Personne

Tamar Kohn

Publications associées (124)

Competitive co-adsorption dynamics of viruses and dissolved organic matter to positively charged sorbent surfaces

Tamar Kohn, Antonius Magdi Hakeem Armanious

Adsorption onto solid water interfaces is a key process governing the fate and transport of waterborne viruses. Although negatively charged viruses are known to extensively adsorb onto positively charged adsorbent surfaces, virus adsorption in such systems ...

Amer Chemical Soc2016

Hygiene considerations during the collection, storage and processing of source-separated urine into a marketable fertilizer

Tamar Kohn, Simon Schindelholz, Manfred Schoger

Laboratory and field studies along with inactivation data from the literature are used to model bacteria inactivation during urine storage and struvite production. The model is used to evaluate urine storage and struvite drying under the fluctuating temper ...

2016

Inactivation of enteric viruses by ozone

Urs von Gunten, Tamar Kohn, Camille Wolf

In Switzerland, newly introduced regulation mandates the upgrade of major wastewater treatment plants (WWTP) with an advanced treatment step such as ozonation. This offers a unique opportunity to study the inactivation of enteric virus during ozonation of ...

2016

Viruses at solid-water interfaces: A systematic assessment of interactions driving adsorption

Tamar Kohn, Meret Aeppli, Anne Thérèse Sigstam, Antonius Magdi Hakeem Armanious, Dominik Refardt

Adsorption to solid-water interfaces is a major process governing the fate of waterborne viruses in natural and engineered systems. The relative contributions of different interaction forces to adsorption and their dependence on the physicochemical propert ...

Amer Chemical Soc2016

Ammonia as an in-situ sanitizer: influence of virus genome type on inactivation

Tamar Kohn, Loïc Decrey, Shinobu Kazama

Treatment of human excreta and animal manure (HEAM) is key in controlling the spread of persistent enteric pathogens such as viruses. The extent of virus inactivation during HEAM storage and treatment appeared to vary with virus genome type, though the rea ...

American Society for Microbiology2016

Bacteria inactivation during the drying of struvite fertilizers produced from stored urine

Tamar Kohn, Loïc Decrey, Simon Schindelholz, Manfred Schoger, Kai Udert

Human urine can be processed into market-attractive fertilizers like struvite; however, concerns regarding the microbial safety of such products remain. The present study evaluated the inactivation of in situ heterotrophs, total bacteria as observed by flo ...

Amer Chemical Soc2016

Towards sustainable sanitation: Mitigating microbial health risks in the production of urine-derived fertilizers

Tamar Kohn, Loïc Decrey, Simon Schindelholz, Linda Strande, Manfred Schoger, Ariane Schertenleib, Kai Udert, Christa McArdell

To identify and address health and safety challenges, first, I conducted a screening of fecal pathogens in source-separated urine. The pathogen inactivation performance of two innovative fertilizer production technologies was then evaluated in laboratory a ...

2016

Quantifying microbial risks of field-scale struvite production from source-separated urine using first-person videography exposure assessment

Tamar Kohn, Ana Karina Pitol Garcia, Timothy R. Julian

This paper quantifies occupational exposures to pathogens in urine during urine collection and processing into fertilizer as well as attendant risks of infection from indirect pathogen exposure. We also detail the microlevel activity time series (MLATS) me ...

2016

Isolation and characterization of disinfection-resistant Enteroviruses

Tamar Kohn, Simon Meister, Marius Klinger

Human enteric viruses are a leading cause of waterborne disease outbreak worldwide. Their environmental persistence and resistance to disinfection treatments are two main factors that can influence the dissemination of these viruses, thus increasing the ri ...

2016

Technologies for the treatment of source-separated urine in the eThekwini Municipality

Tamar Kohn, Linda Strande, Kai Udert, Bastian Etter

In recent years, a large number of urine-diverting dehydration toilets (UDDTs) have been installed in eThekwini to ensure access to adequate sanitation. The initial purpose of these toilets was to facilitate faeces drying, while the urine was diverted into ...

2015

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