Details

Autor(en) / Beteiligte

• Zhang, Jingxin
• Zhang, Le
• Loh, Kai-Chee
• Dai, Yanjun
• Tong, Yen Wah

Titel

Enhanced anaerobic digestion of food waste by adding activated carbon: Fate of bacterial pathogens and antibiotic resistance genes

Ist Teil von

• Biochemical engineering journal, 2017-12, Vol.128, p.19-25

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Activated carbon (AC) greatly enhanced methane yield from anaerobic digestion of food waste.•Adding AC decreased total abundance of bacterial pathogens by about 20%.•AC addition decreased antibiotic resistance genes including tetA, tetM, and tetW.•11 bacterial pathogens were detected from sludge samples of R1, R2 and seed sludge. Effects of activated carbon (AC) addition on biogas production, bacterial pathogens removal and antibiotic resistance genes (ARGs) during anaerobic digestion (AD) for food waste were investigated. Results indicate that anaerobic digesters with AC addition (R1) maintained stable operation with methane yield of 0.35L CH4/L/g VS at high organic loading rate of 4.38g VSFW/L/d while the control digesters displayed less stability and caused acidification. Some specific dominant bacteria were enriched in R1, resulting in a lower microbial biodiversity. A total of 11 bacterial pathogens and 12 ARGs was detected in the sludge samples. Compared to the control, adding AC enhanced the AD process by decreasing the relative abundance of bacterial pathogens by 18%. Moreover, AC supplementation also facilitated reduction of abundant ARGs, including tetA, tetM, tetW, tetO, tetQ, sul2 and tetX. This study may provide an ecological treatment method for AD with the addition of AC.