SANI wastewater treatment process - HKUST’s Novel Sewage Treatment Technology Trial Run Securing the Biggest Sponsorship with Five International Awards
A research team from the Hong Kong University of Science and Technology (HKUST) led by Prof Guanghao Chen of the Department of Civil and Environmental Engineering has leveraged Hong Kong’s unique seawater flushing system to develop a novel, energy efficient and low carbon sewage treatment technology. A large-scale trial run of the ‘Sulphate reduction, Autotrophic denitrification and Nitrification Integrated (SANI) Process’ will soon be going in full swing under the joint sponsorship of the Drainage Services Department, the Innovation & Technology Fund and others which pitched in HK$24.6 million, the biggest sponsorship for a local single environmental project. This pioneering comprehensive water management and sewage treatment platform has also been enthusiastically honored beyond borders, earning five international awards in 2012 including the Huber Technology Prize of Germany, the Finalist of the World Smart Cities Awards of Spain and three other prestigious awards of the International Water Association (IWA). The HKUST team was also invited by the UNESCOIHE Institute of Water Education to join a four year research to develop this environmentally friendly and economically viable practice. Its findings have been copublished at an IWAhosted magazine Water21, especially for third world countries hard hit by water scarcity, such as Cuba.
Large-scale trial of SANI process kicks off at Shatin Sewage Treatment Works Prof Guanghao Chen explained, “The research on SANI process started in 2004, followed by a pilot test jointly hosted with the Drainage Services Department at Tung Chung between 2007 and 2010. Results showed that this novel technology effectively eliminated 90% of sewage sludge production, reducing the sewage treatment cost by 50% and space requirement by over 50%, and cutting down greenhouse gas emissions by 35%.”
The Hong Kong Government is relocating the Sha Tin Sewage Treatment Works to Caverns. The Drainage Services Department (DSD) is actively exploring advanced sewage treatment technologies to reduce the required cavern space and shorten the construction period. The SANI® Process is one of the technologies that the DSD is exploring. For details, please visit
For details of the technology, please visit http://www1.ce.ust.hk/sani/