Results 241 to 250 of about 1,463,576 (291)

Phytoplankton as bioindicator for waste stabilization ponds

Journal of Environmental Management, 2012
Waste stabilization ponds are an appropriate technology for domestic onsite wastewater treatment. It is a low-cost technology, requires low maintenance, is highly efficient, mostly natural and remarkably sustainable. In facultative ponds, the existence of an algal population is very important for the stability of the symbiotic relation with aerobic ...
Caterina, Amengual-Morro, Gabriel, Moyà Niell, Antoni, Martínez-Taberner   +2 more
exaly   +3 more sources

Design of waste stabilization pond systems: A review

Water Research, 2017
A better design instruction for waste stabilization ponds is needed due to their growing application for wastewater purification, increasingly strict environmental regulations, and the fact that most of previous design manuals are outdated. To critically review model-based designs of typical pond treatment systems, this paper analyzed more than 150 ...
Wout Van Echelpoel, Long T Ho, Peter Goethals   +2 more
exaly   +3 more sources

Studies on High Altitude Waste Stabilization Ponds in Peru

Water Science and Technology, 1987
Studies on waste stabilization ponds at Cajamarca (altitude: 2,675 metres) and Juliaca (3,827 metres) in Peru have shown that existing pond design equations can be confidently used for designing ponds for high Andean towns, even though there are large ...
D D Mara, H W Pearson
exaly   +2 more sources

Ammonia Toxicity to Algal Growth in Waste Stabilization Ponds

Water Science and Technology, 1987
The ammonia concentrations in 1.25 and 2.3 metre deep waste stabilization ponds at Extrabes N.B. Brazil receiving domestic sewage were largely independent of the surface organic loadings on the deep ponds at least above loading rates of 200 kg BOD5 ha−1 ...
H W Pearson
exaly   +2 more sources

Waste Stabilization Ponds in Europe

Water and Environment Journal, 1992
ABSTRACTThe European countries where sewage treatment in waste stabilization ponds is largely developed and commonly used are West Germany (more than 2000 operational systems) and France (about 2500 plants). Portugal has over 50 systems at present and will have about 100 by the year 1993.
openaire   +1 more source

Waste Stabilization Ponds and Lagoons

2009
One of the simplest forms of biological treatment processes is the stabilization pond or stabilization lagoon. It is also the most common industrial wastewater treatment facility. This versatile installation serves many basic purposes, including: (a) storage or impoundment of wastewater; (b) settling and removal of suspended solids; (c) storage or ...
Nazih K. Shammas, Lawrence K. Wang, Zucheng Wu   +2 more
openaire   +1 more source

Light penetration in waste stabilization ponds

Water Research, 1994
Abstract The penetration of light into waste stabilization ponds was studied because of its importance in pathogen removal and algal productivity. The attenuation of light in ponds was dominated by light absorption by gilvin (also called dissolved yellow matter or humic substances) and algae, light scattering processes (turbidity) being of no ...
Curtis TP, Mara DD, Dixo NGH, Silva SA
openaire   +2 more sources

Hydraulic Modeling for Waste Stabilization Ponds

Journal of the Environmental Engineering Division, 1981
Treatment performance of waste stabilization ponds is a function of both the hydraulic transport and the biological and chemical transformation processes within the pond. Both the efficient hydraulic design of these ponds and the appropriate mathematical models for describing the hydraulic transport process are identified.
Raymond A. Ferrara, Donald R.F. Harleman
openaire   +1 more source

Effect of tapering on the performance of waste stabilization ponds

Water Research, 2001
A model for wastewater degradation in a tapered waste stabilization pond was derived as a modified Bessel function by materials balance approach. Based on hypothetical data, the tapered model gave lower faecal bacteria removal than the conventional (rectangular) model for various values of dispersion number, die-off rate coefficient, average width and ...
openaire   +2 more sources