Foam fractionation for effective removal of Pseudomonas aeruginosa from water body: Strengthening foam drainage by artificially inducing foam evolution.

摘要: Abstract Lack of microbial contamination is great significance to drinking water safety and reclamation. In this work, foam fractionation was employed remove Pseudomonas aeruginosa (P. aeruginosa) from aqueous solution dodecyl dimethyl betaine (BS12) used as the collector. Since attachment strain cells on bubble surface would impede reflux interstitial liquid in plateau borders (PBs), a novel strategy strengthening drainage developed through artificially inducing evolution. Two gas distributors with different pore diameters had been mounted at bottom column for regulating radial distribution size phase. Experimental results indicated that diffuse coarsening could be significantly promoted by increasing difference among adjacent bubbles. Bubble coalescence contributed broadening width borders, thereby avoiding blockage cells. During coalescence, surfactant molecules partially shifted small towards large due molecule density difference. The increase excess gas-liquid interface conducive improving stability. Under suitable conditions air flow rates distributor 0.125 mm diameter 75 mL/min 0.425 mm 125 mL/min, BS12 concentration 0.1 g/L, P. 2.0 × 104 CFU/mL, removal percentage enrichment ratio were 99.6% 10.6, respectively. This work expected provide some new light presence solid particles facilitate industrialization treatment.