發(fā)布者：抗性基因網(wǎng) 時間：2023-06-14 瀏覽量：568
摘要
? ? ? ?本研究采用磺胺甲惡唑（SMX）考察了其對絲狀菌好氧顆粒污泥處理過程的影響。FAGS表現(xiàn)出了很強(qiáng)的耐受能力。連續(xù)流反應(yīng)器（CFR）中的FAGS在長期運(yùn)行過程中加入2μg/L的SMX可以保持穩(wěn)定。NH4+、化學(xué)需氧量（COD）和SMX的去除率分別保持在80%、85%和80%以上。吸附和生物降解對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對SMX的耐受性中發(fā)揮重要作用。添加SMX后，EPS含量從157.84 mg/g VSS增加到328.22 mg/g VSS。SMX對微生物群落有輕微影響。FAGS的高豐度紅細(xì)菌、雙生細(xì)菌和鞘氨醇菌可能與SMX呈正相關(guān)。SMX的添加導(dǎo)致FAGS中四個磺酰胺抗性基因的豐度增加。
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