Fecal coliform accumulation within a river subject to seasonally-disinfected wastewater discharges

Mitch, Azalea A.; Gasner, Katherine C.; Mitch, William A.

doi:10.1016/j.watres.2010.05.060

Cited by 40 publications

(14 citation statements)

References 17 publications

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“…Their proportion in the river and treated wastewaters was lower (0.01-0.02 % of the identified microorganisms), than was found in the untreated wastewaters (0.09 %). These data indicate that wastewater treatment is significantly reducing certain pathogenic organisms, and lack of treatment, or poor treatment, may be negatively affecting the safety of the river water by allowing high pathogen loads, (particularly in the summer), thus posing a potential risk to human health and contributing to overall surface water impairment (Mitch et al 2010). Metagenomics, based on high-throughput sequencing, is being increasingly used as a tool for analyzing microbial community function (Thomas et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Using high-throughput sequencing to assess the impacts of treated and untreated wastewater discharge on prokaryotic communities in an urban river

Bai

Liang

et al. 2013

Appl Microbiol Biotechnol

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In many megacities wastewater is an important source of surface water, particularly during drought periods. While changes in surface water chemistry associated with effluent inflow have generally been well-studied, few data have been collected on the effects to prokaryotic communities. The objective of this study was to explore the impacts of treated and untreated wastewater discharges on prokaryotic community in an urban river. High-throughput sequencing was conducted for analyzing the prokaryotic community composition and function in river water, treated wastewater and untreated wastewater. Results revealed that the prokaryotic community compositions in the upstream river reach were dominated by treated wastewater discharge. In the middle-and downstream river reaches, untreated effluent volumes are higher, thus affecting the structure of the prokaryotic community, promoting a rise in Cyanobacteria and Thaumarchaeota. Function annotation revealed a number of genes associated with xenobiotic metabolism and human diseases were observed in river and wastewater samples, suggesting wastewater discharge to river may pose a risk to human health. Quantitative realtime PCR results revealed that the treated and untreated wastewater discharges also affected the abundance of ammonia oxidation bacteria (AOB) and ammonia oxidation archaea (AOA) in river.

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Section: Discussionmentioning

confidence: 99%

Using high-throughput sequencing to assess the impacts of treated and untreated wastewater discharge on prokaryotic communities in an urban river

Bai

Liang

et al. 2013

Appl Microbiol Biotechnol

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“…These results imply that many pollutants flow into the sea area from the pollution sources, however, they are diluted within the buffer zone between the coastline and the designated area, and the bacteria are also reduced due to dilution, decay, or removal in the sea area. Similarly, the previous studies addressed that the reductions in FC concentrations within coastal water from wastewater outfalls were attributed to dilution or overall removal (Azalea et al 2010; Mok et al 2016). Chigbu et al (2005) reported that FC dynamics in coastal waters depends on the amount of bacterial loading from streams and rivers, water mixing and dispersion in receiving waters, and bacterial losses due to death and sedimentation.…”

Section: Resultsmentioning

confidence: 98%

Bacteriological quality evaluation of seawater and oysters from the Hansan-Geojeman area in Korea, 2011–2013: impact of inland pollution sources

et al. 2016

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From 2011 to 2013, we conducted a full sanitary survey of pollution sources in proximity to a shellfish growing area in the Hansan-Geojeman region in Korea, which includes a designated shellfish growing area. In the sea area, 1152 seawater and 209 oyster samples were collected and examined to evaluate their bacteriological quality. There were 758 potential pollution sources in the drainage area, including 40 sources discharging water in 2013. Fecal coliform (FC) concentrations and impact radii of discharges ranged from 1.8 to 700,000 MPN/100 mL and from 3 to 600 m, respectively; however, the pollutants did not reach the designated area. This demonstrates that the dilution of waste was sufficient such that no significant impact occurred within the designated shellfish growing area. The variation in the FC levels of seawater was closely related to season and rainfall. The FC levels of seawater and oysters from the designated area met the regulation limits set by various countries. No pathogens were found in any oysters. The results of the survey indicate that the oysters produced in this area are apparently safe for raw consumption based on their bacterial quality.

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“…Since farming activities are found around the watershed area of St. Margaret village, there is high chance of animal fecal contamination reaching the creeks during rainy season. Water quality monitoring is necessary for prevention of waterborne diseases and organisms such as Shigella and Salmonella are important indicator microorganisms in that exercise [10].…”

Section: Discussionmentioning

confidence: 99%

A Study of a Rudimentary Potable Water System in a Rural Community

Ake¹,

Waight²,

Romero³

et al. 2015

JWARP

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A comprehensive study was conducted to evaluate a rural community's efforts to solve its potable water problem. Residents of St. Margaret village has built a rudimentary water storage facility through their community efforts and run a network of water supply to the households of the village. The study analyzed the water quality of the reservoir for physical, chemical and microbiological parameters by using standard water quality measurements and compared it between the wet and the dry seasons. The results indicate that the temperature and the pH were highest in the month of April. The phosphate level was high during the month of November whereas the dissolved oxygen level was lowest during November. The presence of fecal coliforms and other pathogenic microbes such as Salmonella and Shigella suggested that the water bodies are not safe for human consumption. The survey of the households in the village also revealed that health ailments associated with gastrointestinal tract are common among the people using the water for drinking purpose. The community's effort in finding solution to their potable water problem has been demonstrated in the design and execution of the rudimentary reservoir in the St. Margaret village. Although majority of the inhabitants of the village have only primary-level education, they were able to carry out a major engineering project.

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Fecal coliform accumulation within a river subject to seasonally-disinfected wastewater discharges

Cited by 40 publications

References 17 publications

Using high-throughput sequencing to assess the impacts of treated and untreated wastewater discharge on prokaryotic communities in an urban river

Using high-throughput sequencing to assess the impacts of treated and untreated wastewater discharge on prokaryotic communities in an urban river

Bacteriological quality evaluation of seawater and oysters from the Hansan-Geojeman area in Korea, 2011–2013: impact of inland pollution sources

A Study of a Rudimentary Potable Water System in a Rural Community

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