Response surface optimization of anaerobic self-forming dynamic membrane (AnSFDM) formation: Dominant parameter, interaction relationship and experimental evidence
Year: 2025
Type: article
Abstract: Anaerobic self-forming dynamic membrane (AnSFDM) bioreactors have attracted increasing attention owing to their cost-effectiveness and lower carbon footprint. AnSFDM formation is the initial process of their operation and of pivotal importance for determining the basic characteristics of AnSFDMs. Nevertheless, the effect of operational parameters on the AnSFDM formation process has not been studied in a systematical and quantitative manner. In this study, response surface methodology was for the first time, applied to elucidate the effect of mixed liquor suspended solids concentration, stirring speed and flux as well as their interactions on the characteristics of newly formed AnSFDMs, i.e., formation time, filtration resistance and fouling propensity. Response surface methodology analysis quantified the effect degree regarding different operational parameters and evaluated interaction effects. At higher flux and mixed liquor suspended solids concentration, the formation time of AnSFDMs shortened while their filtration resistance and fouling propensity increased. As stirring speed increased, the formation time of AnSFDMs increased while their filtration resistance and fouling propensity decreased first (200–250 rpm) and then increased (250–300 rpm). Experimental evidence showed that the operational parameters affecting AnSFDM formation primarily via modifying particle size and extracellular polymeric substances content. The optimal values of mixed liquor suspended solids concentration, stirring speed and flux turned out to be 4126 mg/L, 236 rpm and 154 L/(m 2 ∙h), respectively, corresponding to the formation time, filtration resistance and fouling propensity values of 82.47 min, 1.50 × 10 9 m −1 and 1.48 × 10 8 m −1 min −1 , respectively.
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Funders: Department of Science and Technology of Shandong Province, National Natural Science Foundation of China, Natural Science Foundation of Shandong Province, Key Technology Research and Development Program of Shandong, Fundamental Research Fund of Shandong University, National Key Research and Development Program of China
OpenAlex ID: W4414016068