秀珍菇菌糠制备生物炭及理化性质研究

Preparation of biochar from spent pleurotus geesteranus substrate and its physicochemical properties

为开发秀珍菇菌糠生态化循环高效利用关键技术,特开展秀珍菇菌糠生物炭制备工艺研究;并利用扫描电镜、元素分析仪等对生物炭的理化性质进行初步分析。结果表明,秀珍菇菌糠生物炭均一性较差,表面孔隙结构随着温度的升高而增多;秀珍菇菌糠水热法制备生物炭的产率约为45%～55%,且随着反应时间的增加或反应温度的升高产率降低,其C元素和O元素的变化趋势与反应温度、水热时间相关性显著,温度越高、时间越长,C元素含量越高,O元素含量越低。热解法制备生物炭的产率约30%,且随着反应温度升高而下降明显,其C元素含量呈现先降低后升高趋势。因此,利用秀珍菇菌糠制备生物炭具有可行性,可作为食用菌菌糠生态化循环利用的解决方案。

The preparation technology of biochar was investigated, by using the spent pleurotus geesteranus substrate (SPGS) as raw material, with a view to developing the technology of ecological recycling and efficient utilization of spent mushroom substrate. The physicochemical properties of biochar were analyzed with the scanning electron microscopy and the elemental analyzer. The results show that homogeneity of the biochar is fairly poor and the surface pore structure increases with the increase of temperature. Yield of the hydrochar is about 45%-55%, decreasing with the increase of reaction time or temperature. The variation trend of C and O elements is significantly correlated with reaction temperature and time, the higher the temperature and the longer the time, the higher content of C and the lower content of O. Yield of the pyrolytic biochar is about 30%, decreasing obviously with the increase of temperature, with the content of C element decreasing first and then increasing. It can be concluded that it is feasible to prepare biochar SPGS, which can be used as a reference technology to solve the ecological recycling of edible fungi.