Catalytic Deodorizer
Project Overview
About
Urban drainage systems can release hydrogen sulphide, ammonia and volatile organic compounds, creating unpleasant odours and potential health risks for nearby communities. Installed at manholes, culverts and outfalls, the Catalytic Deodorizer captures moisture from the surrounding air to activate a catalyst that transforms these pollutants at room temperature without external power. Field trials across ten urban drainage sites recorded removal rates of up to 99%. The catalyst can be regenerated for reuse, offering municipalities a compact, low-energy alternative to large mechanical scrubbers.
Team
Xujia Zeng
Xujia ZENG is an environmental researcher at HKUST specializing in advanced catalytic odor mitigation. Representing the "Catalytic Deodorizer" project, Xujia spearheads the deployment of novel active-oxygen and catalytic technologies engineered to neutralize coastal H2S emissions. Leveraging deep expertise in experimental design and multi-site environmental monitoring, Xujia translates advanced chemical engineering into scalable, high-impact municipal solutions. At P4H, they are eager to engage public stakeholders and present next-generation, eco-friendly systems for sustainable urban sanitation.
Malvin Subroto Pamudji
Malvin Subroto PAMUDJI is a PhD candidate in Chemical and Biomolecular Engineering at The Hong Kong University of Science and Technology, building on a Bachelor of Engineering and Master of Philosophy in the same field. His research sits at the intersection of science and public health, where he works on translating laboratory advances into real-world impact. PAMUDJI has contributed to several government-led initiatives, helping to design and deploy evidence-based solutions with measurable benefits for society.