Performance of a system combining aerated lagoons and waste stabilization ponds in a temperate climate

2000 ◽  
Vol 42 (10-11) ◽  
pp. 23-34 ◽  
Author(s):  
T. Nameche ◽  
O. Dufayt ◽  
H. El Ouarghi ◽  
J.L. Vasel
Keyword(s):  
High Efficiency ◽  
Treatment Plant ◽  
Organic Load ◽  
Temperate Climate ◽  
Absolute Difference ◽  
Waste Stabilization Ponds ◽  
Mean Absolute Difference ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Components Analysis

AbstractThe Bertrix wastewater treatment plant was designed and built for experimental purposes, especially for comparing aerated lagoons and stabilization ponds in a temperate climate. This plant was designed for a capacity of 7500 inhab. eq, and aerated lagoons were dimensioned to eliminate 50% of the organic load. The remaining load has to be degraded in the series of stabilization ponds. In this paper we shall present the plant in more detail and the results of a 3-year study, i.e., 79 rounds of samples for each of the five ponds under study, placing emphasis on the performances of aerated lagoons and stabilization ponds. Principal components analysis (of inflow and outflow) of aerated lagoons and stabilization ponds will be presented and commented on. The most important factors are the hydraulic loading and the concentrations. Seasonal variations appear only in the basins' temperatures. The fates of nitrogen compounds are quite different from those of organic compounds, confirming that a high efficiency of nitrogen removal is difficult to achieve, especially for short residence times (less than eight days). A few other conclusions of our study are given below: The ponds' hydrodynamics has been studied and a mathematical model is now available If there is no stratification in the ponds, a thermal model can be proposed where the mean absolute difference is 0.7°C±0.2. In the system under study, the contribution of algal biomass to the system is very small.

Waste stabilization ponds in France: a report on fifteen years experience

1995 ◽  
Vol 31 (12) ◽  
pp. 91-101 ◽  
Author(s):  
Y. Racault ◽  
C. Boutin ◽  
A. Seguin
Keyword(s):  
Load Level ◽  
Organic Load ◽  
Nitrogen And Phosphorus ◽  
Waste Stabilization Ponds ◽  
Sewerage System ◽  
System Type ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Output Load

In 1992, a survey was conducted on the performance of waste stabilization ponds in France. The data selected come from a sample of 178 ponds, with an average capacity of 600 p.e., throughout France. For each plant, one or several input--output load measurements over a 24-h period are available. The average organic load level received is approximately 25 kg BOD/ha.d, representing 50% of the nominal load. The quality of the treated water is presented based on the type of sewerage system feeding the ponds. The results appear dispersed, however; in 70% of the cases the concentrations in COD and BOD on filtered samples are under 120 mg/l and 40 mg/l, respectively, and the concentration in TSS under 120 mg/l (discharge standards in France for waste stabilization ponds). The reductions in nitrogen and phosphorus nutrients are on average from 60% to 70%. The influence of different parameters (sewerage system type, organic load, season, age of plant, etc.) was studied. The results appear noticeably worse when the ponds receive wastewater from a strictly separate sewerage system.

scholarly journals Suspended solids settling and half removal time in stabilization ponds (Tunisia)

2011 ◽  
Vol 24 (1) ◽  
pp. 53-61
Author(s):  
Kôkôh Rose Effebi ◽  
Chema Keffala ◽  
Jean Luc Vasel
Keyword(s):  
Suspended Solids ◽  
Treatment Plant ◽  
Treatment Center ◽  
Waste Stabilization Ponds ◽  
Removal Time ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Making A Difference ◽  
Sampling Systems ◽  
Settling Process

Settling is one of the processes occurring in waste stabilization ponds (WSP). Part of suspended solids (SS) is removed by sedimentation but very often the efficiency of WSP is presented without making a difference between settling and biological processes. In this way the WSP is seen as a black box process. This work presents an experimental approach to the study of the removal of wastewater suspended solids in a test column in order to improve our knowledge of the settling process in ponds. These results show that the settling test in columns can be used to estimate the half removal time (t50) for the study of settling characteristics of suspended solids in wastewater stabilization ponds. The aim of this study was to determine the half removal time (t50) in anaerobic, facultative and maturation ponds, and in the influent to these ponds, at the experimental wastewater treatment plant of CERTE (Recycling and Treatment Center of Wastewater in Tunisia), by a column settling test. The experiments lasted between 15 and 120 min. The column was 2 m high with sampling systems at various depths: 40, 80, 120, 160 and 200 cm. Half-removal suspended solids time t50 was defined as the time at which 50% of SS was removed. Models derived from the scientific literature were used to interpret the experimental data. The experimental results demonstrated that higher suspended solids concentrations in the influent led to shorter t50 values and better settling.

Comparative design and performance analysis of three different in configuration waste stabilization ponds pilot units in a Mediterranean-temperate climate

2003 ◽  
Vol 3 (4) ◽  
pp. 193-200 ◽  
Author(s):  
G.A. Parissopoulos ◽  
A. Papadopoulos ◽  
F. Papadopoulos ◽  
A. Karteris
Keyword(s):  
Warm Period ◽  
Temperate Climate ◽  
Waste Stabilization Ponds ◽  
Natural Systems ◽  
Effluent Quality ◽  
Stabilization Ponds ◽  
Treated Effluent ◽  
Waste Stabilization ◽  
Slow Sand Filter ◽  
And Performance

The performance of three waste stabilization ponds (WSP) treatment units (lines A, B, C) for a period of two years is presented. The above units were part of a research and demonstration project in North Greece concerning wastewater treatment with natural systems and effluent reuse for irrigation. Line A consisted of a deep anaerobic pond followed by a facultative and two maturation ponds. The anaerobic pond supplied with 120 m3/d was also feeding line B at a ratio 1:3 (line A: line B). Line B had the same design features with line A but with a recirculation of effluent. The third unit fed with primary treated effluent at a rate of 50m3/d from the WWTP of Thessaloniki was consisted of a facultative and two maturation ponds. In the anaerobic pond the BOD5, COD, SS, TC and FC mean reduction was 28%, 42%, 58%, 31% and 36% for the cold period (T<10°C) and 45%, 53%, 72%, 67% and 71% for the warm period (T>10°C) respectively. In line A, the BOD5, COD, SS, TC and FC total reduction was 98%, 89%, 93%, 99.99% and 99.99% for the cold and 98%, 85%, 88%, 99.99% and 99.99% for the warm period. In line B the reduction was 92%, 86%, 88%, 98.5% and 98.82% for the cold and 96%, 88%, 83%, 99.95% and 99.97% for the warm period. In line C the reduction of the same parameters was 92%, 64%, 40%, 99.88% and 99.96% for the cold and 92%, 59%, 22%, 99.99% and 99.99% for the warm period. The effluent quality was further improved with the use of a storage reservoir and a slow sand filter and reused successfully for crop irrigation.

scholarly journals Hydro-biological characterization and efficiency of natural waste stabilization ponds in a desert climate (city of Assa, Southern Morocco)

2021 ◽  
Author(s):  
Badre Achag ◽  
Hind Mouhanni ◽  
Abdelaziz Bendou
Keyword(s):  
Principal Component ◽  
Water Clarity ◽  
Organic Load ◽  
Low Oxygen ◽  
Rapid Urbanization ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Physico Chemical ◽  
The City

Abstract The city of Assa is located in a Saharian area characterized by an arid climate and water scarcity. Like any other Saharian city in a developing country, the city is facing the challenges of rapid urbanization and the need to improve wastewater treatment and management. The main objective of this work is to assess the performance of waste stabilization ponds in an arid area. This evaluation concerns microbiological and physico-chemical monitoring over three and twelve months respectively. Microbiological results indicate bacterial elimination rates of over 90% in autumn–winter due to the effectiveness of facultative ponds with 20–25 days of retention time, water clarity, ponds depth, and high sunlight exposure and penetration. Physico-chemical parameters surpass the Moroccan standards for reuse except Ph and T0 by 20–30%, this wastewater is relatively loaded with various pollutants, especially high organic load and low oxygen content. Statistical analysis has been made by principal component analysis (PCA), and confirms that dissolved oxygen, total suspended solids, COD and BOD5 do not reach the threshold for discharge into the natural environment, and moreover their reuse. For the improvement of the quality of these waters, it is legitimate to provide an upgrade of this plant by a tertiary treatment with maturation ponds.

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.

scholarly journals Performance evaluation of waste stabilization ponds on removal of Listeria spp.: a case study of Isfahan, Iran

2018 ◽  
Vol 16 (4) ◽  
pp. 614-621
Author(s):  
Atefeh Taherkhani ◽  
Hossein Movahedyan Attar ◽  
Seyyed Abbas Mirzaee ◽  
Mehdi Ahmadmoazzam ◽  
Neemat Jaafarzadeh ◽  
...  
Keyword(s):  
Treatment Plant ◽  
Pcr Amplification ◽  
Total Coliform ◽  
Most Probable Number ◽  
Waste Stabilization Ponds ◽  
Probable Number ◽  
Selective Enrichment ◽  
Stabilization Ponds ◽  
Sampling Locations ◽  
Waste Stabilization

Abstract The aim of the present study was to assess performance of waste stabilization ponds (WSPs) on the removal of Listeria spp. in Isfahan, Iran. A total of 104 samples were taken from eight sampling locations from influent and effluent of a wastewater treatment plant (WWTP). Sewage samples were analyzed for the presence of Listeria spp. using selective enrichment protocol. Listeria isolates were also identified by biochemical and polymerase chain reaction (PCR) amplification. Listeria spp. was enumerated by a three tube most probable number (MPN) for total coliform counts (TC), fecal coliform counts (FC), total suspended solids (TSS), and total dissolved solids (TDS). In total, 54/104 (51.92%), 49/104 (47.11%), 36/104 (34.61%), and 27/104 (25.95%) samples were positive for Listeria spp., L. monocytogenes, L. innocua, and L. seeligeri, respectively. The mean MPN/100 mL enumeration of L. monocytogenes for influent, anaerobic, facultative ponds 1, 2, 3, 4 and maturation ponds 1 and 2 were 21.54, 10.61, 8, 5.77, 4, 2.54, 1.38, and 0.46, respectively. The removal percentage of Listeria spp. in the anaerobic, facultative, and maturation ponds were 44.71, 76.5, and 81.4%, respectively. Results showed that the WSPs were able to decrease the Listeria spp. levels significantly, although unable to remove them completely.

Pour-flush toilets and waste stabilization ponds in a refugee camp

Waterlines ◽  
1989 ◽  
Vol 8 (1) ◽  
pp. 2-4
Author(s):  
Leo Glensvig ◽  
Dorte Glensvig
Keyword(s):  
Refugee Camp ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization
Sign in / Sign up

Export Citation Format

Share Document