Domestic wastewater treatment in waste stabilization ponds for irrigation in Mendoza, Argentina: policies and challenges

2002 ◽  
Vol 45 (1) ◽  
pp. 127-132 ◽  
Author(s):  
O.R. Vélez ◽  
G.E. Fasciolo ◽  
A.V. Bertranou
Keyword(s):  
Domestic Wastewater ◽  
Treated Wastewater ◽  
Water Shortages ◽  
Waste Stabilization Ponds ◽  
Domestic Wastewater Treatment ◽  
Waste Stabilization ◽  
Agricultural Applications ◽  
Agricultural Use ◽  
Domestic Effluents ◽  
Set Up

Arid areas call for imaginative water management solutions to avoid the dangers of water shortages. Growing demands of water for domestic and industrial uses decrease the availability of water for agriculture. It therefore becomes necessary to set up a policy for the use of domestic effluents. For the province of Mendoza, Argentina, with 1,500,000 inhabitants, a master plan was designed as of 1991 for the treatment of domestic effluents and subsequent disposal for irrigation. The guidelines set up by WHO for the use of wastewater in agricultural applications were taken into consideration. At present, the Province of Mendoza has available projects which are either complete, in execution or in the bidding process, entailing secondary treatment capacity with reuse of 320,000 cubic metres/day and an estimated possible irrigation area of 10,000 hectares. With this infrastructure, some strategic lines of action are recommended to establish a policy for the agricultural use of wastewater: (a) to program the use of treated wastewater to avoid discharges to irrigation flows; (b) to develop an institutional scheme for the efficient and safe use of these waters; and (c) develop scientific and technologic know-how to accompany the updated policies.

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.

scholarly journals Characterizing phosphorus removal in passive waste stabilization ponds in Arctic communities

2016 ◽  
Vol 2 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Jordan J. Schmidt ◽  
Colin M. Ragush ◽  
Wendy H. Krkosek ◽  
Graham A. Gagnon ◽  
Rob C. Jamieson
Keyword(s):  
Total Phosphorus ◽  
Phosphorus Removal ◽  
Organic Phosphorus ◽  
Domestic Wastewater ◽  
The Arctic ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Fractionation Analysis ◽  
Arctic Communities

A majority of communities in the Canadian territory of Nunavut rely on passive waste stabilization ponds (WSPs) for domestic wastewater treatment. Little research has been conducted on the treatment performance of these systems. Therefore, in response to impending federal wastewater regulations, a research program was conducted in order to characterize contaminant removal, with phosphorus a contaminant of particular concern. The performance of WSPs in the Arctic communities of Kugaaruk, Pond Inlet, Grise Fiord, and Clyde River was evaluated from 2011 to 2014. Removal of total phosphorus was highly variable, ranging from 24% (Pond Inlet, 2014) to 76% (Grise Fiord, 2011). The average removal efficiency was 44%. Effluent total phosphorus concentrations generally exceeded 7 mg P/L, partly due to elevated raw wastewater concentrations. Over the course of the treatment season (defined as June to September, when the WSP is thawed), limited additional total phosphorus removal was observed. A fractionation analysis of WSP sediments showed that organic phosphorus and phosphorus bound to aluminum and iron were the predominant forms, which provided insight into primary treatment mechanisms. Further studies on these mechanisms are needed in order to optimize Arctic WSP treatment.

scholarly journals AN EFFICIENT APPROACH TO MANAGE DOMESTIC WASTEWATER IN SMART CITY

2020 ◽  
Vol XLIV-4/W3-2020 ◽  
pp. 391-398
Author(s):  
A. Taouraout ◽  
A. Chahlaoui ◽  
D. Belghyti ◽  
I. Taha ◽  
M. Lachhab
Keyword(s):  
Smart City ◽  
Domestic Wastewater ◽  
Treated Wastewater ◽  
Acceptable Solution ◽  
Organic Matters ◽  
Human Waste ◽  
Ecological Sanitation ◽  
Limit Value ◽  
Domestic Wastewater Treatment

Abstract. The adoption of an ecological sanitation system, meeting the requirements hygienic and sanitary, constitutes a feasible and technically and economically acceptable solution in the future smart city. This new sanitation concept has the advantage of solving the problems of pathogens of human waste at source, thus offering the possibility of reusing them after treatment (recycling) in order to improve the standard of living of the population and protect the environment. The aim of this study is to evaluate the efficiency of a vertical Multi-Soil-Layering system (MSL) system to treat domestic wastewater under three hydraulic loading rates: 250 L/m2/day, 350 L/m2/day and 500 L/m2/day, in Moroccan conditions. To do this, a vertical MSL system measuring 20cm × 60cm × 78cm (L × W × H) was designed to treat domestic wastewater and his performance was investigated. The results showed high removal of organic matters and nutrients under the three hydraulic loads tested; the performance averages recorded are upper than 84 % for organic matters, 83.1 ± 7.2 % for ammonium and 72.4 ± 14.1 % for orthophosphate. The quality of the treated wastewater was evaluated according to Moroccan reject limit value. Consequently, this system could be considered an effective solution to be adopted for decentralized domestic wastewater treatment in Moroccan conditions.

scholarly journals EFFECTIVENESS OF WASTE STABILIZATION PONDS IN REMOVAL OF LINEAR ALKYL BENZENE SALFONATE (LAS)

2013 ◽  
pp. 134-142
Author(s):  
Ahmad Mohmed Abdelrahman ◽  
Ahmed Mohmed ◽  
Ali Gad ◽  
Mohmed Hashem
Keyword(s):  
Common Property ◽  
Winter Season ◽  
Treated Wastewater ◽  
Alkyl Benzene ◽  
Waste Stabilization Ponds ◽  
Alkyl Benzene Sulfonate ◽  
Linear Alkyl Benzene ◽  
Stabilization Ponds ◽  
Treated Effluent ◽  
Waste Stabilization

Detergents contain synthetic or organic surface active agents called surfactants, which are derived from petroleum product precursors. They have the common property of lowering the surface tensions of water thus allowing dirt or grease adhered to various articles to be washed off. Linear alkyl benzene sulfonate (LAS) is an anionic surfactant most commonly used. Discharge of raw or treated wastewater containing this chemical into the environment causes major public health and enviromental problems. In this study, samples were taken from the raw wastewater and effluents of treatment ponds of Elzaraby waste stabilization ponds over a period of one year. The treated effluent is either discharged into surface waters or reused for agricultural irrigation. The samples were analyzed according to the standard methods. The results obtained from the samples taken in different seasons showed that the highest overall removal efficiency of LAS was achieved in the summer season (77%), and the least efficiency observed in the Winter season (55%), while the maximum overall efficiency of BOD5 was in summer (88%) and minimum efficiency was (73%) in winter season. The Dissolved oxygen concentrations along the pond series (DO) ranged between 0.18 to 4.8 mg/l.

scholarly journals Identification of microalgae from waste stabilization ponds and evaluation of electroflotation by alternate current for simultaneous biomass separation and cell disruption

2019 ◽  
Vol 24 (1) ◽  
pp. 177-186 ◽  
Author(s):  
Anna Patricya Florentino ◽  
Mayara Carantino Costa ◽  
José Gilmar Silva Nascimento ◽  
Eliezer Fares Abdala-Neto ◽  
Cesar Rossas Mota ◽  
...  
Keyword(s):  
Low Cost ◽  
Domestic Wastewater ◽  
Alternate Current ◽  
Cell Disruption ◽  
Waste Stabilization Ponds ◽  
High Frequencies ◽  
Lipid Yield ◽  
Algal Diversity ◽  
Microalgae Harvesting ◽  
Waste Stabilization

ABSTRACT This work aimed to investigate algal diversity at the genus level in stabilization pond systems treating domestic wastewater and to evaluate the feasibility of an electroflotation by alternate current (EFAC) system for simultaneous microalgae separation and cell disruption. Evaluation of algal diversity showed that the genera Euglena and Chlorella were present in relatively high frequencies in five of the six effluents analyzed. The use of EFAC on an effluent that presented bloom of Chlorella achieved turbidity and chlorophyll-a removal efficiencies higher than 70 and 90%, respectively, after 70 minutes of operation. Total lipid yield for the Chlorella-rich biomass was 21.4±2.02%. Such high biomass lipid content demonstrates the potential for obtaining lipid-based biofuels from wastes. The current paper describes the first attempt, with promising results, at using electroflotation by alternate current for low cost, simultaneous microalgae harvesting and disruption.

Removal of pathogenic organisms from the effluent of an upflow anaerobic digester using waste stabilization ponds

1995 ◽  
Vol 31 (12) ◽  
pp. 275-284 ◽  
Author(s):  
N. G. H. Dixo ◽  
M. P. Gambrill ◽  
P. F. C. Catunda ◽  
A. C. van Haandel
Keyword(s):  
Retention Time ◽  
Domestic Wastewater ◽  
Time Of Day ◽  
Uasb Reactor ◽  
Waste Stabilization Ponds ◽  
Intestinal Nematode ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Nematode Eggs ◽  
Pathogenic Organisms

A series of four pilot-scale, shallow waste stabilization ponds (WSPs), comprising one facultative followed by three maturation ponds with a total design retention time of 20 days, was monitored to observe its ability to remove pathogenic organisms from the effluent of an upflow anaerobic sludge blanket (UASB) digester. The UASB reactor received strong domestic wastewater from the shanty district of a city in north-east Brazil. The raw wastewater had a very high concentration of intestinal nematode eggs of which, on average, 89.6 percent were removed in the UASB reactor. No intestinal nematode eggs were recovered in the effluent of the first maturation pond, making it suitable for restricted irrigation. The removal of eggs in the first pond exceeded predictions made using a recently published model. Faecal coliforms (FC) were reduced by 4.7 log units on average in the pond series -- the final effluent being suitable for unrestricted irrigation. pHs exceeding 10 were attained in the final maturation pond at the sunniest time of day. There was a significant correlation between levels of pH and FC in the ponds, the latter being ≤ 1000 per 100 ml when the former was ≥ 9.1. The removal of FC in the ponds was linear over the range of pH encountered. The findings are consistent with recent work by others suggesting that FC removal in ponds is multi-factorial. The UASB reactor, with a retention time of 7 h, is an efficient primary treatment alternative to an anaerobic pond in a WSP series receiving an extremely strong domestic wastewater. There are potential advantages of using the former in preference to the latter in a series of ponds.

Composting of sewage sludge in a rotating vessel

1995 ◽  
Vol 32 (11) ◽  
pp. 121-125 ◽  
Author(s):  
M. Fürhacker ◽  
R. Haberl
Keyword(s):  
Sewage Sludge ◽  
Wastewater Treatment Plants ◽  
Domestic Wastewater ◽  
Control Programme ◽  
Domestic Wastewater Treatment ◽  
Inorganic Content ◽  
Plant Test ◽  
Agricultural Use ◽  
Intensive Control

Composting of sewage sludge can enhance its quality and suitability for agricultural use. In this work the optimal conditions for composting sewage sludge of small domestic wastewater treatment plants in a rotating vessel with the aim of sanitary safety were investigated. An intensive control programme with regard to viruses, bacteria and parasites was carried out that showed that the hygienic quality was satisfactory. A second aspect was the investigation of a possible reduction of hazardous organic and inorganic pollutants. The amount of inorganic micropollutants was low and did not change based on inorganic content. Based on inorganic residues, losses of 15.7% of the AOX and 25% of the EOX could be found. Relatively high decreasing rates of detergent concentrations could be measured. Only 31.1% of the original load of anionic detergents (measured as MBAS), 38.7% of the cationic and 57.4% of the non-ionic detergents could be detected in the end material. For PAH concentration reduction between 31.5% of fluoranthene and 90.6% benzo(a)pyrene can be reported. All values are based on the inorganic residues. The quality of the resulting compost showed in the plant test a growth rate which qualified the compost to be used to increase soil quality.

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