Fig S A shows the surface structure of the

3.3. Microbial Adrucil of biofilm during different stages
Fig. 5. Relative abundance of the main phylum identified in PBS biofilm samples.Figure optionsDownload full-size imageDownload as PowerPoint slide
3.4. Future research prospect
This study demonstrated that PBS could act as denitrification carbon source for RAS wastewater treatment. The existence of salinity (25‰) could improve the efficiency and stability of the system, which makes it possible for valuable marine species farming. However, how to control the DOC release and utilization and avoid sulfate reduction and DNRA electron competition with denitrification is crucial of this kind of polymers denitrification. Based on the organic carbon release regulation, potential solutions include cell to cell communication which could elucidate the mechanism of carbon metabolism pathways. Besides, blending PBS with cellulose materials such as bamboo powder is also feasible to slow the degradation of packing. Based on DOC utilization, avoiding nitrate exhaust in one circulation and increasing ORP by DO might be beneficial to reduce effluent DOC accumulation.