Glasgow Caledonian University, Glasgow, Scotland, UK; University of Tabuk, Tabuk, Saudi Arabia.
Glasgow Caledonian University, Glasgow, Scotland, UK.
Bioresour Technol. 2021 Jan;319:124102. doi: 10.1016/j.biortech.2020.124102. Epub 2020 Sep 16.
This paper investigates the performance of AD in the presence of high-risk pharmaceuticals found in sewage sludge and its removal capacity. The digestion process of synthetic sewage sludge was observed in two 7L glass reactors (D1 and D2) at 38 °C (OLR 1.3 gVS L d and HRT 43 d). Environmentally relevant pharmaceuticals (clarithromycin, clotrimazole, erythromycin, fluoxetine, ibuprofen, sertraline, simvastatin and tamoxifen) were added in D2 at predicted environmental (sludge) conditions. The results demonstrated that long-term presence of pharmaceuticals can affect AD and induce instability resulting in an accumulation of VFAs. This study showed a concurrent effect on AD microbial composition, increasing the percentage of Firmicutes (>70%) and decreasing the percentages of Bacteroidetes and Euryarchaeota (<5%), which seems to be the cause of VFA accumulation and resultant the decrease in the biogas production. However, it seems that anaerobic microorganisms offer enhanced removal of the antibiotics clarithromycin and erythromycin over aerobic techniques.
本文研究了 AD 在存在污水污泥中高风险药物的情况下的性能及其去除能力。在两个 7L 玻璃反应器（D1 和 D2）中以 38°C（OLR 1.3 gVS L d 和 HRT 43 d）观察合成污水污泥的消化过程。在 D2 中添加了环境相关药物（克拉霉素、克霉唑、红霉素、氟西汀、布洛芬、舍曲林、辛伐他汀和他莫昔芬），预测了环境（污泥）条件下的浓度。结果表明，药物的长期存在会影响 AD 并导致不稳定，从而导致 VFAs 的积累。本研究表明 AD 微生物组成的同时作用，增加了厚壁菌门（>70%）的百分比，降低了拟杆菌门和广古菌门（<5%）的百分比，这似乎是 VFA 积累的原因，也是沼气产量下降的原因。然而，似乎厌氧微生物对克拉霉素和红霉素等抗生素的去除效果优于好氧技术。
