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Pharmaceuticals effect and removal, at environmentally relevant concentrations, from sewage sludge during anaerobic digestion.

Abstract：

: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-1 d-1 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.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Alenzi A,Hunter C,Spencer J,Roberts J,Craft J,Pahl O,Escudero A

doi

10.1016/j.biortech.2020.124102

subject

Has Abstract

pub_date

2021-01-01 00:00:00

pages

124102

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(20)31375-4

journal_volume

319

pub_type

杂志文章

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