A mechanistic model for anaerobic phototrophs in domestic wastewater applications: Photo-anaerobic model (PAnM). (1st June 2017)

• Record Type: Journal Article
• Authors: Puyol, D.; Barry, E.M.; Hülsen, T.; Batstone, D.J.
• Is Part Of: Water research. Volume 116(2017)
• Page Start: 241
• Page End: 253
• Publication Date: 2017-06-01
• Subjects: Phototrophic bacteria -- Resource recovery -- Mechanistic modelling -- Partition-release-recovery; Water -- Pollution -- Research -- Periodicals; 363.7394
• DOI: 10.1016/j.watres.2017.03.022
• Languages: English
• ISSNs: 0043-1354

Abstract

Abstract: Purple phototrophic bacteria (PPB) have been recently proposed as a key potential mechanism for accumulative biotechnologies for wastewater treatment with total nutrient recovery, low greenhouse gas emissions, and a neutral to positive energy balance. Purple phototrophic bacteria have a complex metabolism which can be regulated for process control and optimization. Since microbial processes governing PPB metabolism differ from traditional processes used for wastewater treatment (e.g., aerobic and anaerobic functional groups in ASM and ADM1), a model basis has to be developed to be used as a framework for further detailed modelling under specific situations. This work presents a mixed population phototrophic model for domestic wastewater treatment in anaerobic conditions. The model includes photoheterotrophy, which is divided into acetate consumption and other organics consumption, chemoheterotrophy (including simplified fermentation and anaerobic oxidation) and photoautotrophy (using hydrogen as an electron donor), as microbial processes, as well as hydrolysis and biomass decay as biochemical processes, and is single-biomass based. The main processes have been evaluated through targeted batch experiments, and the key kinetic and stoichiometric parameters have been determined. The process was assessed by analyzing a continuous reactor simulation scenario within a long-term wastewater treatment system in a photo-anaerobic membrane bioreactor. Graphical abstract: Highlights: A mechanistic model for anaerobic phototrophs has been developed: PAnM. The model includes organic C and H2 (as COD) and inorganic C, N and P. Microbial processes based on PPB metabolism were identified through dedicated experiments. Kinetic and stoichiometric parameters were determined in batch tests. Model was tested by simulating the process in a photo-anaerobic MBR.