Speakers - 2027

Title: Removal of hydrogen sulfide from biogas by using the water scrubbing techniques

Abstract

Renewable energy is one of the most important sources of energy worldwide. Biogas is produced under anaerobic conditions from organic waste and is used as a fuel for electricity generation at the Mashhad Recycling Industrial Complex. In this study, hydrogen sulfide was removed from biogas using water-scrubbing techniques based on gravity and stepped configurations. The results showed hydrogen sulfide removal values ranging from 34% to 87%, with removal efficiencies of 34% to 97%. The hydrogen sulfide loading rate ranged from 8.1 to 40.8 g/m³·h, while the elimination capacity ranged from 7.3 to 20.9 g/m³·h. The study presents a novel approach to the design and construction of water-scrubbing systems. Compared with similar systems, the proposed design incorporates a vertical stepped arrangement and a vacuum pump to separate residual gases. A key advantage is the use of gravity to facilitate water flow, reducing the need for additional water pumps and consequently lowering energy consumption.