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Investigating the biomass-specific inhibitory effect of benzalkonium chloride on anaerobic granules: A kinetic approach
- Source :
- Water Resources and Industry, Vol 31, Iss , Pp 100237- (2024)
- Publication Year :
- 2024
- Publisher :
- Elsevier, 2024.
-
Abstract
- Benzalkonium Chloride (BAC), a quaternary ammonium compound commonly used in industrial disinfection processes, was studied for its biomass-specific inhibitory effect on the specific methanogenic activity (SMA) of anaerobic granules. Inhibition batch assays were conducted with varying BAC concentrations (5–40 mg/L), resulting in biomass-dependent inhibition. Considering its surface-active nature, a biomass-specific BAC load was a suitable parameter to determine IC50 values, ranging from 4.3 to 6.1 mg BAC/g VS. For predicting the corresponding biomass-specific inhibition constant in ADM1, the inclusion of an additional adsorption-inhibition term was required for a better validation of results. The model yielded a biomass-specific IC50 of 5.3 mg BAC/g VS. The results encourage a change in perspective on IC50 for surfactants by determining a biomass-specific IC50, particularly in scenarios when surfactants accumulate within anaerobic reactors. Hereby, the reliability and practical relevance of IC50 is increased, driving the development of mitigation strategies.
Details
- Language :
- English
- ISSN :
- 22123717
- Volume :
- 31
- Issue :
- 100237-
- Database :
- Directory of Open Access Journals
- Journal :
- Water Resources and Industry
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.411cc56584141d1ae0ef282bd28f41f
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.wri.2023.100237