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Collison Engineering owns the patent for the zeolite-anammox process, and has been developing the system since 2010. 

What do we do?

Planning and Feasibility Studies

•  Design, build, & run pilot plants

•  Sampling, testing, reports

Intermediate and Full-scale Systems

•  Consulting services

•  Teaming and supervision of design work

•  Teaming and supervision of consruction


We are not hiring right now but resumes and/or letters of interest are always welcome. Send a email to if you're interested. 


Long term vision

We believe that the low cost and simplicity of this system will have a major effect on limiting global nitrogen pollution.


CWEA Research Project of the Year (Bay Area, 2014).


CWEA Research Achievement Runner Up (California state-wide, 2015).

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