Influence of effluents from a Wastewater Treatment Plant on nutrient distribution in a coastal creek from southern Brazil

Santos, Isaac R.; Costa, Ronaldo Cataldo; Freitas, Ubiratan de; Fillmann, Gilberto

doi:10.1590/s1516-89132008000100019

Cited by 24 publications

(12 citation statements)

References 20 publications

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“…Ammonia, nitrate and PO 4 concentrations during the study regime did not meet the South African guidelines of 1.0, 1.5 and 1 mg/L, respectively, in treated sewage effluents 14. Nitrite like nitrate is a source of nutrient that could have adverse effects on aquatic ecosystems at elevated concentrations and has been set at 0–0.5 mg/L for no risk 22. The excessive nutrient concentrations at the DP may have influenced that obtained downstream of receiving water bodies.…”

Section: Discussionmentioning

confidence: 95%

“…Nitrogen in the form of ammonia and nitrate as well as phosphorous are important to plant life, but have also been identified as pollutants, especially when found in excess. Large concentrations tend to stimulate excessive growth and lead to the proliferation of toxic algal blooms and eutrophication related problem 22. The South African water quality guidelines for aquatic ecosystems 23 states that the level of phosphate in water systems that will hinder eutrophication and prevent the growth of algae and other plants is 5 µg/L.…”

Section: Discussionmentioning

confidence: 99%

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Surveillance of Invasive Bacterial Pathogens and Human Enteric Viruses in Wastewater Final Effluents and Receiving Water Bodies – a Case Study from Durban, South Africa

Olaniran

Naidoo

Pillay

2012

CLEAN Soil Air Water

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The physico-chemical characteristics and microbial composition of the final effluents of two municipal wastewater treatment plants in South Africa were assessed between July and September 2009. The impact of the treated final effluents on the receiving water bodies was also evaluated. The temperature across all sampling points ranged between 14 and 228C, while pH varied from 6.9 to 7.6. High levels of turbidity, chemical oxygen demand (COD), ammonia, nitrate, nitrite and orthophosphate (PO 4 ) were observed in many cases. Turbidity of the samples was in the range of 2.2-288.6 NTU. The concentrations (mg/L) of other physico-chemical parameters are as follows: COD (9.33-289); ammonia (0.000340-45.4); nitrate (0.062-539); nitrite (0.021-22.6); PO 4 (5.3-33.2). The microbial quality of the effluents discharged from the plants did not comply with the limits set by the South African guidelines with respect to pathogens such as Salmonella, Shigella, Escherichia coli, total coliform, faecal coliform, enterococci, faecal streptococci, and viral particles for effluents intended for discharge into receiving watersheds. This study revealed an undesirable impact on the physico-chemical and microbial qualities of the receiving water bodies as a result of the discharge of inadequately treated effluents from the wastewater treatment facilities. This poses a health risk to several rural communities which rely on the receiving water bodies primarily as their sources of domestic water and recreational purposes. There is therefore a need for the intervention of appropriate regulatory agencies in South Africa to ensure compliance of treatment facilities with wastewater effluent quality standards.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Surveillance of Invasive Bacterial Pathogens and Human Enteric Viruses in Wastewater Final Effluents and Receiving Water Bodies – a Case Study from Durban, South Africa

Olaniran

Naidoo

Pillay

2012

CLEAN Soil Air Water

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“…Regarding the ED site, where the limnological variables indicator of organic pollution has presented the highest values, including the concentration of nutrients, it was observed a greater relative contribution of the classes Chlorophyceae turbidity, TSS, and alkalinity. Water bodies that receive discharges of domestic organic waste present higher values of these variables, which are good indicators of pollution for this type of waste (Camargo et al, 1995;Henry-Silva and Camargo, 2000;Santos et al, 2008). Despite the values of these variables had been statistically greater, the ED and TR sites had similar limnological characteristics.…”

Section: Discussionmentioning

confidence: 98%

Periphytic algal biomass in two distinct regions of a tropical coastal lake

Almeida

Fernandes

2012

Acta Limnol. Bras.

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AIM: This study assessed the phycoperiphyton biomass in two regions submitted to different human impacts on Juara Lake, a coastal ecosystem with multiple uses, to order to test the hypothesis that the sampling sites that receive domestic sewage shows higher biomass values. METHODS: It was installed three experimental structures with artificial substrate (glass slides) in December 2009 in two sampling sites: ED - near the domestic sewage's release; TR - in the area of intensive fish farming (net cages). Samplings were conducted in each experimental structure, after 21, 26 and 31 days for colonization. We evaluated: transparency, electric conductivity, pH, turbidity, total suspended solids, alkalinity, dissolved oxygen, water temperature, total nitrogen, nitrate, nitrite, ammonia nitrogen, total phosphorus, orthophosphate and silicate. The phycoperiphyton was analyzed regarding biomass: biovolume (total and per class); pigments (chlorophyll-a and b and carotenoids) and phaeophytin; dry weight and ash-free dry weight. RESULTS: TR featured higher values of transparency, water temperature and silicate. ED presented greater values of conductivity, turbidity, total suspended solids, alkalinity, total nitrogen, nitrate, ammonia nitrogen, and orthophosphate. No difference was detected between the sites and the succession of days for the dry weight, ash-free dry weight, chlorophyll-b, carotenoids, phaeopigments, and total biovolume. CONCLUSIONS: Nevertheless, the biovolume of Bacillariophyceae and Chlorophyceae were more representative in ED. Only the higher values of chlorophyll confirmed the hypothesis tested.

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“…S6 is located near a petrochemical pole with potential PAH contamination (Medeiros et al, 2005); the other two sites (S5 and S7) are located far from this source of contamination. S5 is located approximately 15 km distant from S6 in an area of the Vieira stream close to Wastewater Treatment Plant (WWTP) and close to a populated area (Santos et al, 2008). S7 is a channel located in the industrial complex but distant from urban areas and approximately 11 km distant from S6.…”

Section: Sampling Sitesmentioning

confidence: 99%

Responses of the CYP1A biomarker in Jenynsia multidentata and Phalloceros caudimaculatus and evaluation of a CYP1A refractory phenotype

et al. 2016

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Influence of effluents from a Wastewater Treatment Plant on nutrient distribution in a coastal creek from southern Brazil

Abstract: The hypothesis that effluents treated through activated sludge process cause changes in nutrient biogeochemistry of receiving water bodies was investigated in

Cited by 24 publications

References 20 publications

Surveillance of Invasive Bacterial Pathogens and Human Enteric Viruses in Wastewater Final Effluents and Receiving Water Bodies – a Case Study from Durban, South Africa

Surveillance of Invasive Bacterial Pathogens and Human Enteric Viruses in Wastewater Final Effluents and Receiving Water Bodies – a Case Study from Durban, South Africa

Periphytic algal biomass in two distinct regions of a tropical coastal lake

Responses of the CYP1A biomarker in Jenynsia multidentata and Phalloceros caudimaculatus and evaluation of a CYP1A refractory phenotype

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