AI Article Synopsis
- Anaerobic digestion can treat antibiotic-contaminated wastewaters, but its effectiveness varies based on the specific chemical characteristics of the compounds and operational conditions of the reactor.
- A mathematical model was created to represent 16 metabolic pathways for treating wastewater contaminated with sulfamethazine, using Contois kinetics to assess biomass concentration and its impact on bed porosity.
- The study evaluated two hypotheses for sulfamethazine degradation and found that effective removal was linked to the consumption of carbohydrates and proteins, while higher acetic acid production negatively affected degradation performance.
Article Abstract
Anaerobic digestion has been used to treat antibiotic-contaminated wastewaters. However, it is not always effective, since biodegradation is the main removal mechanism and depends on the compound chemical characteristics and on how microbial metabolic pathways are affected by the reactor operational conditions and hydrodynamic characteristics. The aim of this study was to develop a mathematical model to describe 16 metabolic pathways of an anaerobic process treating sulfamethazine-contaminated wastewater. Contois kinetics and a useful reaction volume term were used to represent the biomass concentration impact on bed porosity in a N continuously stirred tank modeling approach. Two sulfamethazine removal hypotheses were evaluated: an apparent enzymatic reaction and a cometabolic degradation. Additionally, long-term modeling was developed to describe how the operational conditions affected the performance of the process. The best degradation correlations were associated with the consumption of carbohydrates, proteins and it was inversely related to acetic acid production during acidogenesis.
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| http://dx.doi.org/10.1007/s10532-020-09914-x | DOI Listing |
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