Slowly biodegradable organic compounds impact the biostability of non-chlorinated drinking water produced from surface water

Hijnen, W.A.M.; Schurer, R.; Bahlman, J.A.; Ketelaars, Henk A. M.; Italiaander, Ronald; Wal, A. van der; Wielen, P.W.J.J. van der

doi:10.1016/j.watres.2017.10.068

Cited by 46 publications

(23 citation statements)

References 44 publications

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“…Understanding the ability of bacteria to utilize HMW compounds is essential, since such compounds form a significant fraction of DOC in drinking water. Moreover, the actual bacterial growth in distribution systems was found to be strongly influenced by the concentration of HMW compounds, rather than easily biodegradable substances (Hijnen et al, 2018).…”

Section: Effect Of Sample Pre-treatment On Bgpmentioning

confidence: 99%

Measuring Bacterial Growth Potential of Ultra-Low Nutrient Drinking Water Produced by Reverse Osmosis: Effect of Sample Pre-treatment and Bacterial Inoculum

et al. 2020

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Measuring bacterial growth potential (BGP) involves sample pre-treatment and inoculation, both of which may introduce contaminants in ultra-low nutrient water (e.g., remineralized RO permeate). Pasteurization pre-treatment may lead to denaturing of nutrients, and membrane filtration may leach/remove nutrients into/from water samples. Inoculating remineralized RO permeate samples with natural bacteria from conventional drinking water leads to undesired nutrient addition, which could be avoided by using the remineralized RO permeate itself as inoculum. Therefore, this study examined the effect of pasteurization and membrane filtration on the BGP of remineralized RO permeate. In addition, the possibility of using bacteria from remineralized RO permeate as inoculum was investigated by evaluating their ability to utilize organic carbon that is readily available (acetate, glucose) or complex (laminarin, gelatin, and natural dissolved organic carbon), as compared with bacteria from conventional drinking water. The results showed that membrane filtration pre-treatment increased (140-320%) the BGP of remineralized RO permeate despite the extensive soaking and flushing of filters (>350 h), whereas no effect was observed on the BGP of conventional drinking water owing to its high nutrient content. Pasteurization pre-treatment had insignificant effects on the BGP of both water types. Remineralized RO permeate bacteria showed limitations in utilizing complex organic carbon compared with bacteria from conventional drinking water. In conclusion, the BGP bioassay for ultra-low nutrient water (e.g., remineralized RO permeate) should consider pasteurization pre-treatment. However, an inoculum comprising bacteria from remineralized RO permeate is not recommended as the bacterial consortium was shown to be limited in terms of the compounds they could utilize for growth.

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Section: Effect Of Sample Pre-treatment On Bgpmentioning

confidence: 99%

Measuring Bacterial Growth Potential of Ultra-Low Nutrient Drinking Water Produced by Reverse Osmosis: Effect of Sample Pre-treatment and Bacterial Inoculum

et al. 2020

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“…Additionally, studies of the feces of Asellus aquaticus have indicated that the feces leach organic acids, among other, biopolymers, which seems to support regrowth of bacteria [4,5].…”

Section: Macroinvertebrates As Hosts For Harmful Bacteriamentioning

confidence: 99%

“…Water quality is influenced by the development of biofilms embedded with harmful bacteria, as well as species diversity, abundance, biomass, and deposition of water lice feces pellets. Accordingly, large increases in invertebrate abundance leads to increases in crude and fine particulate organic matter (POM; this means living animals and their feces, and dead animals) and increases in microbe abundance [4,5]. Indeed, this influences the biological stability of drinking water [6,7] as well as biological drinking water quality [8].…”

Section: Introductionmentioning

confidence: 99%

Water Lice and Other Macroinvertebrates in Drinking Water Pipes: Diversity, Abundance and Health Risk

Gunkel

Michels²,

Scheideler³

2021

Water

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Activities to ensure and maintain water quality in drinking water networks, including flushing, are presented after standardized hydrant sampling combined with a stainless-steel low pressure–high flow rate (NDHF) filter and a 100 µm mesh size was used to separate pipe inhabitants. A databank of more than 1000 hydrant samples in European lowland areas was developed and used to analyze the diversity and abundance of macroinvertebrates in drinking water networks. Load classes for water louse (Asellus aquaticus) and oligochaetes are given with three evaluation classes: normal colonization, increased colonization, and mass development. The response of Asellus aquaticus in drinking water networks to environmental conditions are presented as are their growth and reproduction, promotion of a third generation by climate change effects, food limitations, and the composition and stability of their feces. Finally, the health risks posed by dead water lice and water lice feces with bacterial regrowth and the promotion of microbe development on house filters are analyzed.

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“…Terry & Summers (2018) reported that AOC accounted for only 30% of biodegradable DOC. In addition, P17 and NOX are unable to assimilate some biodegradable substances (Sack et al 2011;Hijnen et al 2018;Schurer et al 2019). As the TCC could indicate all cells present in the water, the apparent growth yields based on the standard AOC could be potentially overestimated.…”

Section: Aoc Consumption and Microbial Regrowth Potential In The Annular Reactors Receiving Effluents From Different Treatment Stepsmentioning

confidence: 99%

Characterization of microbial regrowth potential shaped by advanced drinking water treatment

et al. 2021

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Microbial regrowth in premise plumbing is a threat to water safety. Disinfectant residuals are often diminished during water transportation and stagnation, leading to the regrowth of opportunistic pathogens. Although microbial regrowth potential is mostly determined by water treatment, little is known about how each treatment step affects two key factors that contribute to microbial regrowth potential: biodegradable organic matter and microbial abundance. In this study, we operated annular reactors to evaluate the microbial regrowth potential of water shaped after each treatment step in a full-scale drinking water treatment plant with ozonation and biological activated carbon filtration. The assimilable organic carbon and total cell count (TCC) were stable at all treatment steps during the sampling period from July to October 2015. The assimilable organic carbon consumption and TCC net increase in the annular reactors indicated that apparent growth yields (cell number base) of microbial communities were different in each reactor. Regrowth potential evaluated by indigenous microbial community in finished water was reduced to 22% of that in raw water, while 75% of assimilable organic carbon in raw water remained in finished water. It suggested that treatment performance evaluated by indigenous microbial communities was better than that evaluated by assimilable organic carbon.

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Slowly biodegradable organic compounds impact the biostability of non-chlorinated drinking water produced from surface water

Cited by 46 publications

References 44 publications

Measuring Bacterial Growth Potential of Ultra-Low Nutrient Drinking Water Produced by Reverse Osmosis: Effect of Sample Pre-treatment and Bacterial Inoculum

Measuring Bacterial Growth Potential of Ultra-Low Nutrient Drinking Water Produced by Reverse Osmosis: Effect of Sample Pre-treatment and Bacterial Inoculum

Water Lice and Other Macroinvertebrates in Drinking Water Pipes: Diversity, Abundance and Health Risk

Characterization of microbial regrowth potential shaped by advanced drinking water treatment

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