Effect of sulfur particle morphology on the performance of element sulfur-based denitrification packed-bed reactor

The effect of particle morphology on denitrification performance in element sulfur-based denitrification (ESDeN) packed-bed process is a gap. In this study, three different types of commercial sulfur particles were selected to build the ESDeN reactors. The results showed the reactors filled with rougher sulfur particles took shorter time to reach stable denitrification performance in the start-up stage. The reactors filled with cap-shape sulfur particles received the maximum nitrate removal rate of 849.49 +/- 79.29 g N m- 3 d-1 at empty bed contact time of 0.50 h, which was 2.34 times higher than that with ball-shape sulfur particles in the steady stage. The superior deni-trification performance in the cap-shape particles set linked to its larger effective volumetric surface area (omega e, 1.67 times larger) and to the longer actual hydraulic retention time (AHRT, 1.80 times longer). This study ex-tends the knowledge of the dependency of sulfur particle properties on denitrification performance in ESDeN packed-bed reactor.

Automated summary

This study investigates the impact of different types of sulfur particles on denitrification performance in element sulfur-based denitrification packed-bed reactors. The results show that rougher sulfur particles lead to quicker stabilization of denitrification performance in the start-up stage. The reactors filled with cap-shape sulfur particles achieve the highest nitrate removal rate, which is 2.34 times higher than that of ball-shape sulfur particles. This study enhances our understanding of the relationship between sulfur particle properties and denitrification performance in ESDeN reactors.