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Published on: March 22, 2024
The adsorption mechanisms of algae-bacteria symbiotic system and its fast formation process
Lixin Li1, Wanmeng Liu1, Taojie Liang2
1School of Environmental and Chemical Engineering, Heilongjiang University of Science and Technology, Harbin 150022, People's Republic of China; State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150080, People's Republic of China.
Abstract:
The formation process of the algae-bacteria symbiotic system (ABSS) was analyzed, and the formation adsorption conditions were optimized. The role of extracellular polymeric substances (EPS), specific surface area and zeta potential in adsorption mechanisms were assessed and proposed. The results showed the dry weight of the ABSS and adsorption efficiency of microalgae reached the highest under the conditions of 25 °C, pH 6.0, 160 rpm and CaCl2 2.0 mg/mL. The process of the ABSS formation could be mainly divided into the fast stage and slow stage. The roles of EPS, specific surface area and zeta potential accounted for 84.22%, 5.17% and 10.61% of the adsorption capacity, respectively. EPS dominated the formation of the ABSS. The results indicated that mycelial pellets were biosorption materials and had the characteristics of chemical materials.
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