摘要
       本研究采用磺胺甲恶唑（SMX）考察了其对丝状菌好氧颗粒污泥处理过程的影响。FAGS表现出了很强的耐受能力。连续流反应器（CFR）中的FAGS在长期运行过程中加入2μg/L的SMX可以保持稳定。NH4+、化学需氧量（COD）和SMX的去除率分别保持在80%、85%和80%以上。吸附和生物降解对FAGS去除SMX具有重要作用。胞外聚合物（EPS）可能在SMX的去除和FAGS对SMX的耐受性中发挥重要作用。添加SMX后，EPS含量从157.84 mg/g VSS增加到328.22 mg/g VSS。SMX对微生物群落有轻微影响。FAGS的高丰度红细菌、双生细菌和鞘氨醇菌可能与SMX呈正相关。SMX的添加导致FAGS中四个磺酰胺抗性基因的丰度增加。
Abstract
In this study, sulfamethoxazole (SMX) was employed to investigate its impact on the process of aerobic granule sludge with filamentous bacteria (FAGS). FAGS has shown great tolerance ability. FAGS in a continuous flow reactor (CFR) could keep stable with 2 μg/L of SMX addition during long-term operation. The NH4+, chemical oxygen demand (COD), and SMX removal efficiencies kept higher than 80%, 85%, and 80%, respectively. Both adsorption and biodegradation play important roles in SMX removal for FAGS. The extracellular polymeric substances (EPS) might play important role in SMX removal and FAGS tolerance to SMX. The EPS content increased from 157.84 mg/g VSS to 328.22 mg/g VSS with SMX addition. SMX has slightly affected on microorganism community. A high abundance of Rhodobacter, Gemmobacter, and Sphaerotilus of FAGS may positively correlate to SMX. The SMX addition has led to the increase in the abundance of the four sulfonamide resistance genes in FAGS.

https://www.sciencedirect.com/science/article/abs/pii/S0960852423002493