Biological Nutrient Removal Model No. 2 (BNRM2): a general model for wastewater treatment plants

Abstract

IWA PublishingBarat Baviera, R.; Serralta Sevilla, J.; Ruano García, MV.; Jiménez Douglas, E.; Ribes Bertomeu, J.; Seco Torrecillas, A.; Ferrer, J. (2013) INTRODUCTIONWhole wastewater treatment plant modelling is one of the most important topics for the scientific community. This issue has been tackled by two philosophical approaches: using separated models (which were developed for the different process units) that are connected to simulate the whole plant, or using one unique and general model for the whole plant. In 2004, the CALAGUA research group published the Biological Nutrient Removal Model Nº 1 (BNRM1, Seco et al., 2004) including different physical, chemical and biological processes taking place in a WWTP. The physical processes included were: settling and clarification processes (flocculated settling, hindered settling and thickening), volatile fatty acids elutriation and gas-liquid transfer. The chemical interactions considered were acid-base processes, where equilibrium conditions are assumed. The biological processes included were: organic matter, nitrogen and phosphorus removal; acidogenesis, acetogenesis and methanogenesis. This model has been successfully applied for the design and optimization of numerous WWTPs (Ruano et al., 2010). However, these applications showed that nitrogen removal via nitrite and chemical precipitation processes should be considered to properly simulate WWTPs.

Environmental impact of submerged anaerobic MBR (SAnMBR) technology used to treat urban wastewater at different temperatures

“…The BVSS was calculated theoretically by the WWTP simulation software DESASS which features the mathematical model BNRM2 (Barat et al, 2012). The heavy metal content of the sludge in Spain proposed by Kidd et al (2007) was adopted in this study.…”

“…The three scenarios were studied using the new version of the WWTP simulation software DESASS (Ferrer et al, 2008) which features the mathematical model BNRM2 (Barat et al, 2012) and a general tool enabling the OEB of the different units in a WWTP to be calculated.…”

“…removed, etc). The functional unit (FU) adopted in this study was the volume of treated wastewater (m 3 ). This approach may have the advantage of being based on physical data.…”

Dynamic modelling of minerals precipitation in wastewater treatment

“…A reliable description of the movements and cycling of phosphorus and metal cations between the biological system, solid precipitates and the aqueous phase is thus very important, and requires a physico-chemistry platform across a plant-wide model and linked with parallel biological models. Over the past years, a number of modelling studies have been carried out in plant-wide settings, linking physicochemical frameworks with biological models (Barat et al 2013, Ikumi 2011, Lizarralde et al 2015. These studies have been successful at describing biological and physicochemical processes under dynamic conditions, and verifying model approaches using laboratory experiments.…”

“…In general, two main approaches have been used to develop plant-wide models. The first approach entails using one comprehensive model or "supermodel" to describe all the state variables and process expressions across the entire wastewater treatment plant (Barat et al 2013). The main advantage being to avoid mapping one model's output to another model's input.…”