Development, implementation, and validation of a generic nutrient recovery model (NRM) library

Vaneeckhaute, Céline; Claeys, Filip A.H.; Meers, Erik; Belia, Evangelia; Vanrolleghem, Peter

doi:10.1016/j.envsoft.2017.09.002

Cited by 45 publications

(28 citation statements)

References 65 publications

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“…Note that equilibrium with finely-grained hydroxyapatite with a solubility product of 10 −46 resulted in a realistic o-PO 4 concentrations between 0.1 mg/L and 10 mg P/L for pH between 7.5 and 9.0. The bulk hydroxyapatite solubility product (e.g., 10 −57 according to [3]) is commonly considered as in a recent wastewater modeling study [32], but instead results in equilibrated o-PO 4 concentrations that are much lower, while supersaturation with bulk hydroxyapatite is observed in slag filters [23] or biological reactors [33].…”

Section: Phosphorus Removal Mechanisms In the Septic Tankmentioning

confidence: 99%

Phosphorus Removal and Carbon Dioxide Capture in a Pilot Conventional Septic System Upgraded with a Sidestream Steel Slag Filter

Claveau-Mallet

Seltani

Comeau

2020

Water

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The objective of this work was to demonstrate the removal of the phosphorus and carbon dioxide capture potential of a conventional septic system upgraded with a sidestream steel slag filter used in recirculation mode. A pilot scale sidestream experiment was conducted with two septic tank and drainfield systems, one with and one without a sidestream slag filter. The experimental system was fed with real domestic wastewater. Recirculation ratios of 25%, 50% and 75% were tested. Limestone soils and non-calcareous soils were used as drainfield media. The tested system achieved a satisfactory compromise between phosphorus removal and pH at the effluent of the septic tank, thus eliminating the need for a neutralization step. The phosphorus removal efficiency observed in the second compartment of the septic tank was 30% in the slag filter upgraded system, compared to −3% in the control system. The slag filter reached a phosphorus retention of 105 mg/kg. The drainfield of non-calcareous soils achieved very high phosphorus removal in both control and upgraded systems. In the drainfield of limestone soil, the slag filtration reduced the groundwater phosphorus contamination load by up to 75%. The removal of chemical oxygen demand of the drainfields was not affected by the pH rise induced by the slag filter. Phosphorus removal in the septic tank with a slag filter was attributed to either sorption on newly precipitated calcium carbonate, or the precipitation of phosphate minerals, or both. Recirculation ratio design criteria were proposed based on simulations. Simulations showed that the steel slag filter partly inhibited the biological production of carbon dioxide in the septic tank. The influent alkalinity strongly influenced the recirculation ratio needed to raise the pH in the septic tank. The recirculation mode allowed clogging mitigation compared to a mainstream configuration, because an important part of chemical precipitation occurred in the septic tank. The control septic tank produced carbon dioxide, whereas the slag filter-upgraded septic tank was a carbon dioxide sink.

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Section: Phosphorus Removal Mechanisms In the Septic Tankmentioning

confidence: 99%

Phosphorus Removal and Carbon Dioxide Capture in a Pilot Conventional Septic System Upgraded with a Sidestream Steel Slag Filter

Claveau-Mallet

Seltani

Comeau

2020

Water

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“…Concerning ammonia stripping, Vaneeckhaute et al (2018) recently published a generic nutrient recovery model (NRM) library that is mainly coded in Modelica and based on detailed chemical solution speciation and reaction kinetics for nitrogen recovery.…”

Section: /Ecp19157375mentioning

confidence: 99%

Modelica Modelling of an Ammonia Stripper

Redford

Faria

Saut

et al. 2019

Linköping Electronic Conference Proceedings

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This work presents a Modelica model for an ammonia stripper that is used to process waste (digestate) from a biogas production unit. The model includes the chemical balance equations between species in the liquid and gas, and includes the exchanges between both phases and the energy consumption of the unit. Results show the expected behaviour with an increasing pH with time, with further validation and calibration being necessary once experimental results are available. This is a novel use of Modelica designed to expand the library of processes that are simulated using this approach.

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“…Vaneeckhaute et al 27 recently developed a generic nutrient recovery model (NRM) library, including advanced mathematical process models for the most established nutrient recovery technologies available to date, i.e., N stripping/absorption, struvite precipitation/crystallisation, as well as anaerobic digestion for nutrient release. The models are based on a unique physicochemical modelling framework, combining detailed chemical solution speciation as well as biochemical and physicochemical reaction kinetics.…”

Section: Quality By Design: What Is It?mentioning

confidence: 99%

Towards Quality by Design and process analytical technology for enhanced nutrient recovery from wastewaters

Vaneeckhaute

2019

npj Clean Water

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Recovering nutrients from wastewater as sustainable bio-based products provides a key solution to major environmental problems. Classical technology development approaches for resource recovery largely ignore the real-world variability in raw waste materials, which currently hinders the successful implementation of recovery strategies. A major challenge is to create a consistent and environmentally friendly supply of high-quality end-products that can compete with fossil-derived products currently on the market. This paper suggests the use of a Quality by Design approach as adapted from the pharmaceutical industry to ensure a high standard of quality consistency. Key elements of this approach involve mathematical models and integrated design-control strategies that support the production of high-quality marketable end-products from variable input waste and wastewater streams. Further research in terms of cost evaluation and optimisation of such approach for resource recovery applications is needed. A regulatory framework for Process Analytical Technology implementation in the field is also suggested.npj Clean Water (2019) 2:14 ; https://doi.

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Development, implementation, and validation of a generic nutrient recovery model (NRM) library

Cited by 45 publications

References 65 publications

Phosphorus Removal and Carbon Dioxide Capture in a Pilot Conventional Septic System Upgraded with a Sidestream Steel Slag Filter

Phosphorus Removal and Carbon Dioxide Capture in a Pilot Conventional Septic System Upgraded with a Sidestream Steel Slag Filter

Modelica Modelling of an Ammonia Stripper

Towards Quality by Design and process analytical technology for enhanced nutrient recovery from wastewaters

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