I will be running a CSTR (continuous stirred-tank reactor) with algae and slurries at varying ratios for over 6 months, for Biogas production, with the high sodium levels and associated salinity inhibition.
I am looking to find out how to measure salinity, maybe in terms of sodium chloride mg/l or using a conductivity meter and measure in μS/cm. Which method would be the most applicable?
It is common the conductivity method, but my sugestion is measure the chloride concentration also, therefore with less frequence.
Could you suggest a standard for chloride measurement or are there Hach vials for using a spectrometer?
The common method is conductivity measurement,it is suggested to measure chloride concentration and both be correlated,for chloride determination,you can get standard methods from American Public Health Association methods for Water Analysis.
It is common the conductivity method, but my sugestion is measure the chloride concentration also, therefore with less frequence.
Measure both parameters and find the correlation. Then you can follow the conductivity, esier and quicker to determine that chloride.
In your case, control of NaCl is important to grow the algae. Therefore, use of Ion Chromatography (IC) anion and cation concentration can be known. Here, i am using IC for anaerobic process. Perhaps, concentration of nitrate, nitrite and nitrogen-ammonium can also be detected to reduce the inhibition of anaerobic process.
Dr Elena Maranon's has suggested easy solution. Advance preparation of a good calibration curve with Na+ and Cl-- concentrations and EC should provide a conversion factor for all the continuous measurements of EC.
You can use salinometer for measuring the salinity of water, i think it is best method
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