Ivan Zhu

Evoqua Water Technologies

Dr. Ivan Zhu has highly specialized expertise in biological wastewater treatment, membrane applications to industrial and municipal water and wastewater treatment, flocs and biofilm characterization in terms of microbial community distribution and extra-cellular polymeric substances, and membrane fouling characterization. He has applied his knowledge of separation processes to evaluation and design of water and wastewater chemical/biological treatment processes. Previously, he worked at Xylem Water Solutions, where he gained extensive experience in drinking water treatment, wastewater tertiary treatment, denitrification, biological active filtration, ozone-enhanced biofiltration, and dissolved air flotation. Presently, he is working at Evoqua Water Technologies as a Senior Applications Engineer for integrated industrial solutions for water and wastewater treatment. He holds a bachelor’s degree from Shanghai Jiaotong University in Shanghai, China, and masters and doctoral degrees from the University of Toronto, Ontario, Canada.

Ivan Zhu

3books edited

3chapters authored

Latest work with IntechOpen by Ivan Zhu

Nitrification and denitrification are essential processes for the aquatic ecological system and vital for human health. While ammonia is applied for disinfection together with chlorine to produce chloramine, excessive ammonia may cause nitrification and bacteria growth in the water transmission pipeline. Since excessive discharge may cause eutrophication and deterioration of the aquatic system, nitrate is regulated for wastewater discharge in sensitive areas. Further, nitrate needs to be monitored and controlled in drinking water treatment to protect against methemoglobinemia in bottle-fed infants. Various conventional technologies exist, such as adsorption, ion exchange, photocatalytic oxidation, air stripping, biological nitrification and denitrification, and so on, to remove nitrogenous compounds from water. Since ammonia and nitrate are important constituents in fertilizers besides phosphorus (P) and potassium (K), nutrient recovery is drawing attention to maintaining the supply of reliable and sustainable fertilizers. This book provides a comprehensive overview of nitrification and denitrification.

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