Investigation of assimilable organic carbon (AOC) in flemish drinking water

Polańska, Monika; Huysman, Koen; Keer, Chris Van

doi:10.1016/j.watres.2005.04.015

Cited by 59 publications

(38 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These amounts of ATP-phosphorus could theoretically support bacterial growth on AOC in the range of 0.2e32.8 mg-C L À1 , estimated by an approximate C:P ratio of 100:1. According to the biological stability concept, the threshold AOC concentration in non-chlorinated and respectively chlorinated water is 10 mg L À1 and 100 mg L À1 (LeChevallier et al, 1991;Liu et al, 2002;Polanska et al, 2005;van der Kooij, 1992). Hence, it is evident that ATP released from bacteria during chlorination at concentrations above a certain value (c.a.…”

Section: Role Of the Extracellular Atp In Bacterial Growthmentioning

confidence: 99%

Behavior and stability of adenosine triphosphate (ATP) during chlorine disinfection

2016

View full text Add to dashboard Cite

Section: Role Of the Extracellular Atp In Bacterial Growthmentioning

confidence: 99%

Behavior and stability of adenosine triphosphate (ATP) during chlorine disinfection

2016

View full text Add to dashboard Cite

“…A second important effect on the taxonomic composition of the microflora of the DWSS stemmed from the chlorination as detected best by the RNA-based fingerprints. It is well known that chlorination not only kills most bacterial cells but it also produces an increase in assimilable organic carbon (AOC) due to the reaction of free chlorine with the dissolved organic carbon (DOC) present in natural water (29). This AOC consists of a variety of low-molecular-weight compounds that provide substrates for the growth of heterotrophic bacteria (5,13).…”

Section: Vol 72 2006 Microbial Community Dynamics In Drinking Watermentioning

confidence: 99%

Composition and Dynamics of Bacterial Communities of a Drinking Water Supply System as Assessed by RNA- and DNA-Based 16S rRNA Gene Fingerprinting

Eichler

Christen

Höltje

et al. 2006

Appl Environ Microbiol

188

174

View full text Add to dashboard Cite

Bacterial community dynamics of a whole drinking water supply system (DWSS) were studied from source to tap. Raw water for this DWSS is provided by two reservoirs with different water characteristics in the Harz mountains of Northern Germany. Samples were taken after different steps of treatment of raw water (i.e., flocculation, sand filtration, and chlorination) and at different points along the supply system to the tap. RNA and DNA were extracted from the sampled water. The 16S rRNA or its genes were partially amplified by reverse transcription-PCR or PCR and analyzed by single-strand conformation polymorphism community fingerprints. The bacterial community structures of the raw water samples from the two reservoirs were very different, but no major changes of these structures occurred after flocculation and sand filtration. Chlorination of the processed raw water strongly affected bacterial community structure, as reflected by the RNA-based fingerprints. This effect was less pronounced for the DNA-based fingerprints. After chlorination, the bacterial community remained rather constant from the storage containers to the tap. Furthermore, the community structure of the tap water did not change substantially for several months. Community composition was assessed by sequencing of abundant bands and phylogenetic analysis of the sequences obtained. The taxonomic compositions of the bacterial communities from both reservoirs were very different at the species level due to their different limnologies. On the other hand, major taxonomic groups, well known to occur in freshwater, such as Alphaproteobacteria, Betaproteobacteria, and Bacteroidetes, were found in both reservoirs. Significant differences in the detection of the major groups were observed between DNA-based and RNA-based fingerprints irrespective of the reservoir. Chlorination of the drinking water seemed to promote growth of nitrifying bacteria. Detailed analysis of the community dynamics of the whole DWSS revealed a significant influence of both source waters on the overall composition of the drinking water microflora and demonstrated the relevance of the raw water microflora for the drinking water microflora provided to the end user.

show abstract

“…While there was microbial removal by the UF membrane, regrowth should also be expected. Nutrients are still available in the water, especially after chlorination where lower molecular weight organic carbon is increased and become relatively easier for the bacterial cells to assimilate [31,32]. Continual bacterial growth is therefore expected on equipment, pipe and tank surfaces that were not easily sanitized throughout the pilot plant operations.…”

Section: Discussionmentioning

confidence: 99%

Dynamics of microbial communities in an integrated ultrafiltration–reverse osmosis desalination pilot plant located at the Arabian Gulf

Hong

Moosa

Mink

2016

Desalination and Water Treatment

View full text Add to dashboard Cite

This study demonstrated the use of high-throughput sequencing to assess the efficacy of an integrated Ultrafiltration (UF)-Reverse Osmosis (RO) desalination pilot plant located at the Arabian Gulf, and to identify potential microbial-associated problems that may arise in this plant.When integrated into the desalination treatment system, the UF membranes were able to serve as a good pretreatment strategy to delay RO fouling by achieving up to 1.96-log removal of cells from the seawater. Consequently, the differential pressure of the RO membrane remained around 1 bar for the entire 6-month study, suggesting no significant biofouling performance issue identified for this RO system. Examples of microbial populations effectively removed by the UF membranes from the feed waters included Nitrosoarchaeum limnia and phototrophic eukaryotes.Microbial-associated problems observed in this pilot plant included the presence of Pseudomonas spp. in coexistence with Desulfovibrio spp. These two bacterial populations can reduce sulfate and produce hydrogen sulfide, which would in turn cause corrosion problems or compromise membrane integrities. Chemical-enhanced backwashing (CEB) can be used as an effective strategy to minimize the associated microbial problems by removing bacterial populations including sulfate-reducers from the UF membranes.

show abstract

Investigation of assimilable organic carbon (AOC) in flemish drinking water

Cited by 59 publications

References 21 publications

Behavior and stability of adenosine triphosphate (ATP) during chlorine disinfection

Behavior and stability of adenosine triphosphate (ATP) during chlorine disinfection

Composition and Dynamics of Bacterial Communities of a Drinking Water Supply System as Assessed by RNA- and DNA-Based 16S rRNA Gene Fingerprinting

Dynamics of microbial communities in an integrated ultrafiltration–reverse osmosis desalination pilot plant located at the Arabian Gulf

Contact Info

Product

Resources

About