Skip to main content

Recovery of Nutrients from Anaerobic Co-digestion Effluents of Poultry Manure and Sewage Sludge as Struvite

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

Nutrient recovery from effluents of an anaerobic digestor co-digesting poultry manure and sewage sludge via struvite precipitation was successfully demonstrated. A set of mesophilic anaerobic batch reactors were operated using poultry manure and sewage sludge as the substrates. The struvite precipitation experiments were conducted with the liquid phase of these reactors. The total COD removals and the methane yields of the reactors ranged between 43–63 % and 146–228 mLCH4/gCOD added, respectively. The effects of pH, seeding and calcium on struvite precipitation process were investigated. The results revealed that high NH4–N recovery efficiencies (77 – 84 %) were possible by the adjustment of struvite stoichiometry (Mg:N:P of 1:1:1) in the reactors effluents. It was also observed that the final pH adjustment did not result in any significant increase in the removal of NH4–N at the pH levels tested (8.0, 8.5 and 9.0). Moreover, the seeding material addition was investigated to improve the performance of struvite formation by providing the adequate surface for reaction. The impact of seeding on residual NH4–N concentration was negligible, however its impact on residual PO4–P concentration was significant and highly dependant on the composition of the wastewater used. Calcium concentration in the effluents was much higher than other metal concentrations and its effect on struvite precipitation was investigated through varying the Mg:Ca molar concentration ratio. The results indicated that Ca has inhibitory effects of the struvite reaction. The presence of Ca led to formation of calcite and amorphous calcium phosphates that were detectable through XRD. The results depicted that the addition of Mg ion above the molar concentration of PO4–P together with Ca ion helped to remove most of the phosphorus even in low phosphorus wastewaters.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Keywords: Anaerobic co-digestion; nutrient recovery; poultry manure; sewage sludge; struvite

Document Type: Research Article

Publication date: 2011-01-01

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
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