DESCAR software: outfall and reverse osmosis

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Algorithms II · software · outfall and reverse osmosis

1. Buoyant jet model

A type of mathematical model that has been developed for sumerged round buoyant jets is the length-scale model. Discharges flows can be divided into different regimes each dominated by particular flow properties. Within each regime, the flow may be approximated with simple mathematical relations describing the simplified problem. A model that uses asymptotic solutions is refered to as length-scale model because of length scales to delineate the extent of the regimes for which the mathematical expressions are valid. The pollutant concentration, in a certain instant, and at a distance x (meters) in the X-Axis and at a distance y(meters) in the Y-Axis will be given by:

c =c_c exp[-(r/b)²] (1)

where c is the pollutant concentration, r is the distance from the point (that we are calculating) to the center of the line that forms the polluting plume, c_c is the pollutant concentration in the center of the plume line and b is the plume half-width. We attempt to link the momentum dominated and buoyanvy dominated regimes into one relationship by using proposed relations for the transition where:

z/L_b =2^4/3[(1/2)(x/L_b)²+(L_m/L_b)(x/L_b)]^1/3 (2)

b/L_b =c_b[(1/2)(x/L_b)²+(L_m/L_b)(x/L_b)]^1/3 (3)

S=c_s(u_o/u_a)[(1/2)(L_b/L_m)(x/L_m)²+(x/L_m)]^1/3 (4)

L_b=plume-to-crossflow length scale

L_m=jet-to-crossflow length scale

x=horizontal downstream coordinate in global coordinate system

y=horizontal coordinate in coordinate system perpendicular to ambient crossflow

z=vertical coordinate

u_a=ambient velocity

u_o=discharge velocity

S=dilution along the plume centerline C/C₀ being C the centerline pollutant concentration and the C₀ initial pollutant concentration at the discharge.

c_b=constant of proportionality that can be modified by the user (can be determined experimentally)

c_s=constant of proportionality that can be modified by the user (can be determined experimentally)

c_xy=constant of proportionality that can be modified by the user (can be determined experimentally)

We obtain solutions for a vertical buoyant jet in a crossflow. And buoyant jets discharged horizontally perpendiculat to crossflow.

z/L_b =c_xy(x/L_m)^1/3 (5)

This model performs satisfactorily for simple flows with no shoreline interaction or attachment. Strong crosscurrents or limited depths causing attachment with the downstrean bank or strong initial buoyancy render this model invalid. In addition, they are incapable of simulating any far-field processes that occur after a certain distance.

outfall and reverse osmosis

DESCAR software solutions: This application has been used in great number of environmental reports, courses and water pollution studies in the last years. We currently have users in more than 10 countries. Water pollution reports:

Devon - industrial reverse osmosis - reverse osmosis installation -

Lincolnshire - reverse osmosis fluoride - reverse osmosis waste water - reverse osmosis desalination plant -

Cumbria - industrial water filtration - water cooler -

North Yorkshire - reverse osmosis treatment - seawater reverse osmosis - reverse osmosis design -

Suffolk - reverse osmosis deionization - reverse osmosis service - reverse osmosis companies -

Kent - reverse osmosis water system - reverse osmosis plant and reverse osmosis desalination -

Essex - reverse osmosis process - zero waste reverse osmosis - reverse osmosis plants -

Shropshire - reverse osmosis - reverse osmosis - water purification systems -

San Miguel: sewage water treatment with DBO - port of discharge calculation and sewage pumps - sewage discharge modeling

San Salvador: sewage treatment plant study - standard methods for examination of water and wastewater -

Jutiana: wastewater treatment plants -

La Union: wastewater plant - wastewater management - slaughterhouse wastewater -

San Vincente: stream discharge with Cl2 study - sewage plant and wastewater minimization report -

Santa Ana: sludge and effluent with Pb report - sludges and wastewaters with Hg study - biotreatment in sewage report - sewage discharge modeling

Aberdeen - sewage problem - london sewage - sewage lard

Armagh - recycled sewage water - treated sewage - recycling sewage water -

Sonsonate: suspended solids and biosolids in effluents study -

Wiltshire - continental sewage - sewage plumbing - sewage grinder pump -

Bangor - effluents with solid wastes and anaerobic report - heavy metals in wastewaters study - sewage discharge modeling

Bath - anaerobic wastewater treatment and biological wastewater study - activated sludge and anaerobic digestion report - sewage discharge modeling

Bradford - water and wastewater treatment with heavy metals - wastewater engineering - sewage discharge modeling

Brighton & Hove - sewage sludge and partial discharge report - sewage treatment and glow discharge study - sewage discharge modeling

Belfast - wastewater effluent design report - water discharge with heavy metals study - sewage discharge modeling

Birmingham - wastewater engineering treatment and reuse - effluent guidelines - sewage discharge modeling

Bristol - trichomoniasis and trichomonas hominis report - standard methods for the examination of sewage discharges - sewage discharge modeling

Shropshire - sewer design - boston water and sewer - home sewage system -

Gloucestershire - sewage removal - sewage treatment plant - sewage pump - sewage system - sewage pumps - sewage systems - sewage disposal -

Staffordshire - sewage pumping station -

Oxfordshire - sewage sludge - sewage water - surfers against sewage -

Cambridgeshire - sewage systems - sewage pump - sewage filtration - sewage basin - sewage drinking water - sewage well - sewage wetlands -

Lancashire - water conservation - drinking water - water treatment plant - industrialised countries - water resources -

Chalatenango: trichomonas and wastewater study - wastewater treatment and sewage discharges -

Cojutepeque: water and wastewater study -