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There is no better base available for the nuetralization of acids than caustic soda. You do have the downside of heat generation. Is this a metal bearing waste? Mg(OH)2 is typically used in wastewater treatment when heavy metals are present. It alters the sludge formation in a favorable fashion...

Class I of the spec you refer to i9n section 3.5 states: "Any natural coloration resulting from anodic treatment with the various alloy compositions shall not be considered coloration. The characteristic color Imparted by the sealing process shall also be considered as non-dyed." I would argue...

There are a number of ASTM spec's that call for the use of distilled water in the make up of reagents etc. I understand the desire to use "pure" water in these reagents. Can deionized water be substituted for distilled water in these formulations when a specific ASTM water quality has not been...

viscosity has to be measured. There are ways to estimate it if you have at least one data point, but accuracy is suspect. Keep in mind that viscosity is very temperature dependent. Check with Caustic Soda mfg and they may have the data you need.

The dimensions of the slot are 3/8" wide by 13" high. L-.1nH yields a negative number with these dimensions. Thanks to everyone for your help. I'll continue to search.To manually measure it, which is a great suggestion, is currently practical.

I actually tried that already and it doesn't pass a reality check. I have a plating tank that has wire running through it stacked in a vertical fashion through slots in each end. This tank will have solution pumped into it and I'm trying to determine how much solution will flow through the slots...

Can someone help with an equation to determine the expected gravity flow through a vertical slot (Height/width ratio >30).

Simply use a formula where you subtract the older date from the more recent date and format the cell with the formula as a number.

The first consideration has to be the water quality feeding the tower. Is it naturally corrosive or scale forming? Any water treatment chemical supplier would be happy to do the testing for you. They can then reccommend # of cycles and the appropriate treatment program.

Is this a closed loop system or a cooling tower? If a tower, how many cycles and what is the chemistry of the water, TDS, hardness, etc. More data is needed for an appropriate response.

This should give you all the details you need. http://www.labsafety.com/refinfo/ezfacts/ezf120.htm

Again, please explain to me how the heat is tranfered from a cold strem to a hotter stream.

What am I missing here folks. My intuition tells me this is an impossible problem. 2 streams with the same mass flow and different temps. Delta T is required for heat transfer. As the cool side heats the hot side cools and at some point between the 250 and 70 the temperature will be the same...

A quick graph of the data at 1 degree interval shows asymptotes at 90 and 270. Absolute values will be dependent on the constants. This allows a quick quess for a value of Y given a Y.

SS does not like sodium. Use potassium chloride for regeneration and your problem should go away.