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Industrial wastewater collection in retention basins

Industrial wastewater collection in retention basins

(OP)
Am evaluating the possibility of sending industrial waste water containing Sodium Bicarbonate @ 85ppm and PVA @ 13ppm to a 4 acre catch basin with clay substrate at flow rates of 300,000 gpd....any ideas on expected evaporation rates over this surface area at temperature ranges commonly found in SE regions of US and what effect aeration of the basin would have on these rates with various horsepower pumping stations?

RE: Industrial wastewater collection in retention basins

This information can be found from the USGS and can be corrected for individual situations. The dissolved materials will have little effect initially but will retard evaporation over the long term. there are many site specific situations that will affect evaporation rates. You could try a pan evaporation test, just be careful how you interpret the results.

RE: Industrial wastewater collection in retention basins

If reducing the evaporation rate is a goal, you might consider putting a floating roof on the basins to reduce the evaporation rates.

RE: Industrial wastewater collection in retention basins

Why are you concerned about evaporation loses?

Factors affecting evaporation:

surface area; aerators will increase surface area
temperature
humidity
wind velocity

With these you can estimate maximum or worst case, minimum, or average.

Civil Engineering textbooks have models for aeration basins. You can calculate expected temperature loses. Check manufacturer's specs on the aerators. And assume some weather condition.

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