Combining chlorination and chloramination processes for the inhibition of biofilm formation in drinking surface water system models

Momba, Maggy Ndombo Benteke; Binda, M.A.

doi:10.1046/j.1365-2672.2002.01556.x

Cited by 22 publications

(10 citation statements)

References 33 publications

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“…Studies showed that biofilm formation occurred even in the presence of free residual chlorine concentrations higher than 2.5 mg/1 (Momba and Binda, 2002), and also ozonation had no effect on biofilm formation on polyvinyl chloride (PVC), polyethylene (PV) and stainless steel pipe surfaces (Zacheus et al 2000). Also, biofilms induce a disinfectant demand and consequently promote disinfectant decay in distribution systems (Flemming, 2002).…”

Section: Post Uv Disinfectant Effect On Biofouling In Water Distributmentioning

confidence: 99%

Impact of Particles on Uv Disinfection of Water and Wastewater Effluents: A Review

Mamane¹

2008

Reviews in Chemical Engineering

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Particles in water sources may be classified in various groups such as living vs. non-living, nano vs. sub-micron to micron sized and mineral vs. organic. Living particles for example comprise of bacteria, viruses, protozoa and algae while non-living particles include mineral particles, organic particles, cell debris and macromolecules. Particles in water sources may be dispersed as single entities or associated with multiple particles in floes or aggregates. Particles may be further characterized by their chemical nature, size distribution, density, absorbance, scattering and typical gross measurements such as turbidity and suspended solids. Although ultraviolet (UV) irradiation is principally accepted as a primary disinfection technology for use in water and wastewater effluent, still research is needed to understand the extent to which particles in water may hinder the UV treatment efficacy by interacting with microbial pathogens. Both of the phenomena: (1) particles physically associated with microorganisms in a clump or aggregate and (2) particles not physically associated with microorganisms however interact by shielding, absorbing, scattering or blocking UV light, are integrated in the term "particle-microbe interactions". This review covers the impact of the interaction between microorganisms (mainly bacteria) which are the target for UV disinfection and particles in water and wastewater effluents on the efficacy of UV disinfection.

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Section: Post Uv Disinfectant Effect On Biofouling In Water Distributmentioning

confidence: 99%

Impact of Particles on Uv Disinfection of Water and Wastewater Effluents: A Review

Mamane¹

2008

Reviews in Chemical Engineering

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“…On the other hand, as the bulk water bacteria are living freely suspended in the water and the pipe wall biofilm bacteria are growing on a support surface, the difference may also be attributed to the varying attachment capabilities of different groups of bacteria. If the conclusion that the majority of the biomass is in the biofilm and that bulk water bacteria mainly originate from pipe wall biofilm detachment is true, then the difference could also be related to the detachment Properties of the biofilm bacteria [23]. For example, only the top layers (loose structure) are readily released into bulk water, and the inner biofilm remains attached to the pipe wall.…”

Section: Isolation Of Genomic Dna Pcr Amplification and Sequencing Omentioning

confidence: 99%

Isolation, Characterization and Sequencing of Biofilm Bacterial Consortia from Drinking Water PVC Pipelines and their Influence on Corrosion of Mild Steel

Prasad¹

2017

COJNH

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Drinking water distribution system biofilms were investigated for the presence of hygienically relevant microorganisms. In this study we collected four PVC pipes from different Drinking water and studied the biofilm morphology, Characterizing the formation of biofilm on Polyvinyl chloride (PVC) pipe lines were analyzed by using the techniques, X-ray diffraction (XRD), Raman microscopy (RMS), X-ray fluorescence spectroscopy (XRF), Fourier transform infrared spectroscopy (FT-IR), and Scanning electron microscopy (SEM EDAX). Biofilm formation in drinking water PVC pipelines is due to many factors including pH, temperature, salt etc. In this study, microbiological aspects of biofilm formation and their role on electrochemical studies are presented. We report the design and evaluation of PCR primers 63f and 1387r for amplification of 16SrRNA genes from bacterial isolates, Phylogenetic analysis of partially sequenced 16SrRNA gene sequences revealed the diversity of bacterial and fungal strains in the PVC pipeline 7 different bacterial phyla were detected. In addition, localized biofilm of the PVC pipeline in the presence of the consortia was observed by scanning electron microscopy analysis and morphology was seen in EPI fluorescence microscopy, The dominant bacterial species identified in the PVC pipeline biofilm samples were Sphingobacterium sp respectively, several types of bacteria may be involved in biofilm arising and the potential role of each species in biofilm formation is discussed. Therefore, calcium carbonate and the allied calcium compounds are responsible for the biofilm formation in PVC pipes and these inferences may lead to develop effective water purification measures.

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“…However, to decrease the organic content would be a very expensive process and ineffective toward bacteria in DWDS, which are able to grow in oligotrophic environments. [106][107][108] Ultra-pure water systems have been found to support the formation of biofilms, even if these systems have a lower organic content than DWDS. 79,109 Nevertheless, some European countries, notably the Netherlands, Germany, Austria and Switzerland, have taken the approach of distributing high quality DW without the use of residual chlorine.…”

Section: Pre-treatmentmentioning

confidence: 99%

Biofilms in drinking water: problems and solutions

Simões

2013

RSC Adv.

153

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The main goal of water companies is to deliver to each consumer microbiologically safe drinking water (DW), adequate in quantity and delivery pressure and acceptable in terms of taste, odour and appearance. Drinking water distribution systems (DWDS) are known to harbour biofilms, even in the continuous presence of a disinfectant. These biofilms are a source of planktonic bacteria, which will remain present when the water is delivered through a consumer's tap. The presence of biofilms in DWDS constitutes one of the currently recognized hazards affecting the microbiological quality of the product and may lead to a number of unwanted effects on the organoleptic quality of the distributed water. Importantly, biofilms constitute a persistent reservoir of pathogenic microorganisms, which are responsible for several waterborne diseases. Antimicrobial products, particularly chlorine, have been the main weapons used to disinfect DW. Although this strategy is widespread, there are not yet standardized disinfection strategies with reliable efficacy in the control of biofilms. This review covers the advances in the knowledge of public health problems caused by the presence of biofilms in DWDS and the current strategies for DW disinfection and associated biofilms. Manuel Simões studied Biological Engineering and received a PhD in Chemical and Biological Engineering from the University of Minho. Following post-doctoral work at the same university, he joined CITAB at the University of Trás-os-Montes e Alto Douro as a research fellow. Since 2008, he has been an Assistant Professor and member of the LEPAE in the Department of Chemical Engineering of the Faculty of Engineering at the University of Porto. His main research interests focus on the mechanisms of biofilm formation and their control with antimicrobial agents.

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Combining chlorination and chloramination processes for the inhibition of biofilm formation in drinking surface water system models

Cited by 22 publications

References 33 publications

Impact of Particles on Uv Disinfection of Water and Wastewater Effluents: A Review

Impact of Particles on Uv Disinfection of Water and Wastewater Effluents: A Review

Isolation, Characterization and Sequencing of Biofilm Bacterial Consortia from Drinking Water PVC Pipelines and their Influence on Corrosion of Mild Steel

Biofilms in drinking water: problems and solutions

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