化工环保2025，Vol.45Issue(5)：667-673,7.DOI:10.3969/j.issn.1006-1878.2025.05.010
有机负荷对UASB处理土霉素生产废水效能及微生物群落的影响
Effect of organic loading on UASB performance and microbial community in treating oxytetracycline production wastewater
摘要
Abstract
Through a 163 d continuous experiment treating oxytetracycline production wastewater in an up-flow anaerobic sludge blanket(UASB)reactor,this study investigated the treatment performance and microbial community dynamics under different organic loading rates(OLR).The results show that the mesophilic UASB reactor can maintain stable operation at OLR of 1-4 kg/(m3·d),achieving a COD removal efficiency of 60.1%.When the OLR increases to 5 kg/(m3·d),the COD removal efficiency sharply decreases to 30.2%,accompanied by reactor acidification and destabilization.Throughout the operation,carbohydrate degradation remains stable across OLR without significant accumulation,whereas protein removal efficiency is higher at lower OLR but decreases to 66.3%under high OLR.In the bacterial community,the phylum Firmicutes dominates carbohydrate degradation with a relative abundance of 49.40%,maintaining carbohydrate removal rates exceeding 86%even under high OLR.Within the archaeal community,increasing OLR promotes a shift in the methanogenic pathway from hydrogenotrophic to acetoclastic methanogenesis.However,excessively high OLR lead to a decline in the abundance of Methanosaeta to 25.40%.关键词
制药废水/厌氧生物降解/厌氧产甲烷代谢/UASB/土霉素Key words
pharmaceutical wastewater/anaerobic biodegradation/anaerobic methanogenic metabolism/UASB/oxytetracycline分类
环境科学引用本文复制引用
田野,王运,田哲,宋逸飞,李翔晨,曹宗仑,孙杰..有机负荷对UASB处理土霉素生产废水效能及微生物群落的影响[J].化工环保,2025,45(5):667-673,7.基金项目
中国石油化工股份有限公司项目(325060). （325060）
