Skip to main content

Full Scale Plant Testing of a Process that Uses Sewage Sludge to Produce an Organically-Enhanced Granular Nitrogen Fertilizer

The full text article is not available for purchase.

The publisher only permits individual articles to be downloaded by subscribers.

or click here to sign up for a free trial


A full scale granulation testing facility was utilized to confirm process chemical and physical operating parameters and product fertilizer composition for the production of an inorganic/organic (sewage sludge) granulated nitrogen fertilizer. This technology was developed and commercialized in 1996 and optimized in full scale testing completed in 2006 and 2008. Dewatered sewage sludge was used as a replacement for water as the granulator pipe-cross reactor cooling agent. Pipe-cross reactor raw materials included sulfuric acid, anhydrous ammonia, and conditioned sludge. Granulator raw materials included slurry discharge from the pipe cross reactor, anhydrous ammonia, aluminum sulfate, granulated ferric sulfate, and recycled product. Final fertilizer product meets all EPA Part 503 standards and fertilizer industry standards end point conditions of hardness, critical relative humidity and moisture including 17-18% nitrogen with 7.5% organic matter, 4% total carbon, 3% amino acids and micronutrients. This is a true beneficial use technology with value added components that recycle important nutrients to farm soils with less nutrient loss to the environment.

Keywords: amino acids; fertilizer; granulation; micronutrients; nitrogen; organic matter; pipe-cross reactor; sewage sludge

Document Type: Research Article


Publication date: January 1, 2010

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Ingenta Connect is not responsible for the content or availability of external websites

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more