Department of Heat Engineering and Environment Protection, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, 30 Mickiewicza Avenue, 30-059, Krakow, Poland.
J Environ Manage. 2023 Nov 1;345:118820. doi: 10.1016/j.jenvman.2023.118820. Epub 2023 Aug 21.
This research is focused on the addition of a catalyst, sulphuric acid (VI), to sewage sludge, and its effect on solid and liquid products resulting from the hydrothermal carbonization process. Consequently, for hydrochars, proximate and ultimate analyses, higher heating value and specific surface area were determined. Additionally, Fourier-transform infrared spectrophotometric and thermogravimetric analyses were conducted. The heavy metal contents in the ash composition of hydrochars were identified by X-ray fluorescence spectrometry. It was confirmed that the catalyst addition changed the structure as well as the physical and chemical properties of hydrochars and their ashes. Regarding post-processing water, both pH value and conductivity were determined and the element composition, including heavy metals, was conducted by the inductively coupled plasma optical emission and mass spectrometry analyses. It was found that the addition of the catalyst caused a decrease in heavy metal contents and an increase of phosphorus compound in filtrates.
本研究集中于在污水污泥中添加催化剂硫酸（VI），并研究其对水热碳化过程中产生的固液产物的影响。因此，对水热炭进行了近似分析、最终分析、高位发热量和比表面积的测定。此外，还进行了傅里叶变换红外分光光度法和热重分析法。采用 X 射线荧光光谱法鉴定水热炭灰分中的重金属含量。结果证实，催化剂的添加改变了水热炭及其灰分的结构以及物理化学性质。关于后处理水，测定了 pH 值和电导率，并通过电感耦合等离子体发射和质谱分析了元素组成，包括重金属。结果发现，催化剂的添加导致滤液中重金属含量降低，磷化合物含量增加。
