Technology introduction:“SANI Technology”is a new energy-saving low carbon sewage treatment technology, by research group of Professor Chen Guanghao from Hong Kong University of Science and Technology(HKUST) , co-promoted by Kinghome Environmental Technologies(China)Co., Ltd and HKUST.Full name of SANI Technology: Sulfate reduction Antotrophic denitrification and Nitrification Integrated. It is mainly applied to treatment of sanitary waste seawater in coastal region.

　　Technical Principles

　　Technical principle: compared with traditional activated sludge carbob-nitrogen cycle technology, SANI technology introduces sulfur cycle and separate carbon-nitrogen cycle successfully by sulfur cycle. It utilizes sulfate in salt waste water as electron carrier skillfully, oxidize organic pollutant in waste water by reduction process of biology anaerobic sulfate, and produces basicity to make a large number of electrons flow to SO by alienation metabolism and produces soluble sulfide. On the contrary, as few electrons flow to assimilation metabolism, sludge rate is reduced significantly. However, sulfides carrying many electrons have not accomplished their mission. hey will flow to anoxic reactor with water to provide electrons for autotrophic denitrification, and turn to nitrogen by nitrate nitrogen generated in the process of nitrifying process via autotrophic denitrification, so as to remove nitrogen biologically. By sulfide cycle, SANI technology not only reduces oxygen consumption in COD removal process but also realizes zero release of surplus sludge by three biochemical reaction with low sludge yield. Sludge yield of SANI technology is only 0.04gvss/g COD—removed, about 10% of restricted activated sludge technology.

　　Technical Advantage

　　① No primary settling tank or secondary sedimentation tank, zero release of surplus sludge

　　② Dispose high-salt municipal wastewater (flushing seawater), prevent foul smell generation effectively, which is of great significance to seawater flushing popularization and saving of fresh water resource

　　③ COD removal rate is 95%, TN removal rate reaches above 76%

　　④ It saves 75% of floor area, 20% of capital cost, and reduces 50% of operating cost

　　⑤ Effluent water quality is stable and has no sludge bulking

　　⑥ Convenient operation management, easy to realize automatic control

　　Application Prospect

　　① Application and promotion of SANI technology and seawater flushing technology in coastal region can effectively solve the issue that coastal cities lack of fresh water resources

　　② Technical transformation of urban sewage treatment plant in coastal cities, just add 20% of seawater, SANI technology

　　on-site transformation can be carried out(HO-SANI)

　　③ Dispose urban sludge by SANI technology application(CHEM-SANI)which disposes inland urban sewage by waste water containing sulfate

　　④ Conduct research on sulfur circulation DS-EBPR technology(BioP-SANI) , explore new approach to biological enhancement phosphorous removal and basic research.