An Investigation into the Release of Chemical Oxygen Demand in Organic Filter Media
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To improve the nitrogen reduction capability of stormwater treatment systems subjected to intermittent saturation, organic materials are often added as filter media. However, these materials can be an additional source of organic carbon and increase the chemical oxygen demand (COD) in the outflow. In this study, different types of organic filter media were subjected to a batch leaching test to observe and quantify the release of COD. Results reveal that the initial pH of the tap water used for soaking which is 7.5-7.7 is conducive to the release of organics from the media to the leachate. The highest amount of COD released was observed in yard clippings and woodchip followed by compost and bark mulch. The leaching of organics also increased as the size of the media decreases due to higher surface area per volume. In addition, empirical regression analysis predicted that COD from these organic media will be exhausted from the material in 3-5 months to up to 26 months depending on the type of media. The results of this study can serve as a guide in estimating the potential release of COD in organic media in order to ensure their safe application in stormwater treatment facilities.
Abstract
To improve the nitrogen reduction capability of stormwater treatment systems subjected to intermittent saturation, organic materials are often added as filter media. However, these materials can be an additional source of organic carbon and increase the chemical oxygen demand (COD) in the outflow. In this study, different types of organic filter media were subjected to a batch leaching test to observe and quantify the release of COD. Results reveal that the initial pH of the tap water used for soaking which is 7.5-7.7 is conducive to the release of organics from the media to the leachate. The highest amount of COD released was observed in yard clippings and woodchip followed by compost and bark mulch. The leaching of organics also increased as the size of the media decreases due to higher surface area per volume. In addition, empirical regression analysis predicted that COD from these organic media will be exhausted from the material in 3-5 months to up to 26 months depending on the type of media. The results of this study can serve as a guide in estimating the potential release of COD in organic media in order to ensure their safe application in stormwater treatment facilities.
참고문헌 (17)
- Standard Methods for the Examination of Water and Wastewater, "APHA", American Public Health Association, Water Environment Federation, pp.1998, ~
- Cokgor, EU, "Influence of pH and temperature on soluble substrate generation with primary sludge fermentation", Bioresour. Technol, 100(1), pp.380~386 (2009)[DOI]
- Development of standard leaching tests for organic pollutants in soils, sediments and granular waste materials, "Comans, RNJ", Standards, Measurement and Testing Programme of the European Commission, ~, pp.ECN-C- 01–121 (2001)
- Chen, Y, "Development of a Vertical Flow Wetland for Treating First-flush from Impermeable Area", Ph. D., pp.2015
- Gülbaz, S, "Experimental Investigation on Hydrologic Performance of LID with Rainfall-Watershed-Bioretention System", J. Hydrol. Eng, 22(1), pp.D4016003~ (2016)[DOI]
- Hsieh, C, "Evaluation and Optimization of Bioretention Media for Treatment of Urban Storm Water Runoff", J. Environ. Eng, 131(11), pp.1521~1531 (2005)[DOI]
- Hunt, WF, "Pollutant Removal and Peak Flow Mitigation by a Bioretention Cell in Urban Charlotte, N.C", J. Environ. Eng, 5(134), pp.403~408 (2008)[DOI]
- Hurley, S, "Nutrient Leaching from Compost: Implications for Bioretention and Other Green Stormwater Infrastructure", J. Sustain. Water Built Environ, 3(3), pp.04017006~ (2017)[DOI]
- Infiltration through Disturbed Urban Soils and Compost-Amended Soil Effects on Runoff Quality and Quantity, "Pitt, R", United States Environmental Protection Agency, ~, pp.Report EPA (1999), 600[DOI]
- Kim, H, "Engineered Bioretention for Removal of Nitrate from Stormwater", Water Environ. Res, 75(4), pp.355~367 (2003)[DOI]
- McLaughlan, RG, "Effect of media type and particle size on dissolved organic carbon release from woody filtration media", Bioresour. Technol, 100, pp.1020~1023 (2008)[DOI]
- Munch, JM, "Physicochemical factors controlling the release of dissolved organic carbon from columns of forest subsoils", Eur. J. Soil Sci, 53, pp.311~320 (2005)[DOI]
- Niu, S, "Performance of a vertical subsurface flow(VSF)wetland treatment system using woodchips to treat livestock stormwater", Environ. Sci. : Process. Impacts, 15, pp.1553~1561 (2013)[DOI]
- Robertson, WD, "Nitrate removal rates in woodchip media of varying age", Ecol Eng, 36(11), pp.1581~1587 (2010)[DOI]
- Saeed, T, "Enhanced denitrification and organics removal in hybrid wetland columns : Comparative experiments", Bioresour. Technol, 102(2), pp.967~974 (2011)[DOI]
- Wehrer, M, "Determination of effective release rates of polycyclic aromatic hydrocarbons and dissolved organic carbon by column outflow experiments", Eur. J. Soil Sci, 56, pp.803~813 (2005)[DOI]
- Wong, MTF, "Method for determining the acid ameliorating capacity of plant residue compost, urban waste compost, farmyard manure, and peat applied to tropical soils", Commun. Soil Sci. Plan, 29, pp.2927~2937 (1998)[DOI]