Abstract
In this study, a toxicity assay using a mesophilic wastewater treatment plant sludge-based (SI) and a thermophilic manure-based inoculum (MI), under different biomass concentrations was performed to define the effects of diclofenac (DCF), triclosan (TCS), and nonylphenol (NP) on anaerobic digestion (AD) process. Additionally, the influence of DCF, TCS, and NP on the relative abundance of the methanogenic populations was investigated. Results obtained demonstrated that, in terms of methane production, SI inoculum was more resistant to the toxicity effect of DCF, TCS, and NP, compared to the MI inoculum. The IC50 values were 546, 35, and 363mgL-1 for SI inoculum and 481, 32, and 74mgL-1 for MI inoculum for DCF, TCS, and NP, respectively. For both inocula, higher biomass concentrations reduced the toxic effect of TCS (higher methane production up to 64%), contrary to DCF, where higher biomass loads decreased methane yield up to 31%. Fluorescence in situ hybridization analysis showed that hydrogenotrophic methanogens were more resistant to the inhibitory effect of DCF, TCS, and NP compared to aceticlastic methanogens.
| Original language | English |
|---|---|
| Pages (from-to) | 45-51 |
| Number of pages | 7 |
| Journal | Journal of Hazardous Materials |
| Volume | 291 |
| DOIs | |
| Publication status | Published - 2015 |
| Externally published | Yes |
| Publication type | A1 Journal article-refereed |
Funding
We thank Hector Garcia for technical assistance with the experiment. This research has been co-financed by the European Union (European Social Fund – ESF) and Greek National Funds through the Operational Program “Education and Lifelong Learning” of the National Strategic Reference Framework (NSRF) – Research Funding Program: THALES. Invesment in knowledge society through the European Social Fund. WATERMICROPOL: www.aegean.gr/environment/watermicropol .
Keywords
- Biomethanation
- IC
- PPCPs
- Toxicity
- Xenobiotics
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- Waste Management and Disposal
- Pollution
- Health, Toxicology and Mutagenesis
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