不同水热炭化条件处理青霉素菌渣制备生物炭

Biochar preparation from penicillin residues treatment under different hydrothermal carbonization conditions

为了考察不同水热炭化条件处理青霉素菌渣制备的生物炭特征,采用菌渣中分别添加氯化钠、柠檬酸和硝酸铁为添加剂和分别设置不同温度的方法,分析不同温度、不同添加剂对水热炭化产物特征的影响。结果表明,在210℃时,各种样品的干重产率较高。对于水热产物结构,RNa温度最佳为210℃;RAc和RFe最佳温度为180℃。在180℃时,RH产物孔径平均当量直径最大为3.61μm;RNa、RAc、RFe变化不大,分别为3.08、3和3.16μm,变化幅度小于0.2μm;在210℃时,对照产物孔径平均当量直径大于180℃时产物为3.94μm;而RNa为2.99μm,RAc、RFe孔径依次减小,为别为2.33μm和1.84μm。添加剂对产物孔径平均当量直径有影响,而添加剂种类影响不大;温度变化对RNa产物孔径平均当量直径影响不大,对RFe产物影响最明显。

In order to investigate the biochar characteristics prepared from penicillin residues under different hydrothermal carbonization conditions, the effects of additives such as sodium chloride, citric acid or ferric nitrate, and temperature on the characteristics of hydrothermal carbonization products were determined. The results showed that the highest dry weight production rates for various samples occurred at 210 ℃. The optimum hydrothermal product structures happened at 210 ℃ for RNa or 180 ℃ for RAc and RFe. At the temperature of180 ℃, the average equivalent pore diameter of RH was the highest with a value of 3.61 μm, while such diameters of RNa, RAc and RFe presented slight changes within ranges less than 0.2 μm, and were 3.08, 3 and3.16 μm, respectively. The average equivalent pore diameter of the control product at 210 ℃ was larger than that at 180 ℃ and its value was 3.94 μm. At this temperature, the average equivalent pore diameter of RNa was 2.99μm, for RAc and RFe, their diameters decreased in turn and were 2.33 μm and 1.84 μm, respectively. The results show that the additives had effects on the average equivalent pore diameters of the products, but their type had slight effects. The temperature change had slight effect on the average equivalent pore diameter of RNa product, but had an obvious effect on RFe product.