Conductivity
Conductivity
(OP)
Hello,
I have a question that ive been pondering. How does sugars and fats influence conductivity in water. Basically we have a process here where we run 30% solids milk through an evaporator and separate the milk and water to 60% solids.
What happens is we have carryover of milk into the water exit stream (cow water). Right now we have been measuring conductivity, and pH to get a basis of water quality and the conductivity ranges was 15-20 (micro Siemens i think is the units) down to 2-8 with a separator pressure change. But how does sugar and milk influence your readings on conductivity (we run sweetened milk through the evaporator).
Second is conductivity a good measure to use for water quality given what we are separating (we are trying to clean up the water to use it elsewhere since the milk causes build up and slime later on).
We just sent samples to be measured for turbidity and im trying to swing corporate to buy a hand held.
I have a question that ive been pondering. How does sugars and fats influence conductivity in water. Basically we have a process here where we run 30% solids milk through an evaporator and separate the milk and water to 60% solids.
What happens is we have carryover of milk into the water exit stream (cow water). Right now we have been measuring conductivity, and pH to get a basis of water quality and the conductivity ranges was 15-20 (micro Siemens i think is the units) down to 2-8 with a separator pressure change. But how does sugar and milk influence your readings on conductivity (we run sweetened milk through the evaporator).
Second is conductivity a good measure to use for water quality given what we are separating (we are trying to clean up the water to use it elsewhere since the milk causes build up and slime later on).
We just sent samples to be measured for turbidity and im trying to swing corporate to buy a hand held.





RE: Conductivity
<<A good friend will bail you out of jail, but a true friend
will be sitting beside you saying " Damn that was fun!" - Unknown>>
RE: Conductivity
RE: Conductivity
mineral content of fresh milk is given below:
MineralContent per litre
----------------------------------
Sodium (mg)350-900
Potassium (mg)1100-1700
Chloride (mg)900-1100
Calcium (mg)1100-1300
Magnesium (mg)90-140
Phosphorus (mg)900-1000
Iron (ug)300-600
Zinc (ug)2000-6000
Copper (ug)100-600
Manganese (ug)20-50
Iodine (ug)260
Fluoride (ug)30-220
Selenium (ug)5-67
Cobalt (ug)0.5-1.3
Chromium (ug)8-13
Molybdenum (ug)18-120
Nickel (ug)0-50
Silicon (ug)750-7000
Vanadium (ug)tr-310
Tin (ug)40-500
Arsenic (ug)20-60
RE: Conductivity
What would be the best way to test our water for general cleanliness? Turbidity?
RE: Conductivity
RE: Conductivity
Turbidity might be a reasonable method, and should be more feasible than conductivity, but again, turbidity will be impacted by the fat content and minerals that could change the surface tension (which in turn will impact droplet size of the suspension). I suggest turbidity might be the way to go, but it may very well take some months of data to get control information. With a typical of <10 NTU, and "hand held" might not get you the repeatability you need, either.
RE NTU and FTU, this is probably more a function of the calibration standard you use. The actual methods and standards are somewhat different, but almost all that I have seen in the last 20 years has been in NTUs. Some of the FTUs reported are hold-overs from the old days.