Title

Impact of Chlortetracycline on Sequencing Batch Reactor Performance for Swine Manure Treatment

Document Type

Article

Publication Date

9-2011

Abstract

Treatment of aged (500 day, 4 °C stored) chlortetracycline (CTC; 0, 20, 40, 80 mg/L CTC)-amended swine manure using two cycle, 22 day stage anaerobic sequencing batch reactors (SBR) was assessed. Eighty milligrams per liter CTC treatment inhibited SBR treatment efficiencies, although total gas production was enhanced compared to the no-CTC treatment. The 20 and 40 mg/L CTC treatments resulted in either slight or no differences to SBR treatment efficiencies and microbial diversities compared to the no-CTC treatment, and were generally similar to no-CTC treatments upon completion of the first 22 day SBR cycle. All CTC treatments enhanced SBR gas generation, however CH4yields were lowest for the 80 mg/L CTC treatment (0.111 L CH4/g tCOD) upon completion of the second SBR react cycle. After a 22 day acclimation period, the 80 mg/L CTC treatment inhibited methanogenesis due to acetate accumulation, and decreased microbial diversity and CH4yield compared to the no-CTC treatment.

Publication Title

Bioresource Technology

Volume

102

Issue

17

First Page

7807

Last Page

7814

DOI of Published Version

10.1016/j.biortech.2011.06.038

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