EUBCE 2024 - Magdalena PANKIEWICZ-SPERKA - The Effect of Selected Homogeneous and Heterogeneous Catalysts and Feedstock Properties on the Formation of Aqueous Phase Contaminants During Hydrothermal Liquefaction (HTL) of Sewage Sludge

The Effect of Selected Homogeneous and Heterogeneous Catalysts and Feedstock Properties on the Formation of Aqueous Phase Contaminants During Hydrothermal Liquefaction (HTL) of Sewage Sludge

Short Introductive summary

Most of the HTL conducted studies focused on the oil fraction. There are relatively scant publications dedicated to the aqueous fraction, especially detailed studies on its composition. Water handling, including water treatment and reuse, is one of the main issues that needs to be considered before the commercial implementation of this technology. The main effort in this work was put on an attempt to investigate whether the use of different catalysts as well as different sludge in HTL process affects the composition of the resulting postprocessing waters. A novel approach here is also focus on the water-soluble organic fraction, which migrates into the aqueous phase. The comprehensive study was carried out employing two different feedstocks and with 11 different catalysts (homo and heterogeneous), in total 24 HTL tests were carried out. The conducted studies have shown that municipal sludge from different treatment plants can differ in their non-specific and physico-chemical parameters . The studies have proven both sludge type and catalyst applied have an undeniable impact on the physico-chemical properties and on the composition of the HTL wastewaters.

M. Pankiewicz-Sperka, GIG National Research Institute, Katowice, POLAND
K. Kapusta, GIG National Research Institute, Katowice, POLAND
D. Xu, School of Energy and Power Engineering, Xi’an Jiaotong University, Xian, P.R. CHINA
P. Duan, School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xian, P.R. CHINA
W. Basa, GIG National Research Institute, Katowice, POLAND
B. Hao, School of Energy and Power Engineering, Xi’an Jiaotong University, Xian, P.R. CHINA