Next Article in Journal / Special Issue
Combination of Slag, Limestone and Sedimentary Apatite in Columns for Phosphorus Removal from Sludge Fish Farm Effluents
Previous Article in Journal
Analysis of Different Freezing/Thawing Parameterizations using the UTOPIA Model
Water 2010, 2(3), 484-499; doi:10.3390/w2030484
Article

EAF Steel Slag Filters for Phosphorus Removal from Milk Parlor Effluent: The Effects of Solids Loading, Alternate Feeding Regimes and In-Series Design

1,*  and 2
1 AgRefresh, 29 Church Street Suite 29-2-1, P.O. Box 843, Burlington Vermont, 05401 VT, USA 2 Jeffords Building, Department of Plant and Soil Science, University of Vermont, Burlington Vermont, 05405 VT, USA
* Author to whom correspondence should be addressed.
Received: 20 July 2010 / Accepted: 18 August 2010 / Published: 23 August 2010
Download PDF [212 KB, uploaded 23 August 2010]

Abstract

Electric arc furnace (EAF) steel slag filters were investigated for their efficiency at reducing the concentration of phosphorus (P) from dairy farm wastewater in Vermont. The primary objective for this study was to examine the use of in series design on filters’ performance in P removal from dairy farm wastewater at subzero temperatures. Other research objectives were to investigate operational parameters such as the effects of total suspended solids (TSS) daily mass loading rates and of alternating feeding and resting periods on EAF steel slag filters’ TSS, dissolved reactive phosphorus (DRP) and total phosphorus (TP) removal efficiencies and filter system life-span. The utilization of in series filter design increased filter DRP removal efficiency by 35%. In series design also allows for alternating feeding and resting periods, which resulted in a 16%, 57% and 74% increase in TSS, DRP and TP removal efficiencies, respectively, by the first filter in series over a single period. Additionally, the system life span was extended 3.25 fold (from 52 to 169 day). Based on this research, we recommend alternate feeding and resting cycles and in series design to be integrated in the design of EAF steel slag filter systems for highly concentrated agricultural effluents in cold climates.
Keywords: phosphorus removal; concentrated waste influent; steel slag filters; cold climate; total suspended solids (TSS); dissolved reactive phosphorus (DRP) phosphorus removal; concentrated waste influent; steel slag filters; cold climate; total suspended solids (TSS); dissolved reactive phosphorus (DRP)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Export to BibTeX |
EndNote


MDPI and ACS Style

Bird, S.C.; Drizo, A. EAF Steel Slag Filters for Phosphorus Removal from Milk Parlor Effluent: The Effects of Solids Loading, Alternate Feeding Regimes and In-Series Design. Water 2010, 2, 484-499.

View more citation formats

Article Metrics

Comments

Citing Articles

[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert