Inhibitory effect of triclosan and nonylphenol on respiration rates and ammonia removal in activated sludge systems

Stasinakis, AS; Mamais, D; Thomaidis, NS; Danika, E; Gatidou, G; Lekkas, TD

dc.contributor.author	Stasinakis, AS	en
dc.contributor.author	Mamais, D	en
dc.contributor.author	Thomaidis, NS	en
dc.contributor.author	Danika, E	en
dc.contributor.author	Gatidou, G	en
dc.contributor.author	Lekkas, TD	en
dc.date.accessioned	2014-03-01T01:28:41Z
dc.date.available	2014-03-01T01:28:41Z
dc.date.issued	2008	en
dc.identifier.issn	0147-6513	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18915
dc.subject	EC50 values	en
dc.subject	Nitrification	en
dc.subject	Respiration rate	en
dc.subject	Sludge age	en
dc.subject	Toxicity	en
dc.subject	Wastewater	en
dc.subject.classification	Environmental Sciences	en
dc.subject.classification	Toxicology	en
dc.subject.other	ammonia	en
dc.subject.other	nonylphenol	en
dc.subject.other	triclosan	en
dc.subject.other	activated sludge	en
dc.subject.other	ammonia	en
dc.subject.other	bacterium	en
dc.subject.other	bioassay	en
dc.subject.other	comparative study	en
dc.subject.other	disinfection	en
dc.subject.other	inhibition	en
dc.subject.other	nitrification	en
dc.subject.other	oxygen	en
dc.subject.other	phenolic compound	en
dc.subject.other	pollutant removal	en
dc.subject.other	respiration	en
dc.subject.other	risk factor	en
dc.subject.other	toxicity test	en
dc.subject.other	wastewater	en
dc.subject.other	activated sludge	en
dc.subject.other	article	en
dc.subject.other	bacterial metabolism	en
dc.subject.other	bioassay	en
dc.subject.other	biomass	en
dc.subject.other	nitrification	en
dc.subject.other	nonhuman	en
dc.subject.other	Vibrio fischeri	en
dc.subject.other	waste water management	en
dc.subject.other	Ammonia	en
dc.subject.other	Anti-Infective Agents, Local	en
dc.subject.other	Biomass	en
dc.subject.other	Bioreactors	en
dc.subject.other	Luminescence	en
dc.subject.other	Phenols	en
dc.subject.other	Sewage	en
dc.subject.other	Triclosan	en
dc.subject.other	Vibrio fischeri	en
dc.subject.other	Water Pollutants, Chemical	en
dc.subject.other	Bacteria (microorganisms)	en
dc.subject.other	Vibrio fischeri	en
dc.title	Inhibitory effect of triclosan and nonylphenol on respiration rates and ammonia removal in activated sludge systems	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ecoenv.2007.12.011	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ecoenv.2007.12.011	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	The toxic effects of triclosan (TCS) and nonylphenol (4-n-NP) on activated sludge heterotrophic and autotrophic microorganisms were evaluated. Toxicity experiments with specific oxygen uptake rate (SOUR) and ammonia uptake rate (AUR) revealed that TCS was much more toxic to heterotrophic and autotrophic microorganisms than 4-n-NP. In experiments with heterotrophic biomass, increase of sludge age (theta(c)) from 5 to 15 days resulted in a decrease of median effective concentrations (EC50) of TCS from 38.2 to 9.97mgl(-1) and in an increase of EC50 values of 4-n-NP from 441 to 649 mgl(-1). In experiments with autotrophic biomass and sludge age of 15 days, significantly lower EC50 values were obtained for both compounds, indicating the higher sensitivity of nitrifiers to TCS and 4-n-NP. To compare toxicity of TCS and 4-n-NP towards single species and mixed wastewater cultures, experiments were performed using marine bacterium Vibrio fischeri. EC50 values of 0.22 and 3.51 mgl(-1) were estimated for TCS and 4-n-NP, respectively, indicating the higher sensitivity of this bioassay to toxicants. According to the levels of tested compounds commonly found in influent wastewater and the results of this study, there is a possible risk for deterioration of nitrification in activated sludge systems due to the presence of TCS. (c) 2007 Elsevier Inc. All rights reserved.	en
heal.publisher	ACADEMIC PRESS INC ELSEVIER SCIENCE	en
heal.journalName	Ecotoxicology and Environmental Safety	en
dc.identifier.doi	10.1016/j.ecoenv.2007.12.011	en
dc.identifier.isi	ISI:000256640800001	en
dc.identifier.volume	70	en
dc.identifier.issue	2	en
dc.identifier.spage	199	en
dc.identifier.epage	206	en