Can Tertiary Phosphorus Removal Reliably Produce 10 7mu;g/L? Pilot Results from Coeur D'Alene, ID

Benisch, Mario; Clark, Dave; Neethling, JB; Fredrickson, H. Sid; Gu, April Z.

doi:10.2175/193864707787977190

Cited by 4 publications

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“…Only limited values of SNRP in enhanced treated wastewater effluents is available. Gu et al (2011) and Benisch et al (2007) reported values in the range of 5-20 ug/L; some industrial dominated wastewaters could have higher SNRP concentrations.…”

Section: Nitrogen Concentration Mg N/lmentioning

confidence: 96%

WERF Nutrient Challenge – Nutrient Regulations, Treatment Performance, and Sustainability Collide

Neethling¹,

Falk²,

Reardon³

et al. 2011

proc water environ fed

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The WERF Nutrient Challenge has developed a series of projects to provide information regarding evolving numeric nutrient criteria, how reliable existing technologies perform to meet treatment objectives, the sustainability impacts of nutrient removal at meeting various treatment levels, and other factors. This paper provides a national perspective on the approaches taken by states and other agencies to set in-stream nutrient criteria and the approach to set discharge limits for treatment plants. The approaches range from implementing EPA's ecoregion criteria to TMDL based load allocations. In some cases an adaptive management approach is used. While these approaches vary nation wide, their implications is often to move to very low nutrient concentrations.A study of 22 full scale wastewater treatment plants forms the basis for assessing the reliability and variability of nutrient removal plants achieving stringent limits. The results using technology performance statistics show that the averaging period for meeting discharge limits plays a key role in the ability of a plant to meet permit. The performance statistics also indicate the ideal performance that can be expected. Combining this information with nutrient speciation studies, the best achievable performance for nutrient removal can be identified for a specific technology.Additional facilities and resources are needed to meet increasingly stringent nutrient discharge requirements. The sustainability impacts of the additional treatment is presented in terms of the greenhouse gas (GHG) emissions from operation of the facilities, as required for discharge limits ranging from secondary treatment to limits below conventional treatment capability (requiring reverse osmosis). The evaluation of benefits associated with reduced algal growth potential and increasing GHG emissions, shows that the cost benefit ratio change significantly when the nutrient limits are reduced below < 3 mg N /L total nitrogen and < 0.1 mg P/L total phosphorus. Alternative nutrient management and control strategies could be considered for these lower limits.

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Section: Nitrogen Concentration Mg N/lmentioning

confidence: 96%

WERF Nutrient Challenge – Nutrient Regulations, Treatment Performance, and Sustainability Collide

Neethling¹,

Falk²,

Reardon³

et al. 2011

proc water environ fed

Self Cite

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“…In addition, the pilot units were operated at constant influent flow rates and under favorable environmental conditions. (Benisch et al, 2007) Based on the results of the 2006 pilot study and the need to better understand these tertiary technologies, the City decided to conduct a two year demonstration study to gain essential knowledge regarding full scale performance of these low phosphorus systems. The new pilot study would be conducted with variable flow rates, some automated controls and online measurements, and operated by plant staff.…”

Section: Introduction Backgroundmentioning

confidence: 99%

Achieve Nitrification and Ultra-Low Phosphorus using Tertiary Membrane Filtration

Bill¹,

Falconer²,

Benisch³

et al. 2012

proc water environ fed

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Increasingly stringent nutrient limits on wastewater treatment plant discharge are requiring a better understanding of treatment technologies for phosphorus and nitrogen removal. The City of Coeur d'Alene Wastewater Treatment Plant's initial interest in a tertiary membrane filtration (TMF) process was to meet ultra-low effluent total phosphorus (TP) concentrations of less than 0.050 mg/L TP. The City decided to conduct a two-year demonstration pilot program to determine additional valuable information (i.e. phosphorus removal reliability, design parameters, operating strategies, etc.) about the TMF system. Results show that the TMF system produced effluent quality of less than 0.050 mg/L TP on a monthly average basis. While operating with a solids inventory of approximately 2,000 mg/L TSS, the TMF system was also nitrified, reducing ammonia levels to less than 3.0 mg/L NH 4 -N on a monthly average basis.

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The relationship between operational and bioavailable phosphorus fractions in effluents from advanced nutrient removal systems

Brett

2015

Int. J. Environ. Sci. Technol.

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Because different phosphorus (P) forms vary greatly in their bioavailability, total phosphorus concentrations are a problematic predictor of the eutrophication potential of natural surface waters and wastewater treatment facility effluents. It is currently not known which operational P characterizations (i.e., dissolved/particulate and reactive/non-reactive) best predict effluent P bioavailability. We characterized the P speciation and directly measured the bioavailability of P (BAP) using algal bioassays for 14 full-scale advanced nutrient removal wastewater treatment plants representing a wide range of P removal technologies. A strong statistical relationship was observed between the effluent total BAP (tBAP) and total reactive P (TRP) (r 2 & 0.81), with a tBAP/TRP ratio of 0.61 ± 0.24, indicating that TRP can be used as a conservative surrogate predictor of tBAP. A comparison of different operational categories for phosphorus indicated that sBAP is consistently lower than both soluble P (SP) and soluble reactive P (SRP) with average ratios of 0.34 ± 0.19 and 0.62 ± 0.27, respectively. This shows a large fraction of the dissolved non-reactive P (i.e., SP-SRP), and C40 % of the P classified as SRP was not bioavailable. Total BAP concentrations were on average 30 % higher than soluble BAP (sBAP) concentrations, indicating that the particulate P fraction was an important component of the BAP for the tested effluents. Comparisons between different P removal technologies suggest the bioavailability, and P species composition varies with the nutrient removal process, and that in many cases, a large portion ([60 %) of the effluent P is recalcitrant to algal growth.

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Can Tertiary Phosphorus Removal Reliably Produce 10 7mu;g/L? Pilot Results from Coeur D'Alene, ID

Cited by 4 publications

References 0 publications

WERF Nutrient Challenge – Nutrient Regulations, Treatment Performance, and Sustainability Collide

WERF Nutrient Challenge – Nutrient Regulations, Treatment Performance, and Sustainability Collide

Achieve Nitrification and Ultra-Low Phosphorus using Tertiary Membrane Filtration

The relationship between operational and bioavailable phosphorus fractions in effluents from advanced nutrient removal systems

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