Response of Activated Sludge to Long-Term Nanosilver Input and Changes in Extracellular Polymeric Substances (EPS)

Çeçen, Ferhan; Geyik, Ayşe Gül; Kılıç, Başak

doi:10.1007/s11270-020-04882-7

Cited by 3 publications

(3 citation statements)

References 28 publications

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“…Then, it was also continuously dosed with AgNP. The details of operation and the composition of synthetic wastewater feed can ICEPR 121-2 be found in previous studies [7,8]. The inhibitory effect of Ag + on activated sludge in RP was studied in the range 0-5 mg/L Ag + .…”

Section: Operation Of Two Reactorsmentioning

confidence: 99%

“…Always freshly prepared nanosilver was dosed to the RPAgNP reactor. Details of the measurement and analyses can be found in a previous study [8].…”

Section: Operation Of Two Reactorsmentioning

confidence: 99%

“…As known, metal input usually triggers the production of EPS. Increase in EPS production might enable bacteria to protect themselves from inhibitory effects of silver [8].…”

Section: Inhibitory Effect Of Nanosilver On Activated Sludge In Rpagnpmentioning

confidence: 99%

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Inhibitory Effect of Silver and Nanosilver on Activated Sludge Fed with Proteinaceous Feed

Kılıç¹,

Çeçen²,

Peker³

2022

Proceedings of the 8th World Congress on New Technologies

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This study investigates the response of activated sludge that is fed with proteinaceous feed to silver (Ag + ) and continuous nanosilver (AgNPs) input. Substrate removal (COD) and respiration of activated sludge were examined in two reactors fed with only peptone as an organic substrate and inorganics. Results showed that substrate removal was not affected by the high concentrations of Ag + and AgNP neither in short-nor in long-term. It was concluded that peptone in the feed formed complexes with silver and reduced its negative effects. Also, in long-term, AgNP lost its effectiveness upon continuous aeration. Moreover, in long-term, biomass protected itself from the inhibitory effect of AgNP by regulating the production of Extracellular Polymeric Substances (EPS). Therefore, no negative impact of silver and nanosilver on substrate removal and change in sludge characteristics would be expected.

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Section: Operation Of Two Reactorsmentioning

confidence: 99%

“…Always freshly prepared nanosilver was dosed to the RPAgNP reactor. Details of the measurement and analyses can be found in a previous study [8].…”

Section: Operation Of Two Reactorsmentioning

confidence: 99%