Wastewater treatment modelling in practice: a collaborative discussion of the state of the art

Phillips, Heather; Sahlstedt, Kristian; Frank, Kevin; Bratby, John; Brennan, W.J.; Rogowski, S.; Pier, Dave; Anderson, W; Mulas, Michela; Copp, John B.; Shirodkar, Nick

doi:10.2166/wst.2009.591

Cited by 26 publications

(9 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chemical doses, blower demands and other operating costs were developed using the plant-wide dynamic GPS-X model (Hydromantis, Version 5.0) shown on Figure 2. This model has been used by the Metro District's planning department and operations staff for the past 4 years, and has been calibrated and validated with plant data and special sampling efforts (Phillips et al, 2009;Phillips et al, 2010).…”

Section: Cost Opinionsmentioning

confidence: 99%

Cost and Greenhouse Gas Emissions for a 220 mgd Facility to Attain 2 mg/L TN and 0.16 mg/L TP

Biggs¹,

Paplow²,

Pier³

et al. 2011

proc water environ fed

View full text Add to dashboard Cite

The Colorado Department of Public Health and Environment (CDPHE) recently proposed longterm nutrient quality goals of 2.0 milligrams of nitrogen per liter (mg-N/L) for total nitrogen (TN) and 0.16 milligrams of phosphorus per liter (mg-P/L) for total phosphorus (TP) for warm water streams in Colorado. The proposed regulatory initiatives will be considered by the Colorado Water Quality Control Commission at an upcoming rule-making hearing. To support testimony that the Metro Wastewater Reclamation District (Metro District) will present at that hearing, a Nutrient Quality Impact Report was prepared to quantify the cost and greenhouse gas (GHG) emissions associated with upgrading the Robert W. Hite Treatment Facility (RWHTF) to provide four levels of TP and three levels of TN reduction. The costs and GHG emissions associated with treatment to 2 mg/L TN are disproportionately high. Even if economic costs are not considered, it can be argued the power and chemical consumption, and resulting GHG emissions, are excessive for the marginal benefits that may be gained, and could result in a negative net environmental impact.

show abstract

Section: Cost Opinionsmentioning

confidence: 99%

Cost and Greenhouse Gas Emissions for a 220 mgd Facility to Attain 2 mg/L TN and 0.16 mg/L TP

Biggs¹,

Paplow²,

Pier³

et al. 2011

proc water environ fed

View full text Add to dashboard Cite

show abstract

“…The original model calibration is described in a previous publication (Phillips et al, 2009b). Since then, the Facility has implemented a centrate management strategy to dampen the diurnal nitrogen fluctuations.…”

Section: Model Calibration and Validationsmentioning

confidence: 99%

A Comprehensive Model to Drive Down Costs in Denver

Phillips¹,

Kuosman²,

Shaw³

et al. 2009

proc water environ fed

View full text Add to dashboard Cite

Since 2008, the Robert W. Hite Treatment Facility in Denver, Colorado, has maintained compliance with a 7-day average nitrate plus nitrite (NO x N) limit of 8.68 mg/L, and with seasonal ammonia limits ranging from 9.7 to 15 mg/L. In 2015, the facility must comply with more stringent ammonia limits, requiring the District to replace its existing high purity oxygen facility with a second biological nutrient removal (BNR) facility as part of an $800 million capital improvements plan. With multiple construction activities underway, decisions have to be made whether to budget millions of dollars for temporary chemical addition. The District staff must also develop strategies and initiate operation of a new centrate treatment facility. To help operators face these new challenges and to minimize operating costs, the District invested over $1 million in a plant-wide dynamic model in which consultants and District staff collaboratively for design, operations and planning. This paper will discuss sampling, model calibration and validation efforts, model applications and lessons learned.

show abstract

“…In this respect, Choubert et al (2013) stated that based on combined expertise of modellers (Phillips et al 2009) and sensitivity analysis (Petersen et al 2002) profound effects of wastewater characterisation on modelling outputs have been shown:  Sludge production is influenced by the estimated inert particulate COD.  Oxygen demand is influenced by the estimated total biodegradable COD.…”

Section: Introductionmentioning

confidence: 99%

Population balance models: a useful complementary modelling framework for future WWTP modelling

Torfs

Ducoste

Vanrolleghem

et al. 2014

Water Science and Technology

View full text Add to dashboard Cite

Population balance models (PBMs) represent a powerful modelling framework for the description of the dynamics of properties that are characterised by distributions. This distribution of properties under transient conditions has been demonstrated in many chemical engineering applications. Modelling efforts of several current and future unit processes in wastewater treatment plants could potentially benefit from this framework, especially when distributed dynamics have a significant impact on the overall unit process performance. In these cases, current models that rely on average properties cannot sufficiently capture the true behaviour and even lead to completely wrong conclusions. Examples of distributed properties are bubble size, floc size, crystal size or granule size. In these cases, PBMs can be used to develop new knowledge that can be embedded in our current models to improve their predictive capability. Hence, PBMs should be regarded as a complementary modelling framework to biokinetic models. This paper provides an overview of current applications, future potential and limitations of PBMs in the field of wastewater treatment modelling, thereby looking over the fence to other scientific disciplines.

show abstract

Wastewater treatment modelling in practice: a collaborative discussion of the state of the art

Cited by 26 publications

References 12 publications

Cost and Greenhouse Gas Emissions for a 220 mgd Facility to Attain 2 mg/L TN and 0.16 mg/L TP

Cost and Greenhouse Gas Emissions for a 220 mgd Facility to Attain 2 mg/L TN and 0.16 mg/L TP

A Comprehensive Model to Drive Down Costs in Denver

Population balance models: a useful complementary modelling framework for future WWTP modelling

Contact Info

Product

Resources

About