Research on Waste Stabilization Ponds in the United Kingdom: Sludge Accumulation in Pilot-scale Primary Facultative Ponds

2005 ◽  
Vol 26 (4) ◽  
pp. 449-458 ◽  
Author(s):  
K.L. Abis ◽  
D. Mara
Keyword(s):  
United Kingdom ◽  
Pilot Scale ◽  
Waste Stabilization Ponds ◽  
The United Kingdom ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Sludge Accumulation

Nitrogen removal in baffled waste stabilization ponds

1996 ◽  
Vol 33 (7) ◽  
pp. 173-181 ◽  
Author(s):  
S. Muttamara ◽  
U. Puetpaiboon
Keyword(s):  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Plug Flow ◽  
Specific Area ◽  
Pilot Scale ◽  
Bacterial Biofilm ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
N Removal ◽  
Waste Stabilization

This study evaluated nitrogen removal in Baffled Waste Stabilization Ponds (BWSPs) comprising laboratory and pilot-scale ponds with different number of baffles. The aim was to promote the waste stabilization pond practice for wastewater treatment in tropical countries by increasing nitrogen and organic carbon removal efficiency or reducing the land area requirement through the use of baffles which increased the biofilm biomass concentrations. The experiments started with a tracer study to find out the hydraulic characteristics of each pond. It was shown that the dispersion number decreased with increasing flow length and number of baffles which indicated more plug flow conditions. The deviation of actual HRT from theoretical HRT was computed and the flow pattern suggested the existence of an optimum spacing of baffles in BWSP units. The investigations further revealed that more than 65% TN and 90% NH3-N removal efficiencies were achieved at HRT of 5 days in a 6 baffled pond, which corresponds to the specific area of 34.88 m2m3. TN and NH3-N removal increased with increasing number of baffles in the BWSP units. Combined algal/bacterial biofilm grown on the baffles immersed in the ponds showed potential for increasing the extent of nitrification. COD removal increased with higher number of baffles with its maximum removal efficiency at 6 baffles. Compared with normal WSP, BWSP gave higher TN, NH3-N, COD and BOD5 removal efficiency. The effluent SS concentrations from the laboratory-scale 6 baffled pond were less than 20 mg/L at HRT of 3 days or more.

scholarly journals Enhancement of waste stabilization ponds efficacy using local fixed film materials

2007 ◽  
pp. 419-428
Author(s):  
R.M. Al-Sa 'ed ◽  
N. Mahmoud ◽  
A. Abu-Madi ◽  
O.R. Zimmo
Keyword(s):  
Organic Matter ◽  
Rural Areas ◽  
Low Cost ◽  
Domestic Wastewater ◽  
Pilot Scale ◽  
Fecal Coliforms ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
In Series

This paper evaluates the feasibility of using local rock filter as natural media in waste stabilization ponds, A pilot-scale algae-rock filter ponds (ARPs) system was investigated, in parallel with algae-based ponds (ABPs) over a period of 6 months to evaluate the treatment efficacy of both systems. Each system entailed 4 equal ponds in series and was continuously fed with domestic wastewater from Birzeit University. The removal rates of organic matter, nutrients and faecal coliforms were monitored within each treatment system. The results obtained revealed that ARPs system was more efficient in the removal of organic matter (TSS and COD; 86% and 84%, respectively) and fecal coliforms (4 log10) than ABPs (81%, 81%, 3 log10, respectively). Nitrogen was reduced in the ARPs to an average of24 mg N/1; in contrast the ABPs effluent contained 32 mg N/1. Compared to ABP system, passive aerated ARPs option is an efficient, a low-cost and land-saving alternative with effluent quality suitable for restricted agricultural use in rural areas.

Treatment of Wastewater by Stabilization Ponds – Application to Tunisian Conditions

1993 ◽  
Vol 28 (10) ◽  
pp. 193-199 ◽  
Author(s):  
A. Ghrabi ◽  
M. Ferchichi ◽  
C. Drakidès
Keyword(s):  
Sediment Accumulation ◽  
Domestic Wastewater ◽  
Pilot Scale ◽  
Total Coliform ◽  
Ammonia Nitrogen ◽  
Irrigation Season ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Domestic Wastewater Treatment ◽  
Waste Stabilization

An experimental study of the domestic wastewater treatment in a series of four pilot-scale stabilization ponds was conducted. The objective was to adapt the treatment by waste stabilization ponds (WSP) to Tunisian conditions. The obtained results show that the average values of removal are about 72% for BOD, 65% for COD and more than 50% for ammonia nitrogen. The phosphate concentration was influenced by release of phosphate from decomposition sediment The elimination of total coliform, faecal coliform and faecal streptococci is between 99.3% and 99.99%. The most rate reduction was registered during the warm months which coincide with the irrigation season. The sediment accumulation is taken mainly in the first pond: the deposition rate is high (5 cm/year). In the three maturation ponds, it ranges from 1.3 to 1.6 cm/year. The WSP can be designed to satisfy Tunisian conditions. Because of favourable climate, loading can be much higher than those reported in the literature and some of the disadvantages of the pond system can be reduced. So we can economize in evaporation of effluent which is considered as a resource of irrigation in agriculture and we can reduce the surface area.

Attached-Growth Waste Stabilization Pond Treatment Evaluation

1987 ◽  
Vol 19 (12) ◽  
pp. 229-235 ◽  
Author(s):  
H. K. Shin ◽  
Chongrak Polprasert
Keyword(s):  
Fecal Coliform ◽  
Suspended Solids ◽  
Pond Water ◽  
Pilot Scale ◽  
Growth Media ◽  
Waste Stabilization Ponds ◽  
Attached Growth ◽  
Stabilization Ponds ◽  
Control Units ◽  
Waste Stabilization

This study investigated the feasibi1ity of improving waste stabilization ponds (WSP) performance through the addition of attached-growth media in the pond water. An artificial media consisting of fine strings of polyvinylidene chloride was employed as an attached-growth media in the laboratory-scale and pilot-scale experiments. Better removal of organic, nutrient and suspended solids were obtained in the attached-growth waste stabilization ponds (AGWSP). The AGWSP were found to be rather stable against increased hydraulic loadings. However, the fecal coliform die-off in the AGWSP units were not significantly different from those of the control units without attached-growth media.

Faecal coliform die-off in wastewater storage and treatment reservoirs

2000 ◽  
Vol 42 (10-11) ◽  
pp. 139-147 ◽  
Author(s):  
G. B. Athayde Júnior ◽  
D. D. Mara ◽  
H. W. Pearson ◽  
S. A. Silva
Keyword(s):  
Rainy Season ◽  
Pilot Scale ◽  
Faecal Coliform ◽  
Cost Ratio ◽  
Waste Stabilization Ponds ◽  
Net Return ◽  
Benefit Cost Ratio ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
In Series

This paper describes faecal coliform (FC) removal in pilot-scale Wastewater Storage and Treatment Reservoirs (WSTR) in northeast Brazil. FC decay during the filling phase of WSTR was very reduced, suggesting that these reactors should be filled as quickly as possible, and subjected to the highest organic loading that will not cause odour emissions. The highest loading employed in this study was 659 kgBOD5/ha.d, causing no nuisance conditions. During the resting phase, FC decay rate decreased exponentially and Chick's law was modified. The time into the resting phase for FC to reach 103 cfu/100 mL ranged from 15 to 25 days as WSTR depth varied from 2.00 to 6.50 m. The performance of sequential batch-fed waste stabilization ponds (SBFWSP) in removing FC was compared to that of waste stabilization ponds (WSP) operated in series. It was shown that, in general, SBFWSP were cheaper than WSP in series, with the bacteriological quality of the effluent in the former being more reliably predicted than in the latter operational regime. When provision of volume to store the winter effluents is considered, a WSP system presents a higher benefit/cost ratio than a hybrid WSP-WSTR system, but the adoption of the latter can double the annual net return for a rainy season of 5 months for instance. In the case of use of the hybrid WSP-WSTR system, the net return would be US$ 0.17 – 0.22 per cubic metre of available wastewater, depending on the length of the rainy season (3 – 5 months considered) as compared to US$ 0.12 from the WSP system alone.

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