Toxic response of Nitrosomonas europaea to copper in inorganic medium and wastewater

Kinetics of Nitrosomonas europaea at extreme substrate, product and salt concentrations

“…Only Loehr et al (1973) reported nitrification of animal wastes with ammonia concentrations up to 500 mmol NH2-/din 3, they qualitatively observed inhibition with increasing ammonia concentrations. In a sttidy on the influence of copper on Nitrosomonas europaea by Sato et al (1988), where ammonia concentrations up to 264 mmol N H 2 / dm ~ are used as a control, substrate inhibition was only observed at the highest concentration of 264 mmol NH~-/dm 3.…”

Modelling combined effect of chloramine and copper on ammonia-oxidizing microbial activity using a biostability approach

“…For example, Sato et al (1988) reported that the amine complex of Cu inhibited the growth of Nitrosomonas europaea, but Waara and Wilander (1985) reported low copper concentrations (0.20 mg-Cu L À1 ) were toxic to nitrifying bacteria in waters with low chelating capacity. The latter supports Braam and Klapwijk (1981), who concluded that free copper (Cu 2þ ) was the major species to inhibit nitrification.…”

Monitoring of population shifts in an enriched nitrifying system under gradually increased cadmium loading

“…and ammonia oxidation was the rate limiting step under metal-stressed conditions. In literature, Nitrosomonas species were generally taken as representatives of ammonia oxidizers in pure culture nutrient removal studies [14,18,19]. However, there is a high diversity of ammonia oxidizing bacteria in full-scale nutrient removal systems.…”

“…However, it has not been clarified yet what kind of acclimated microorganisms can tolerate heavy metal toxicity. Some researchers examined the effects of heavy metals on nitrifying systems using pure cultures of Nitrosomonas species and studied the threshold levels [18,19]. However, it is well known that there is a high diversity of ammonia-oxidizing 0304-3894/$ -see front matter © 2008 Elsevier B.V. All rights reserved.…”