Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 5/3/2007
Publication Date: 11/4/2007
Citation: Grubb, K.L., Mcgratch, J.M., Penn, C.J., Bryant, R.B., Kleinman, P.J.A., Allen, A.L. 2007. In-situ treatment of non-point source pollution part 2: Field results from two different treatment structures[abstract]. ASA-CSSA-SSSA Annual Meeting Abstracts. Paper No. 243-5. Interpretive Summary: An interpretive summary is not required.
Technical Abstract: Phosphorus (P) sorbing materials (PSMs) have been used to reduce dissolved P (DP) concentrations in surface runoff and leachate via applications to soils and animal manure. In August, 2006, a P removal structure filled with an aluminum oxide, iron oxide and calcium sulfate/carbonate rich residual derived from the treatment of acid mine drainage was designed to sorb (precipitation and/or adsorption) P from flowing ditchwater. The P removal ditch box is being field tested on a small agricultural ditch that drains 2.5 ha on the University of Maryland Eastern Shore agricultural experiment station. This paper provides an update on the long term (1 year) performance of the ditch box. It also reports the design, construction and field scale performance of a gypsum bed filtration system for treating drainage waters in a larger, Public Drainage Association ditch that drains an 18 ha area that crosses farm boundaries. Performance of these ditch filtration systems is evaluated in terms of cost of filtration system construction and maintenance, availability and environmental safety of the PSMs, P-sorption efficiency, and cost of disposing of P-saturated PSMs, all of which are determining factors for the feasibility of wide-spread adoption of these practices.