Biologically mediated corrosion and its effects on water quality in distribution systems

Lee, Sai Hyun; O’Connor, John T.; Banerji, Samir K.

doi:10.1002/j.1551-8833.1980.tb04600.x

Cited by 75 publications

(37 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ultrastructural features of the surface matrixes were very similar to those reported for other municipal distribution systems (1,8,14,18). Moreover, the occurrence of bacteria within surface encrustations of Springfield's biofilms is consistent with prior findings (1,9,13,19). Unique to the present study is the presence of fungal spores as a major component of surface biofilms and encrustations.…”

supporting

confidence: 86%

Characterization of Fungal Biofilms within a Municipal Water Distribution System

2000

Appl Environ Microbiol

139

View full text Add to dashboard Cite

Biofilms of a municipal water distribution system were characterized to assess the occurrence of fungi within surface matrixes. Densities of filamentous fungi ranged from 4.0 to 25.2 CFU cm ؊2 , whereas yeast densities ranged from 0 to 8.9 CFU cm ؊2 . Observations by scanning electron microscopy further suggested that spores, not hyphae or vegetative cells, comprised the primary source of viable propagules.The presence of fungi in drinking water and within biofilms of distribution systems has received limited attention. This is due, in part, to the fact that causal relationships between fungal occurrence and water quality remain uncertain. Nonetheless, waterborne fungi are likely associated with taste and odor problems, contamination in food and beverage preparation, and a variety of health-related effects (3,5,10,17). Uncertain ramifications of fungi in potable water have led to a limited number of investigations which show that fungi are present in a significant proportion of tap water samples; however, species abundance and diversity are extremely variable (6,11,13,16). This variation is often attributed to factors such as raw water source, water temperature patterns, treatment conditions, and maintenance of distribution systems (5). The nature and extent of fungi within distribution biofilms remain more obscure; only a single report has demonstrated conclusively that fungi are an integral biofilm component (12). Although it is assumed that contamination is attributable to spore deposition within the biofilm matrix, there is limited evidence to support this premise.Pipe surfaces were collected from the Springfield, Mo., water distribution system from March to July 1997. This municipal system serves approximately 100,000 people and consists of over 900 miles of water mains. Physical and chemical characteristics of this distribution system from January to July 1997 are reported in Table 1. Each sample consisted of a single pipe coupon (i.e., a longitudinal section of the inner pipe surface) obtained during routine maintenance and extension of 30-in. mains. During collection, each coupon was carefully rinsed with 2 liters of sterile distilled water and then placed in a sterile plastic bag. Coupons were immediately transported to the laboratory and rinsed again with 1 liter of sterile distilled water. The purpose of each rinse was to minimize the likelihood of contamination by airborne spores. Although each rinse was discarded, preliminary investigations of polyvinyl chloride (PVC) and iron coupons indicated that rinses did not remove biofilm deposition.Small biofilm fragments, each consisting of 0.5 cm 2 of surface matrix, were removed and plated on the following nonselective media: potato dextrose agar (Difco), Czapek solution agar (Difco), cornmeal agar (Difco), Sabouraud dextrose agar (Difco), and YMPG (10 g of dextrose, 5 g of neopeptone, 3 g of yeast extract, 3 g of malt extract, 10 g of agar, 1 liter distilled water). Four replicates of each medium were employed for each coupon to yield a total of 100 frag...

show abstract

supporting

confidence: 86%

Characterization of Fungal Biofilms within a Municipal Water Distribution System

2000

Appl Environ Microbiol

139

View full text Add to dashboard Cite

show abstract

“…In contrast to nitrification, the occurrence and impact of denitrification has received relatively little study and detection of denitrifying bacteria has rarely been reported in distribution pipelines (Lee et al, 1980). Generally, denitrifiers are assumed to be essentially irrelevant to potable water systems, residing only deep within iron pipe scale (Zhu et al, 2014).…”

Section: Introductionmentioning

confidence: 98%

Redox gradients in distribution systems influence water quality, corrosion, and microbial ecology

et al. 2015

View full text Add to dashboard Cite

“…Although the results show that oxygen concentration is steadily decreasing in time, and therefore iron release and pH are increasing. In practice the corrosion rate is also influenced not only by the so-called secondary reactions but also by many other reactions (e.g., disinfectant decay) or even microorganisms (Lee et al, 1980). The current study focuses on the primary reactions only.…”

Section: -D and 2-d Models Resultsmentioning

confidence: 99%

A 2-D transient multicomponent simulation model: Application to pipe wall corrosion

Naser

Karney

2007

Journal of Hydro-environment Research

View full text Add to dashboard Cite

Biologically mediated corrosion and its effects on water quality in distribution systems

Cited by 75 publications

References 18 publications

Characterization of Fungal Biofilms within a Municipal Water Distribution System

Characterization of Fungal Biofilms within a Municipal Water Distribution System

Redox gradients in distribution systems influence water quality, corrosion, and microbial ecology

A 2-D transient multicomponent simulation model: Application to pipe wall corrosion

Contact Info

Product

Resources

About