Results 261 to 270 of about 29,843 (308)

VISCOSITY STABILIZED SOLAR PONDS

1978
A solar pond for collecting solar energy preferably filled with a shallow layer of water over a blackened sunlight-absorbing surface which is in turn in contact with a heat-storage or heat exchanging medium. Convection in the solar pond is inhibited by raising the viscosity of the pond by adding gelling agents, for example, a polyethyleneoxide adduct ...
openaire   +1 more source

Mechanistic model for facultative stabilization ponds

Water Environment Research, 1993
ABSTRACT: 
In this work a 12‐parameter mechanistic model representing the biochemical interactions in facultative stabilization ponds is proposed (as an extension of the Fritz et al. [ 1979] model). An acceptable degree of fitness between the model predictions and the experimental data from the real plant was obtained.
F. LLavador Colomer, D. Prats Rico
openaire   +1 more source

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

Phosphorous Models for Waste Stabilization Ponds

Journal of Environmental Engineering, 1984
A laboratory investigation was conducted to evaluate the utilization and recycle of phosphorous in waste stabilization ponds (WSP). Two pond systems were operated under three different loading conditions during a period of 22 months. System I consisted of three series‐connected ponds: an anaerobic WSP followed by an intermediate facultative WSP and a ...
Harvey J. S. Houng, Earnest F. Gloyna
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

Elimination of Salmonella in stabilization ponds

Water Research, 1973
Abstract While the reduction of putrescible organic matter is important in sewage treatment, the microbiological quality of the effluents is of great public health significance, since these are usually discharged into streams or onto land. The performance of two types of stabilization ponds located at Nagpur, India, was studied with respect to the ...
S.R. Joshi, N.M. Parhad, N.U. Rao
openaire   +1 more source

Design Principles of Waste Stabilization Ponds

Journal of the Sanitary Engineering Division, 1969
Waste stabilization ponds will be more effectively employed as pollution control systems if suitable design formula and corresponding design parameters are made available to design engineers. To accomplish this objective, an analogy has been drawn between a first-order chemical reactor and a waste stabilization pond.
openaire   +1 more source

Stabilization Ponds

2022
Subhash Verma, Varinder S. Kanwar, Siby John   +2 more
openaire   +1 more source

Sulfide Production in Waste Stabilization Ponds

Journal of the Sanitary Engineering Division, 1969
This investigation deals with the production and release of hydrogen sulfide from waste stabilization ponds, and required design modifications, resulting from increased sulfate or hydrogen sulfide content. A 6-ft deep facultative pond was operated under seven different operating conditions.
Earnest F. Gloyna, Ernesto Espino
openaire   +1 more source

Temporal stability of pond zooplankton assemblages

Freshwater Biology, 2004
Summary1. A large body of recent theory has recently developed focused on the relationship between the species diversity of competitor assemblages and the temporal stability of total competitor biomass. Many of these models predict that stability can increase with increasing diversity.2.
openaire   +1 more source