Third Party Evaluates Microvi’s Technology for Ammonia and Nitrate Removal

A new third party evaluation conducted by the Johns Hopkins University / MWH Alliance has demonstrated that Microvi Biotechnologies’ innovative biocatalytic technologies for nitrification and denitrification are effective in treating wastewater for nitrogen removal.

The study was performed at the Alliance laboratory which is housed at the Johns Hopkins’ Bloomberg School of Public Health. The study evaluated Microvi’s Aerovi™ and Denitrovi™ biocatalyst technologies in treating wastewater that contained ammonia and nitrate.

Results showed that Microvi’s biocatalyst technologies substantially reduced ammonia and nitrate in the water at lower treatment times than many conventional methods, with a reduced secondary waste stream.

“We are excited that our transformative wastewater solutions have been validated by such a strong and forward-thinking company as MWH,” said Fatemeh Shirazi, CEO of Microvi. 

MWH, a global company with 7,500 employees across six continents, engages in the engineering, construction, and management of some of the largest and most technically advanced wet infrastructure, hydropower, mining and transportation projects for municipalities, governments and multi-national private corporations throughout the world. 

Microvi has partnered with MWH on several projects throughout Australia and Asia Pacific. 

The third-party evaluation at Johns Hopkins examined the effectiveness of two of Microvi’s technologies. 

Denitrovi™ utilizes novel biocatalysts to convert nitrate in water to nitrogen gas, a harmless byproduct, safely and efficiently. The Denitrovi™ technology is the first to degrade nitrate in water without producing a secondary waste stream and has dramatically lower treatment times and higher removal efficiencies than conventional systems.

Microvi’s Aerovi™ technology is a low cost, small-footprint system that effectively removes pollutants such as ammonia (NH4+) by completely degrading it into harmless products (N2 and H2O) by a special population of organisms as part of the Aerovi™ biocatalysts. 

About MWH
MWH is a strategic consulting, technical engineering and construction services firm leading the wet infrastructure sector. Offering a full range of services and innovative, award-winning solutions beginning in the initial planning phases through construction and asset management, the firm partners with its clients in multiple industries to implement projects and programs that focus on water, energy, natural resources and infrastructure. MWH’s 7,500 employees in 35 countries spanning six continents are dedicated to fulfilling the goal of Building a Better World, which reflects its commitment to sustainable development. MWH is a private, employee-owned firm with a rich legacy beginning in 1820. For more information, visit their website at

About Microvi
Microvi is a green technology company based in the San Francisco Bay Area that delivers next-generation biotechnologies for the water, wastewater and renewable chemical industries. Microvi offers commercial technologies around the world to reduce waste, increase productivity and provide disruptive economics across the value chain. Learn more at



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