Colloids, flocculation and carbon capture - a comprehensive plant-wide model

Water Science and Technology : a Journal of the International Association on Water Pollution Research
Hélène HauducImre Takács

Abstract

The implementation of carbon capture technologies such as high-rate activated sludge (HRAS) systems are gaining interests in water resource and recovery facilities (WRRFs) to minimize carbon oxidation and maximize organic carbon recovery and methane potential through biosorption of biodegradable organics into the biomass. Existing activated sludge models were developed to describe chemical oxygen demand (COD) removal in activated sludge systems operating at long solids retention times (SRT) (i.e. 3 days or longer) and fail to simulate the biological reactions at low SRT systems. A new model is developed to describe colloidal material removal and extracellular polymeric substance (EPS) generation, flocculation, and intracellular storage with the objective of extending the range of whole plant models to very short SRT systems. In this study, the model is tested against A-stage (adsorption) pilot reactor performance data and proved to match the COD and colloids removal at low SRT. The model was also tested on longer SRT systems where effluents do not contain much residual colloids, and digestion where colloids from decay processes are present.

References

Apr 11, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Thomas NogajBernhard Wett

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Citations

Mar 1, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Mathieu SpérandioLeiv Rieger
Nov 12, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Shashank SrivastavaAkhilendra Bhushan Gupta

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