Skip to main content

Coprocessing Water Treatment Residuals and Biosolids for Control of Water Soluble Phosphorus in Biosolids

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

Evolving phosphorus (P) nutrient management policies represent a major challenge for land-based biosolids recycling. Research indicates that release of P from land-applied biosolids into runoff and subsurface drainage is directly related to the water extractable P (WEP) content of the biosolids. Biological P removal processes, increasingly used for nutrient control, produce biosolids exceptionally high in WEP. Thus, strategies that reduce biosolids WEP are needed to sustain land application programs. This study evaluated conditions under which blending alum-based water treatment residuals (WTR) with digested wastewater sludge prior to dewatering reduces WEP and P-loss susceptibility of land-applied biosolids. Laboratory experiments showed that coprocessing WTR and biosolids at a 1:1 ratio (dry mass basis) resulted in the following: (1) substantial (>75%) reduction in WEP of the resulting biosolids; (2) soluble P in mechanical dewatering filtrate was reduced by > 50 %; and (3) the polymer dose required for conditioning was lowered by ∼15 %. While results will vary with WTR / biosolids characteristics and system operational conditions, coprocessing is one strategy for managing municipal by-products as new P-based nutrient regulations are deployed.

Keywords: Water treatment residuals; biosolids; land application; nutrient management; phosphorus

Document Type: Research Article

DOI: https://doi.org/10.2175/193864710802767506

Publication date: 2010-01-01

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 These proceedings are not peer reviewed.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