Effects of iron and carbon fiber artificial aquatic mat on microbial membrane hanging in polluted rivers and lakes.

In order to solve the problems of low surface energy, long microbial attachment time and slow start of membrane hanging in the process of enhanced water purification, an iron carbon fiber-CF artificial water mat was constructed by combining waste iron and carbon fiber water mat. The heavily polluted surface water was used as raw water. Under the condition of stage aeration, the experiment of enhanced membrane hanging was carried out. The results showed that compared with carbon fiber artificial aquatic mat, the adhesion performance of biofilm on iron carbon fiber artificial aquatic mat was significantly improved, the hanging rate of biofilm increased from 125.1% to 133.0%, and the size of biofilm cluster structure was significantly larger. The polysaccharide, protein and protein-to-polysaccharide ratio in the extracellular polymer of biofilm changed from 53,11 mg/gVSS and 1.33 to 39, 106 mg/gVSS and 2.71 at the end of the initiation period (21 d), respectively. The enrichment and screening of Pseudomonas bacteria by iron-carbon materials improved the movement ability of bacteria and promoted the secretion of extracellular polymers by bacteria. In addition' the highly expressed functional genes of microorganisms were highly expressed in ICF, which improved the adhesion performance of microorganisms on the surface of iron-carbon fiber materials. [ABSTRACT FROM AUTHOR]