01 and salmonellae removal compared with the die-off of faecal indicator organisms in waste stabilization ponds in Northeast Brazil

1995 ◽  
Vol 31 (12) ◽  
Keyword(s):  
Northeast Brazil ◽  
Indicator Organisms ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization

The Removal of Excreted Bacteria and Viruses in Deep Waste Stabilization Ponds in Northeast Brazil

1986 ◽  
Vol 18 (10) ◽  
pp. 31-35 ◽  
Author(s):  
J. I. Oragui ◽  
T. P. Curtis ◽  
S. A. Silva ◽  
D. D. Mara
Keyword(s):  
Clostridium Perfringens ◽  
Retention Time ◽  
Northeast Brazil ◽  
Depth Range ◽  
Faecal Coliforms ◽  
Pathogen Removal ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Faecal Streptococci

The removal of excreted bacteria (faecal coliforms, faecal streptococci, Clostridium perfringens, total and sorbitol-fermenting bifidobacteria, salmonellae and thermophilic campylobacters) and viruses (enterovirus and rotavirus) in a series of deep anaerobic, facultative and maturation ponds (depth range: 2.8 - 3.4 m), with an overall retention time of 21 days and a mean mid-depth temperature of 27°C, was studied. Thermophilic campylobacters, bifidobacteria and salmonellae were not detected after 11, 16 and 21 days' retention respectively. Faecal coliforms, faecal streptcocci and Cl. perfringens were reduced by 4, 4 and 2 orders of magnitude respectively, and enteroviruses and rotaviruses both by 3 orders. The results indicate that pathogen removal in deep ponds is similar to that in ponds of normal depth.

The Removal of Excreted Bacteria and Viruses in Deep Waste Stabilization Ponds in Northeast Brazil

1987 ◽  
Vol 19 (3-4) ◽  
pp. 569-573 ◽  
Author(s):  
J. I. Oragui ◽  
T. P. Curtis ◽  
S. A. Silva ◽  
D. D. Mara
Keyword(s):  
Clostridium Perfringens ◽  
Retention Time ◽  
Northeast Brazil ◽  
Depth Range ◽  
Faecal Coliforms ◽  
Pathogen Removal ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Faecal Streptococci

The removal of excreted bacteria (faecal coliforms, faecal streptococci, Clostridium perfringens, total and sorbitol-fermenting bifidobacteria, salmonellae and thermophilic campylobacters) and viruses (enterovirus and rotavirus) in a series of deep anaerobic, facultative and maturation ponds (depth range: 2.8 - 3.4 m), with an overall retention time of 21 days and a mean mid-depth temperature of 27°C, was studied. Thermophilic campylobacters, bifidobacteria and salmonellae were not detected after 11, 16 and 21 days' retention respectively. Faecal coliforms, faecal streptcocci and Cl. perfringens were reduced by 4, 4 and 2 orders of magnitude respectively, and enteroviruses arid rotaviruses both by 3 orders. The results indicate that pathogen removal in deep ponds is similar to that in ponds of normal depth.

scholarly journals Performance evaluation and coefficients of reliability for waste stabilization ponds in northeast Brazil

2021 ◽  
Vol 16 (1) ◽  
pp. 1
Author(s):  
Matheus Sales Alves ◽  
Fernando José Araújo da Silva ◽  
André Luís Calado Araújo ◽  
Erlon Lopes Pereira
Keyword(s):  
Northeast Brazil ◽  
Concentration Data ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Normal Probability ◽  
Thermotolerant Coliforms ◽  
Normal Probability Distribution ◽  
Log Normal ◽  
Domestic Effluent

This paper assesses the reliability of Waste Stabilization Ponds (WSP) and proposes an alternative approach to WSP design based on the calculation of coefficient of reliability (COR) from an acceptable measure of violation of discharge standards. For that, data were collected from 10 full-scale systems operating in Northeast Brazil. All systems receive predominantly domestic effluent and are composed of one facultative pond and two serial maturation ponds. Different levels of restriction for effluent discharge were considered regarding the parameters: BOD, COD, total suspended solids, ammonia and thermotolerant coliforms. The Log-normal Probability Distribution Function (PDF) was able to represent the behavior of the concentration data in the effluent and, therefore, allowed the COR calculation. The COR was obtained from the coefficient of variation (CV) of the concentrations and the standardized normal variable associated with a 95% probability of non-exceedance. The observed dispersion of the results proved to be detrimental to the adoption of a single COR value for the evaluated parameters. In addition, the comparison between observed and design/operational concentration for optimal performance showed that the 95% reliability scenario represents a less achievable target for WSP systems.

Vibrio cholerae O1 (El Tor) removal in waste stabilization ponds in northeast Brazil

1993 ◽  
Vol 27 (4) ◽  
pp. 727-728 ◽  
Author(s):  
J.I. Oragui ◽  
Helen Arridge ◽  
D.D. Mara ◽  
H.W. Pearson ◽  
S.A. Silva
Keyword(s):  
Vibrio Cholerae ◽  
Northeast Brazil ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Vibrio Cholerae O1 ◽  
El Tor

Canal networks as extended waste stabilization ponds: fate of pathogens in constructed waterways in Pathumthani Province, Thailand

2007 ◽  
Vol 55 (11) ◽  
pp. 143-156 ◽  
Author(s):  
A.J. Anceno ◽  
M. Ozaki ◽  
Y.N.D. Dang ◽  
B. Chuluun ◽  
O.V. Shipin
Keyword(s):  
Treatment Plant ◽  
Local Context ◽  
Indicator Organisms ◽  
Probability Models ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Canal Networks ◽  
Pathogen Occurrence ◽  
Established Infection

The occurrence and fate of surface water and wastewater pathogens (faecal coliforms, Escherichia coli, Giardia lamblia and Cryptosporidium parvum) in two constructed waterways and a pond-based AIT wastewater treatment plant (AIT WWTP) in Pathumthani, Thailand were studied in the context of several biogeochemical factors and in relation to pollutional pressure and seasonal phenomena with a view to proposing potential mechanisms for their removal. More data on pathogen removal in a given local context would provide assurance that some pathogens could serve as suitable indicator organisms and predict removal of different pathogenic microorganisms such as protozoan parasites covered in this study. The enumeration technique for protozoan pathogens was improved in terms of application of emerging novel molecular technologies for the development of a fast but affordable microbiological method. Potential risk of waterborne disease outbreak in pertinent communities was then characterized using established infection probability models and the compiled pathogen occurrence data. Overall, we have addressed several strategic priorities of pathogen research in waste stabilization ponds in developing tropical countries like Thailand.

Microorganism Removal in Waste Stabilization Ponds in Portugal

1987 ◽  
Vol 19 (12) ◽  
pp. 141-144 ◽  
Author(s):  
M Jenny do Nascimento
Keyword(s):  
Removal Efficiency ◽  
Waste Treatment ◽  
Treatment Plant ◽  
Biological Indicators ◽  
Indicator Organisms ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Waste Treatment Plant ◽  
Microorganism Removal

This study has evaluated the removal of traditional biological indicators of faecal pollution and two new indicators: Pseudomonasaeruginosa and Clostridiumperfringens in waste stabilization ponds which were installed at the waste treatment plant of Loures, at Frielas, near Lisbon. The removal efficiency for indicator organisms was 10/100 ml in the anaerobic pond A1, except for one of them, and less in A2. In facultative ponds the removal was 10/100 ml while in maturation pond M2 the removal efficiency was higher for traditional indicators than for the new indicators; in pond Ml the removal was less than in M2.

Vibrio cholerae 01 and salmonellae removal compared with the die-off of faecal indicator organisms in waste stabilization ponds in northeast Brazil

1995 ◽  
Vol 31 (12) ◽  
pp. 249-256 ◽  
Author(s):  
H. Arridge ◽  
J. I. Oragui ◽  
H. W. Pearson ◽  
D. D. Mara ◽  
S. A. Silva
Keyword(s):  
Vibrio Cholerae ◽  
Northeast Brazil ◽  
Indicator Organisms ◽  
Faecal Coliforms ◽  
Waste Stabilization Ponds ◽  
Sulphide Concentration ◽  
Waste Stabilization ◽  
Vibrio Cholerae O1 ◽  
Survival Studies ◽  
Faecal Streptococci

Vibrio cholerae O1 was reduced from 40 per litre to zero after 5-10 days, and salmonellae from 130-470 per 100 ml to 1-2 per 100 ml after 13-16 days. Faecal coliforms were better indicators of these bacterial pathogens than were faecal streptococci or Clostridium perfringens, and FC numbers of 1000 per 100 ml were associated with an absence of V. cholerae and 1-2 salmonellae per 100 ml. In-pond survival studies indicated that significant removal of V. cholerae occurs when the sulphide concentration is ≥ 3 mgl-1, thus indicating the need to include anaerobic ponds.

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