <0.05) increased rice grain yield by 19.6%–30.0% compared to the control treatment (CKU, with N but without HRFS addition). Moreover, HRFS application promoted plant height and straw biomass of rice. Increases of rice yield were mainly achieved by increases in the number… More >

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