Department of Mechanical Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan; Original affiliation: Department of Mechanical Engineering, Universitas Lambung Mangkurat, Banjarmasin, South Kalimantan, Indonesia.
Department of Mechanical Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan.
Bioresour Technol. 2018 Feb;249:276-283. doi: 10.1016/j.biortech.2017.10.002. Epub 2017 Oct 5.
In this study, a process for the continuous recovery of phosphorus and generation of gas from sewage sludge is investigated for the first time using supercritical water gasification (SCWG). A continuous reactor was employed and experiments were conducted by varying the temperature (500-600 °C) and residence time (5-60 s) while fixing the pressure at 25 MPa. The behavior of phosphorus during the SCWG process was studied. The effect of the temperature and time on the composition of the product gas was also investigated. A model of the reaction kinetics for the SCWG of sewage sludge was developed. The organic phosphorus (OP) was rapidly converted into inorganic phosphorus (IP) within a short residence time of 10 s. The gaseous products were mainly composed of H, CO, and CH. The reaction followed first order kinetics, and the model was found to fit the experimental data well.
本研究首次采用超临界水气化（SCWG）工艺，从污水污泥中连续回收磷并生成气体。采用连续式反应器，在固定压力为 25 MPa 的条件下，通过改变温度（500-600°C）和停留时间（5-60 s）进行实验。研究了磷在 SCWG 过程中的行为，考察了温度和时间对产物气体组成的影响。建立了污水污泥 SCWG 的反应动力学模型。在 10 s 的短停留时间内，有机磷（OP）迅速转化为无机磷（IP）。气态产物主要由 H、CO 和 CH 组成。反应遵循一级动力学，模型与实验数据拟合良好。
