Study on Anaerobic Digestion of Oxytetracycline Residue Enhanced by Modified Biochar
LI Jing
ZHONG Weizhang
NING Zhifang
NIU Jianrui
HAN Yonghui
MA Caiyun
Abstract：In order to explore the enhancement effect of biochar on anaerobic digestion,oxytetracycline residue was used as the substrate for anaerobic digestion,and biochar was added to solve the problems of low efficiency and weak stability of tradi-tional anaerobic digestion.The strengthening effects of biochar and zero-valent iron modified biochar were illustrated by the changes of gas production,stability and microbial community.The results show that adding biochar alone and nano-scale zero-valent iron modified biochar can reduce the concentration of ammonia nitrogen in the system,reduce the influence of am-monia inhibition on anaerobic digestion,promote the transformation and consumption of VFAs,and improve the stability of the system.The gas production efficiency increased by 20.74%and 15.49%respectively,reaching above 115.20 mL/g.In addi-tion,biochar can also strengthen the removal of residual oxytetracycline,and its removal efficiency is increased by 2.37%and 4.82%respectively compared with the control group,and the content of residual oxytetracycline in the final system can be reduced to below 10 mg/L.After adding zero-valent iron to biochar,the abundance of acid-producing bacteria and methano-genic archaea increased in different degrees,thus strengthening the process of anaerobic digestion and methanogenesis.
Keywords：biocharzero valent ironoxytetracycline residuestrengtheninganaerobic digestion
Publication Date：2023-12-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 109-116 )