Comprehensive Process Design by Integration of Versatile Refined Stoichiometric Model With “Plug-In” Kinetic Modules

Wable, Milind V.

doi:10.2175/193864700784607163

Cited by 4 publications

(2 citation statements)

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“…A whole plant simulator uses other models for individual processes and then integrates them to account for all the interrelated effects. This approach was described in papers by Johnson et al (2002), Filipe et al (2001), and Wable (2000) and allows considerable flexibility in the modeling of a facility. The biological treatment model in Pro2D provides a full implementation of the ASM No.…”

Section: Methodsmentioning

confidence: 99%

An Evaluation of Six Different Methods for Improving Phosphorus Removal at Wastewater Treatment Facilities

Johnson¹,

Kresge²

2003

proc water environ fed

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The City of Boise's West Boise wastewater treatment facility (WWTF) is in the process of upgrading its treatment train in order to reduce its discharge of phosphorus. This work is a part of a larger effort by the City of Boise to meet upcoming total maximum daily load-(TMDL) based limitations on the discharge of phosphorus into the Boise and Snake Rivers. As part of this effort, a whole plant simulator was developed for the West Boise WWTF. The simulator was used to determine the benefits and effects of different treatment options, and combinations thereof, on the plant effluent phosphorus levels. The processes investigated are: 1) Enhanced Primary Treatment, 2) Metal salt addition to secondary clarifier influent, 3) Biological phosphorus removal, 4) Primary sludge fermentation, 5) Metal salt addition to the dewatering recycles stream, and 6) Intentional struvite formation within the dewatering recycles stream.The West Boise WWTF influent contains inadequate volatile fatty acids (VFAs) and biological oxygen demand (BOD) to allow full biological removal of the bioreactor influent ortho-phosphate. This problem is compounded since the West Boise WWTF must treat the anaerobically digested biosolids from the other major facility in the City of Boise, which almost doubles the phosphorus load to the West Boise WWTF (by way of the dewatering recycles stream) without any additional BOD load to help remove the additional phosphorus.The modeling effort indicates that there is no single technology that can cost-effectively meet the City's effluent phosphorus goals. It was found that metal salt (alum or iron) addition will probably be required in order to reduce the plant effluent to the target ortho-phosphate level of 0.5 mg P/l. The alum dosage point that resulted in the lowest overall use of alum was in the dewatering feed stream. This is a direct result of adding the alum to a high-strength phosphate stream and getting the most efficient usage out of the metal. In all cases, primary sludge fermentation reduced either the effluent ortho-phosphate level and/or the required alum dosage to meet the effluent target.The combination of alum addition in the primary clarifier (chemically enhanced primary treatment, [CEPT]) and primary sludge fermentation appeared to have a number of advantages. This process required only about 9 percent more chemical, but reduced plant air requirements by 13 percent and the mixed liquor suspended solids (MLSS) by about 25 percent. These latter two effects directly translate to more plant capacity.

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Section: Methodsmentioning

confidence: 99%

An Evaluation of Six Different Methods for Improving Phosphorus Removal at Wastewater Treatment Facilities

Johnson¹,

Kresge²

2003

proc water environ fed

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“…A whole-plant mass balance is developed for all of the unit processes included in the simulator. The development and format of the Pro2D whole-plant process simulator is well documented , Wable, 2000, Filipe et al, 2001, Johnson et al, 2002.…”

Section: Pro2d Whole-plant Process Simulatormentioning

confidence: 99%

Incorporation of an Intentional Struvite Precipitation Model into a Whole-plant Process Simulator

Leaf¹,

Johnson²

2009

proc water environ fed

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An intentional struvite precipitation model is incorporated into a whole-plant process simulator allowing for the quantification of impacts to the overall mass balance and associated phosphorus recovery from a wastewater treatment system. The intentional struvite precipitation model predicts the overall struvite quantities generated (as magnesium ammonium phosphate, MgNH 4 PO 4 (H 2 O) 6 ) and the associated reduction of phosphorus and ammonia across the reactor. The results are incorporated into the overall wastewater treatment facility (WWTF) mass balance, quantifying the impact intentional struvite precipitation has on the nutrient removal performance of the facility. The use of this model in a whole-plant process simulator allows the direct comparison to other nutrient removal alternatives, providing a basis for the selection of the appropriate treatment process configuration.

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Metabolic labeling of human cells with tritiated nucleosides results in activation of the ATM-dependent p53 signaling pathway and acceleration of DNA repair

et al. 2003

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Comprehensive Process Design by Integration of Versatile Refined Stoichiometric Model With “Plug-In” Kinetic Modules

Cited by 4 publications

References 0 publications

An Evaluation of Six Different Methods for Improving Phosphorus Removal at Wastewater Treatment Facilities

An Evaluation of Six Different Methods for Improving Phosphorus Removal at Wastewater Treatment Facilities

Incorporation of an Intentional Struvite Precipitation Model into a Whole-plant Process Simulator

Metabolic labeling of human cells with tritiated nucleosides results in activation of the ATM-dependent p53 signaling pathway and acceleration of DNA repair

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