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231223s2008 xx |||||o 00| ||eng c |
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|a 10.2166/wst.2008.526
|2 doi
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|a pubmed24n0616.xml
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|a eng
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|a Clifford, E
|e verfasserin
|4 aut
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|a Dairy washwater treatment using a horizontal flow biofilm system
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|c 2008
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|a Text
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 27.01.2009
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|a Date Revised 21.11.2013
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|a published: Print
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|a Citation Status MEDLINE
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|a IWA Publishing 2008.
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|a In Ireland, land-spreading is the most widely used method for treating dairy wastewaters. This can be labour intensive and can cause, in some cases, nitrate contamination of groundwater. In this study a simple pilot-scale horizontal flow biofilm reactor (HFBR) with a step-feed was developed and tested at a dairy farm site in County Offaly, Ireland for partial remediation of this soiled water prior to landspreading.During the 122-day study, the top surface plan area (TSPA) hydraulic loading rate was 50 L/m2/day. Influent concentrations averaged: 2904.2 mg total chemical oxygen demand (COD)/L, 950 mg 5-day biochemical oxygen demand (BOD5)/L and 177.9 mg total nitrogen (TN)/L. Between Days 1 and 45 frequent ambient temperatures below 4 degrees C inhibited the build-up of biomass resulting in low removals. From Day 45 the HFBR unit removed 74.9% total COD and 69.6% BOD5, equivalent to TSPA removals of 108.8 g COD/m2/day and 33.1 g BOD5/m2/day. On Sheet 29, by the end of the study, the NH4-N had reduced from 123.1 mg/L in the influent to 37.0 mg/L. TN removal in the reactor averaged 56.0% equating to a TSPA removal rate of 5.0 g TN/m2/day.The HFBR does not require any mechanical aeration, was simple and inexpensive to construct and can provide a robust and economical alternative for the remediation of agricultural soiled water before landspreading
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|a Journal Article
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|a Industrial Waste
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|a Water Pollutants
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|a Carbon
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|a 7440-44-0
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|a Nitrogen
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|a Oxygen
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|a S88TT14065
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|a Rodgers, M
|e verfasserin
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|a Paor, D de
|e verfasserin
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|i Enthalten in
|t Water science and technology : a journal of the International Association on Water Pollution Research
|d 1986
|g 58(2008), 9 vom: 24., Seite 1879-88
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|g volume:58
|g year:2008
|g number:9
|g day:24
|g pages:1879-88
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|u http://dx.doi.org/10.2166/wst.2008.526
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