Influence of inter-annual variations in climatic factors on fecal coliform levels in Mississippi Sound

Chigbu, Paulinus; Gordon, Scott; Strange, T.

doi:10.1016/j.watres.2004.08.019

Cited by 78 publications

(41 citation statements)

References 19 publications

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“…This calculation does not consider other factors that also lead to a decrease of FIB, like mortality rates of bacteria in natural aquatic systems, biotic factors like grazing by protozoan-plankton, or abiotic factors like the influence of sunlight on them (summed up under the term of "river self-purification"). Sunlight is the most important factor as it reduces FIB by one log within hours, as long as the turbidity of the water is low [22][23][24][25].…”

Section: Discussionmentioning

confidence: 99%

Impact of Combined Sewer Overflow on Wastewater Treatment and Microbiological Quality of Rivers for Recreation

Mascher

Pichler-Semmelrock

et al. 2017

Water

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Abstract:Within the framework of a one-year study the treatment capacity of a municipal wastewater treatment plant (WWTP) was evaluated, with regard to fecal indicator bacteria (FIB) and to their influence on the recipient. The logarithmic reduction rates for fecal coliforms (FC), Escherichia coli (EC) and intestinal enterococci (IE) were 2.84, 2.90 and 2.93. In the investigated period of time, the tested treatment plant released 4.3% of the total annual load flow volume as combined sewer overflow (CSO), that is, when the influent into the combined sewer exceeds the capacity of the treatment plant and coarsely cleaned wastewater arrives at the recipient. This CSO discharge increased the number of FIB significantly by 1.2 × 10 2 MPN/100 mL for EC, and by 1.8 × 10 1 MPN/100 mL for IE. For the Styrian part of the Mur River (1.6 million inhabitants), a calculation of FIB of all sewage treatment plants estimating the same ratio of CSO (4.3%) and a given mean flow rate (QM) results in a significant increase of the FIB load in the recipient: 3.8 × 10 3 MPN/100 mL for EC and 5.8 × 10 2 MPN/100 mL for IE. On the basis of these values the standards of water quality for recreational purposes cannot be met.

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Section: Discussionmentioning

confidence: 99%

Impact of Combined Sewer Overflow on Wastewater Treatment and Microbiological Quality of Rivers for Recreation

Mascher

Pichler-Semmelrock

et al. 2017

Water

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“…[15][16][17][21][22][23] The MSS is primarily a vertically well-mixed semienclosed estuary, also showing characteristics of a partially well-mixed estuary and locally a stratified estuary. 12 August-October is a low-inflow/high-salinity period and the persistent southerly and southeasterly winds and low discharge cause strong vertical stratification in the Mobile Bay and MSS.…”

Section: Introductionmentioning

confidence: 99%

Inflow of shelf waters into the Mississippi Sound and Mobile Bay estuaries in October 2015

Cambazoglu

Soto

Howden

et al. 2017

J. Appl. Remote Sens

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Abstract. The exchange of coastal waters between the Mississippi Sound (MSS), Mobile Bay, and Mississippi Bight is an important pathway for oil and pollutants into coastal ecosystems. This study investigated an event of strong and persistent inflow of shelf waters into MSS and Mobile Bay during October 2015 by combining in situ measurements, satellite ocean color data, and ocean model predictions. Navy Coastal Ocean Model predicted high-salinity shelf waters continuously flowing into the estuarine system and forecasted low-salinity waters trapped inside the estuaries which did not flush out until the passage of tropical cyclone Patricia's remnants in late October. The October 2015 chlorophyll-a anomaly was significantly low inside and outside the MSS for the 2003 to 2015 time series. Similar low-chlorophyll-a anomalies were only seen in 2003. The October 2015 mean in situ salinities were up to 8 psu higher than mean from 2007 to 2015, and some estuarine stations showed persistent salinities above 30 psu for almost a month in agreement with model predictions. October 2015 was associated with low fall seasonal discharge, typical of fall season, and wind which was persistently out of the east to southeast °. These persistent wind conditions were linked to the observed anomalous conditions. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…Climatic conditions infl uence the water temperature and salinity as well as promotes changes in coliform contamination levels in seawater and, consequently, marine products (CHIGBU et al, 2004). In addition to such factors, the water for this region includes less organic matter in the winter, which may also infl uence the bacterial biomass in the water and, consequently, oysters (MONTANHINI NETO et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

Microbiological quality assessment for oysters produced and traded in Paraná, Brazil

Montanhini¹,

Neto²

2015

Acta Alimentaria

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Oysters are fi lter-feeding bivalve molluscs that are associated with several foodborne illnesses, because they accumulate biotic and abiotic contaminants dispersed in the water. The state of Paraná in southern Brazil is distinguished by a high consumption of oysters, typically eaten raw, and this habit may present a risk to consumer health if the product is contaminated with pathogenic bacteria. This study intends to evaluate the microbiological quality of oysters produced and traded in Paraná, directly examining the localities of cultivation and trading of the product. The major sites for the trading of oysters in the state were identifi ed and 52 dozen oysters (624 animals) were collected from these places, between April and December, 2013. The samples were subjected to analyses for total coliforms, Escherichia coli, Staphylococcus aureus, and Salmonella spp. No samples had results of microbial contamination above the limits established by Brazilian legislation. This study indicated that the microbiological quality of the oysters produced and traded in the state of Paraná is acceptable.

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Influence of inter-annual variations in climatic factors on fecal coliform levels in Mississippi Sound

Cited by 78 publications

References 19 publications

Impact of Combined Sewer Overflow on Wastewater Treatment and Microbiological Quality of Rivers for Recreation

Impact of Combined Sewer Overflow on Wastewater Treatment and Microbiological Quality of Rivers for Recreation

Inflow of shelf waters into the Mississippi Sound and Mobile Bay estuaries in October 2015

Microbiological quality assessment for oysters produced and traded in Paraná, Brazil

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