Reed Biochar Addition to Composite Filler Enhances Nitrogen Removal from BDBR Systems in Eutrophic Rivers Channel

With the rapid development of urbanization in China, eutrophication or black stink urban rivers has become a critical environmental problem. As research hotspot wastewater purification, biofilm technology shortcomings, such as insufficient carbon sources for denitrification. This study used Biofilm Denitrification Batch Reactor (BDBR) system constructed using reed biochar source required denitrification, significantly accelerating formation. To determine suitable amount water purification from eutrophic by BDBR system, 0%, 5%, 10%, and 15% was added to viscose fiber combined packing. The packing reactor involved this had high removal efficiency channel COD throughout experiment. However, adding 5% 10% filler effectively increased number nitrifying denitrifying bacteria on biofilm, improved dominant diversity microbial activity, enhanced denitrification system. It provides new ideas methods developing applying situ polluted rivers.