Waste Stabilization Pond Articles & Analysis
35 articles found
O’Malley says the organization looked at 12 different sanitation options before settling on a gravity-fed system of pipes and a pumping station to move the effluent to a Waste Stabilization Pond. “We initially estimated 20 liters per person per day to determine tank capacity. ...
This paper presents the findings from a series of computational fluid dynamics simulations to estimate the effect of scale and Froude number on hydraulic performance and effluent pollutant fraction of scaled waste stabilization ponds designed using Froude similarity. Prior to its application, the model was verified by comparing the ...
Treated wastewater usually contains high levels of nutrients that can cause algae blooms on the water surface of storage ponds. The treatment of algae in waste water lagoons is important to improve the water quality before discharge. Algae growth in stabilization ponds and lagoons An important issue to consider in wastewater ...
Waste stabilization ponds (WSPs) and their variants are one the most widely used wastewater treatment systems in the world. ...
Waste stabilization ponds (WSPs), as part of municipal wastewater treatment strategies, can exhibit variability in performance due to climatic conditions. ...
Wineries generate 0.2 to 4 L of wastewater per litre of wine produced. Many cellars make use of irrigation as a means of disposal, either directly or after storage. In order to consider the potential downstream impacts of storage/no storage, this study critically compared the seasonal organic and inorganic composition of fresh winery effluent with effluent that had been stored in waste ...
Urban water systems are often designed using deterministic single values as design parameters. Subsequently the different design alternatives are compared using a discounted cash flow analysis that assumes that all parameters remain as-predicted for the entire project period. In reality the future is unknown and at best a possible range of values for design parameters can be estimated. A ...
Many configurations exist, with systems associated with horizontal flow filters or waste stabilization ponds, vertical flow with recirculation, partially saturated systems, etc. ...
A large database from an experimental maturation pond system in Brazil was used to verify the agreement of field results with values predicted by some of the most widely accepted models to describe ammonium and total nitrogen (TN) removal in facultative and maturation ponds. The same database was used to derive a pH-independent linear model to predict ammonium removal in ponds, which was proved ...
Technologies applied to WWTPs are mostly with biological functions such as activated sludge, stabilization reservoir, oxidation ponds, rotating biological contactor (RBC), waste stabilization pond (WSP, normal, hybrid and complete), continuous stirred tank reactor (CSTR), stabilisation lagoon, wastewater ...
Technologies applied to WWTPs are mostly with biological functions such as activated sludge, stabilization reservoir, oxidation ponds, rotating biological contactor (RBC), waste stabilization pond (WSP, normal, hybrid and complete), continuous stirred tank reactor (CSTR), stabilisation lagoon, wastewater ...
In this work, we explored the fundamentals of electroflotation by alternating current (EFAC) with non-consumable electrodes to simultaneously harvest microalgae and disrupt cells from mixed microalgae obtained from waste stabilization ponds. The harvesting efficiency was evaluated using chlorophyll-a and turbidity, which reached removals of ...
During the last 15 years several authors studied the disinfection in waste stabilisation pond (WSP) and several empirical models were developed. There are huge differences between the models describing this process and there is really a need to improve the design of ponds for better disinfection. This paper addresses the Escherichia coli and enterococci disinfection in a laboratory pilot scale ...
To provide data that can be used to refine QMRA models of wastewater-fed agriculture in Accra, stream, drain, and waste stabilization pond waters used for irrigation were sampled and analyzed for concentrations of fecal indicator microorganisms (human-specific Bacteroidales, Escherichia coli, enterococci, thermotolerant coliform, and somatic and ...
A quantitative microbial risk assessment model for estimating infection risks arising from consuming crops eaten raw that have been irrigated with effluents from stabilization ponds was constructed. A log-normal probability distribution function was fitted to a large database from a comprehensive monitoring of an experimental pond system to account for variability in Escherichia coli ...
An intermittent discharge waste stabilisation pond system was trialled for treatment of a seasonal wastewater load from a campsite. The system showed rapid acclimatisation to incoming load, with chlorophyll-a exceeding 700 mg l−1 within 2 weeks and filtered and unfiltered effluent biochemical oxygen demand below 20 and 30 mg l−1 respectively. Good performance continued for some ...
The design manual for waste stabilization ponds and constructed wetlands presented in this CD ROM gives a comprehensive technical information about their planning, design and operation. Also a number of numerical models are included to assist in finding the size of a constructed wetland or stabilization pond, ...
Rock filters are an established technology for polishing waste stabilization pond effluents. However, they rapidly become anoxic and consequently do not remove ammonium-nitrogen. ...
This study evaluates the performance of four 2.3 m deep pilot-scale, independently loaded, primary facultative ponds treating predominantly domestic sewage in northeast Brazil. The ponds contained longitudinal baffles giving different length to width ratios from 3.55 to 32.4. ...
WSP technology has been used in Ceará, Northeast Brazil, since middle 1970s. There are presently 96 ponds plants and most of them are comprised by single cells (40%) and series of 3 ponds (35%). They were under loaded due to incomplete house connections to the sewerage network and low per capita wastewater contributions. Highest removal rates of organic material, ammonia and faecal coliform were ...