Photodegradation and sorption govern tetracycline removal during wastewater treatment in algal ponds

被引：144

作者：

Norvill, Zane N. ^{[1
,2
]}

Toledo-Cervantes, Alma ^{[1
]}

Blanco, Saul ^{[3
]}

Shilton, Andy ^{[2
]}

Guieysse, Benoit ^{[2
]}

Munoz, Raul ^{[1
]}

机构：

[1] Univ Valladolid, Dept Chem Engn & Environm Technol, Dr Mergelina S-N, E-47011 Valladolid, Spain

[2] Massey Univ, Sch Engn & Adv Technol, Private Bag 11 222, Palmerston North 4442, New Zealand

[3] Inst Environm, La Serna 58, Leon 24007, Spain

来源：

BIORESOURCE TECHNOLOGY | 2017年 / 232卷

关键词：

Emerging pollutant; Microalgae; Raceway; Photolysis; Wastewater; TREATMENT PLANTS; PILOT-SCALE; BACTERIAL PHOTOBIOREACTORS; VETERINARY ANTIBIOTICS; LIQUID-CHROMATOGRAPHY; PIGGERY WASTEWATERS; NATURAL-WATERS; ENVIRONMENT; FATE; MICROALGAE;

D O I：

10.1016/j.biortech.2017.02.011

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The degradation of the antibiotic tetracycline, supplied at 100 mu g L (1) in domestic wastewater, was studied in an outdoor, pilot scale, high rate algal pond (HRAP). Effective operation was demonstrated with the biomass concentration and the chemical oxygen demand removal efficiency averaging 1.2 +/- 0.1 gTSS L (1) and 80 +/- 4%, respectively, across all operational periods. Tetracycline removal exceeded 93% and 99% when the HRAP was operated at hydraulic retention times of 4 and 7 days, respectively. Batch tests and pulse testing during HRAP operation repeatedly evidenced the significance of photodegradation as a removal mechanism. Sorption dominated tetracycline removal during the night, but accounted for less than 6% of the total pollutant removal based on sorbed tetracycline extracted from biomass. Overall, these results provide the first demonstration of efficient antibiotic removal, occurring mainly via indirect photodegradation, during relevant HRAP operation (low pollutant concentration, domestic wastewater and natural sunlight). (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：35 / 43

页数：9

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