Skip to main content

LOW PRESSURE FORMATION OF STRUVITE

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

Struvite, MgNH4PO4•6H2O, precipitation causes operational problems in plants handling anaerobically digested biosolids. The typical method of struvite inhibition is adding ferric chloride, FeCl3. Ferric chloride is extremely corrosive and is thus difficult to handle. Also the addition of ferric chloride can lead to another precipitate-vivianite, Fe3(PO4)2. This paper proposes exposing the biosolids to low pressure, causing carbon dioxide (CO2) to be released from solution, thereby decreasing the carbonate concentration. Removing carbon dioxide from solution would affect struvite solubility in two ways: 1) Raise the pH of the solution; 2) Magnesium forms a ion pair with the carbonates, by removing the carbonates magnesium is made available for struvite formation. Both of these would decrease struvite solubility. This paper will present research showing that when anaerobic biosolids are exposed to low pressure the pH did rise and the concentration of all struvite components decreased. Using this process would allow struvite to be formed under controlled conditions. The advantage of forming struvite under these conditions is it will prevent struvite from forming on piping, pumps and equipment. In addition by not using ferric chloride the possibility of vivianite formation is eliminated.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 2000-01-01

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 These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
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