Bacterial invasion potential in water is determined by nutrient availability and the indigenous community

Nevel, Sam Van; Roy, Karen De; Boon, Nico

doi:10.1111/1574-6941.12145

Cited by 48 publications

(47 citation statements)

References 61 publications

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“…Recent work aimed at understanding the potential for pathogen proliferation in drinking water systems revealed that pathogens were outcompeted by native microbial communities adapted to life in drinking water [46,47]. These results reinforce the recommendation to isolate pesticide degraders from environments and under conditions that are similar to those in which the bioaugmentation will occur [36 ].…”

Section: Bioaugmentation In Pesticide-contaminated Water Resourcesmentioning

confidence: 57%

Bioremediation of pesticide-contaminated water resources: the challenge of low concentrations

Helbling

2015

Current Opinion in Biotechnology

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Section: Bioaugmentation In Pesticide-contaminated Water Resourcesmentioning

confidence: 57%

Bioremediation of pesticide-contaminated water resources: the challenge of low concentrations

Helbling

2015

Current Opinion in Biotechnology

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“…Previous studies showed the same antagonism (Chandran and Mohamed Hatha, 2005;Vital et al, 2012;Van Nevel et al, 2013). Antagonism may arise FIGURE 4 | Inactivation of E. coli at various conditions during (A,B) chlorination and (C) electrolysis.…”

Section: Indigenous Microbial Communitymentioning

confidence: 77%

Controlling Bacterial Pathogens in Water for Reuse: Treatment Technologies for Water Recirculation in the Blue Diversion Autarky Toilet

Nguyen

Allemann

Ziemba

et al. 2017

Front. Environ. Sci.

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Highlight• Bacterial growth in fecally-contaminated water is highly variable and dependent on several factors. • Regrowth occurs after chlorination (low doses, no residual).• Indigenous microbial communities variably impact bacterial growth.• A combination of treatments can both inactivate and inhibit growth.The Blue Diversion AUTARKY Toilet is a urine-diverting toilet with on-site treatment. The toilet is being developed to provide a safe and affordable sanitation technology for people who lack access to sewer-based sanitation. Water used for personal hygiene, hand washing, and flushing to rinse urine-and feces-collection bowls is treated, stored, and recycled for reuse to reduce reliance on external water supplies. The system provides an opportunity to investigate hygiene of water for reuse following treatment. Treatment in the toilet includes a Biologically Activated Membrane Bioreactor (BAMBi) followed by a secondary treatment technology. To identify effective secondary treatment, three options, including granular activated carbon (GAC) only, GAC+chlorine (sodium hypochlorite), and GAC+electrolysis are considered based on the bacterial inactivation and growth inhibition efficiency. Four different hygiene-relevant bacteria are tested: Escherichia coli, Enterococcus faecalis, Pseudomonas aeruginosa, and Salmonella typhimurium. Our evaluation demonstrates that-despite treatment of water with the BAMBi-E. coli, P. aeruginosa, and S. typhimurium have the potential to grow during storage in the absence of microbial competition. Including the indigenous microbial community influences bacterial growth in different ways: E. coli growth decreases but P. aeruginosa growth increases relative to no competition. The addition of the secondary treatment options considerably improves water quality. A column of GAC after the BAMBi reduces E. coli growth potential by 2 log 10 , likely due to the reduction of carbon sources. Additional treatments including chlorination and electrolysis provide further safety margins, with Nguyen et al. Pathogens in Water for Reuse more than 5 log 10 inactivation of E. coli. However, reactivation and/or regrowth of E. coli and P. aeruginosa occurs under in the absence of residual disinfectant. Treatment including the BAMBi, GAC, and electrolysis appear to be promising technologies to control bacterial growth during storage in water intended for reuse.

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“…Therefore, for further measurements the frequency was set at 100Hz, selected based on the literature [14]. Subsequently, the measurement of biofilm was carried out continuously in flow conditions for 30 days [15]. The measurements were carried out at intervals of 10 seconds.…”

Section: Resultsmentioning

confidence: 99%

The application of impedance measurement to assess biofilm development on technical materials used for water supply system construction

2017

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Abstract. The lack of biological stability of water which is introduced into the network, leads primarily to its secondary contamination during transport to the consumer. The water that is biologically unstable creates ideal conditions for colonization of the inner surface of pipelines by microorganisms and adhesion of their products (biocorrosion). The studies was conducted using the identified microorganisms isolated from the water supply network which accounted inocula in continuous culture of biofilm in CDC reactor. As a result of studies it was revealed the presence of biofilm formed on different materials polyethylene, polypropylene, polyvinyl chloride, polybutylene. Microbiological biodiversity of organisms inhabiting a biofilm of the diversity of nucleic acids was used. It was observed the amount of the psychrophilic bacteria oscillation in the effluent from the reactor. It was also determined the affinity of various bacteria to the plastic through adhesion measurement using impedance spectroscopy. For impedance measurements apparatus SIGNAL RECOVERY 7280 DSP LOCK-IN AMPLIFIER was used, recording impedance components (real and imaginary). The results will allow for the creation of biosensor systems that can be used in predicting health risks in connection with drinking water and taking corrective actions.

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Bacterial invasion potential in water is determined by nutrient availability and the indigenous community

Cited by 48 publications

References 61 publications

Bioremediation of pesticide-contaminated water resources: the challenge of low concentrations

Bioremediation of pesticide-contaminated water resources: the challenge of low concentrations

Controlling Bacterial Pathogens in Water for Reuse: Treatment Technologies for Water Recirculation in the Blue Diversion Autarky Toilet

The application of impedance measurement to assess biofilm development on technical materials used for water supply system construction

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