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- W2564432429 abstract "The precipitation and accumulation of struvite (MgNH4PO4·6H2O) within anaerobic processes has been a costly problem for wastewater facilities. To anticipate and mitigate struvite buildup, solubility models have been developed that employ equilibria software for the evaluation of equilibrium equations. Unfortunately, these programs run under the assumption that chemical equilibrium constants are single, universally accepted values when, in reality, a wide range of values have been published for these constants. In this study, a struvite solubility model was developed in which the equilibrium constants were treated as empirically distributed variables within a Monte Carlo simulation to understand the effect of uncertainty on precipitation potential over a range of pH (6–8.5), temperature (0–60 °C), and ionic strength (0–1 M). Using field conditions measured at a struvite-afflicted treatment plant as model input parameters, the resulting uncertainty in the struvite supersaturation ratio was found to be highly consequential, with the 90 percent confidence interval spanning well over an order of magnitude. Additionally, a sensitivity analysis was performed on the model, identifying the third orthophosphate equilibrium constant and the struvite solubility product as the most significant source of uncertainty." @default.
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- W2564432429 date "2017-04-01" @default.
- W2564432429 modified "2023-09-24" @default.
- W2564432429 title "A probabilistic approach to modeling struvite precipitation with uncertain equilibrium parameters" @default.
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- W2564432429 doi "https://doi.org/10.1016/j.ces.2016.12.026" @default.
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