Skip to main content

Iron Reduction-Induced Phosphorus Precipitation in Septic Systems

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

Abstract:

An iron-amended anaerobic sequencing batch reactor (ASBR) fed with synthetic sewage was studied to explore the feasibility of iron reduction-induced phosphate precipitation in septic systems. The results revealed that soluble phosphate was effectively removed from sewage as the supplemented amorphous ferric oxyhydroxide (A-FeOOH) was reduced. At an Fe/P (molar ratio of Fe(III) to soluble P) of 3, the efficiency of phosphorus removal was greater than 96 %. Agitation was found to be an important factor to enable better contact between A-FeOOH and microbes, whereas cycle time, temperature and substrate concentration did not have a noticeable effect on iron reduction and the consequential phosphorus removal. Analyses using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) indicated that vivianite [Fe3(PO4)2ยท8H2O] was the main secondary mineral resulting from iron reduction.

Keywords: Phosphorus removal; iron reduction; septic system; vivianite

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864710798207288

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 These proceedings are not peer reviewed.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
Partial Open Access Content
Partial Open access content
Subscribed Content
Subscribed content
Free Trial 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