Assessment of the Physicochemical Qualities and Prevalence of Escherichia coli and Vibrios in the Final Effluents of Two Wastewater Treatment Plants in South Africa: Ecological and Public Health Implications

Korba wastewater treatment plant is a conventional activated sludge followed by three maturation ponds (MP1, MP2, MP3) in series acting as a tertiary treatment. The first study of wastewater treatment plants showed that the effluent concentration of Escherichia coli and enterococci at the outlet of the (MP3) varies between 103 and 104CFU/100 ml. After the hydrodynamic study conducted by Rhodamine WT which showed short-circuiting in the MP1, two baffles were introduced in the first maturation pond (MP1) to improve the hydrodynamic and the sanitary performances. The second hydraulic study showed that the dispersion number ‘d’ was reduced from 1.45 to 0.43 by this engineering intervention and the Peclet number was raised from 0.69 to 2.32. The hydraulic retention time was increased by 14 h. Because of well-designed baffles, the removal efficiency of E. coli and enterococci was raised between 0.2 and 0.7 log units for the first maturation pond.

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Prevalence and Characterisation of Non-Cholerae Vibrio spp. in Final Effluents of Wastewater Treatment Facilities in Two Districts of the Eastern Cape Province of South Africa: Implications for Public Health

Wastewater and Public Health ◽

10.1201/b18649-4 ◽

2015 ◽

pp. 27-50 ◽

Cited By ~ 1

Author(s):

Anthony Okoh ◽

Timothy Sibanda ◽

Vuyokazi Nongogo ◽

Martins Adefisoye ◽

Osuolale Olayemi ◽

...

Keyword(s):

Public Health ◽

South Africa ◽

Wastewater Treatment ◽

Eastern Cape Province ◽

Eastern Cape ◽

Treatment Facilities ◽

Vibrio Spp

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Emerging Compounds in Mexico: Challenges for Their Identification and Elimination in Wastewater

10.5772/intechopen.93909 ◽

2020 ◽

Author(s):

José Gustavo Ronderos-Lara ◽

Hugo Saldarriaga-Noreña ◽

Pedro Guillermo Reyes-Romero ◽

Luis Alberto Chávez-Almazán ◽

Josefina Vergara-Sánchez ◽

...

Keyword(s):

Public Health ◽

Wastewater Treatment ◽

Wastewater Treatment Plants ◽

Industrial Applications ◽

Emerging Pollutants ◽

The Other ◽

Personal Hygiene ◽

Technological Infrastructure ◽

Emerging Compounds ◽

Concentration Levels

In recent years, the presence of organic pollutants has received great attention due to their effects on public health and biota. Within this set of compounds, a new range of compounds that are characterized by their high persistence and low degradation have been identified, called Emerging Compounds. Emerging pollutants include a wide variety of products for daily use of different structures, domestic and industrial applications, such as: pesticides, industrial and personal hygiene products, hormones, and drugs, most of which are toxic, persistent and bioaccumulative. A characteristic of these types of pollutants is that current wastewater treatment plants are unable to remove them; they are designed to remove organic matter and nutrients in higher concentrations. In Mexico there is little information on the concentration levels of these compounds, due to the lack of public policies aimed at providing resources to institutions and researchers trained to carry out this type of study. On the other hand, the technological infrastructure of the wastewater treatment plants is insufficient for the country’s demand. This situation represents one of the greatest challenges for the authorities responsible for the management of water resources, in the immediate time if it is intended to preserve said resource and therefore take care of the health of the population.

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