AI Article Synopsis
- The study investigates the impact of titanium dioxide (TiO) nanoparticles on anaerobic digestion, a process used for treating wastewater and waste sludge.
- It was found that the presence of TiO nanoparticles increased methane production by an average of 14.9%, indicating a beneficial effect on the digestion process.
- The research also revealed that a significant majority (92%) of the TiO nanoparticles were removed by anaerobic sludge, while only 8% were found in the treated effluent, highlighting their interaction with extracellular polymeric substances (EPS) in the microbial community.
Article Abstract
The increasing use of TiO nanoparticles (NPs) in customer products has also increased the concerns about their effects in the environment. Anaerobic digestion is a process probably exposed to high concentrations of TiO NPs due to its application for wastewater and waste sludge treatment. In this work, it was studied the anaerobic digestion performance and the extracellular polymeric substances (EPS) production in presence of TiO NPs, as well as the fate of TiO NPs in anaerobic reactors. Results showed that methane production enhanced an average of 14.9% in presence TiO NPs, which is considered a positive effect. A strong affinity between TiO NPs and EPS was found, especially for proteins (PRO) and polysaccharides (PS) in the loosely and tightly bound EPS layers of microorganisms (LB-EPS and TB-EPS). Ti quantification indicated that 92% of the TiO NPs are removed by anaerobic sludge, while 8% remain in the treated effluent.
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| http://dx.doi.org/10.1016/j.jenvman.2018.05.074 | DOI Listing |
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