Focus on Total Inorganic Nitrogen: Operating Considerations at Plants Meeting Very Low Effluent Nitrogen Limits

deBarbadillo, C.; Barnard, James; Rectanus, R.

doi:10.2175/193864707787976894

Cited by 1 publication

(1 citation statement)

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“…An evaluation of Florida BNR plants using 36 months of data was able to distinguish between technologies (Jimenez et al, 2007), perhaps because the longer period consistently employed more accurately captured variability within the plants. One investigation focused on daily data rather than monthly or annual average data and was able to draw conclusions about operating conditions and process design differentiation between plants (deBarbadillo et al, 2007). Based on these prior investigations, 36 months of data was the threshold for inclusion of plants and technologies during the current investigation.…”

Section: Approachmentioning

confidence: 99%

WEF/WERF Cooperative Study of BNR Plants Approaching the Limit of Technology: I. What Can We Learn About the Technologies?

Parker¹,

Bott²,

Neethling³

et al. 2009

proc water environ fed

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The Water Environment Federation (WEF) and the Water Environment Research Foundation (WERF) cooperated in a comprehensive study of nutrient removal plants designed and operated to meet the "Limit of Technology" (LOT) for nutrient removal. LOT has been defined as plants meeting 3 mg/L TN and 0.1 mg/L TP. This effort focuses on maximizing what can be learned from existing full scale plants. In general, there were technologies that can reliably meet these requirements, but the key issue is the "averaging" period. Only some of the technologies can meet the LOT limits on a maximum month basis without significant violations during a permit cycle; alternatively, annual rolling average permits embody much less risk of violations. When seasonal and annual limits are equally protective of the environment as monthly limits, both the regulated and regulatory communities would be better served by reducing the frequency of reporting violations for events that have no environmental consequence.

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Section: Approachmentioning

confidence: 99%