|
| Comparison of anaerobic digestion systems in swine wastewater treatment with different chlortetracycline addition methods |
| Received:April 27, 2018 |
| View Full Text View/Add Comment Download reader |
| KeyWord:chlortetracycline;anaerobic fermentation;swine wastewater;methane production;methanogen diversity |
| Author Name | Affiliation | E-mail | | CAO Jun-chao | College of Animal Science, South China Agricultural University, Guangzhou 510642, China | | | WANG Xiao-qing | College of Animal Science, South China Agricultural University, Guangzhou 510642, China | | | MA Bao-hua | Nanhai Entry-Exit Inspection and Quarantine Bureau, Foshan 528200, China | | | ZOU Yong-de | Nanhai Entry-Exit Inspection and Quarantine Bureau, Foshan 528200, China | | | LIAO Xin-di | College of Animal Science, South China Agricultural University, Guangzhou 510642, China | | | PANG Yan-ling | College of Animal Science, South China Agricultural University, Guangzhou 510642, China | | | WU Yin-bao | College of Animal Science, South China Agricultural University, Guangzhou 510642, China
Key Laboratory of Ecological Agro-Environment in the Tropics of Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, China | wuyinbao@scau.edu.cn |
|
| Hits: 1930 |
| Download times: 1791 |
| Abstract: |
| This study examined the effect of chlortetracycline (CTC) addition methods (using manure collected from swine fed with CTC or adding CTC directly) on anaerobic digestion systems in swine wastewater treatment under two different CTC concentrations (310.54 mg·kg-1 DM and 160.05 mg·kg-1 DM) using 1.3 L anaerobic reactors run at 30℃ for 7 consecutive days. Concentrations of CTC and its active metabolite 4-epi-CTC, methane production, pH, and methanogen diversity were examined. The results showed that the concentration of CTC in the direct addition group, with an initial CTC concentration of 310.54 mg·kg-1, was significantly higher than that of the in vivo group (P<0.05). Meanwhile, the concentration of 4-epi-CTC in the latter was significantly higher than that in the former (P<0.05). Methane production in the direct addition group was reduced by 4.40% and 5.22%, respectively, at the two concentrations, compared to the in vivo group (P<0.05). The pH of the biogas slurry in the direct addition method group was significantly lower than that in the in vivo and blank groups (P<0.05). Both addition methods had no significant effect on the diversity of methanogens in the anaerobic digestion system (P>0.05). The direct addition of 310.54 mg·kg-1 CTC led to high CTC accumulation in the anaerobic digestion system, significantly reduced the pH of the biogas slurry, and inhibited the amount of methane produced. Therefore, the effects of different CTC addition methods on the anaerobic digestion system in swine wastewater treatment were different under the experimental conditions, and the use of an in vivo method might reflect actual production and provide more accurate results. |
|
|
|
