Revamping Selected Water Networks for Increase in Hydrocarbon Load

5 Revamping Selected Water Networks for Increase in Hydrocarbon Load 

In the water network revamping for increase in hydrocarbon load, two different values for increase in hydrocarbon load (50 and 100% for each process) are considered. In total, three different values of hydrocarbon load in each process unit (that is, normal, 50% increase, 100% increase) are useful to understand the shift of Pareto-optimal front with change in hydrocarbon load. Here, concentration of each contaminant in waste water is limited at 400 ppm (the same as in the original design). 

Concentration (ppm) of contaminants in waste water leaving the system  

All non-dominated solutions (except solution 12) for 100% increase in the hydrocarbon load require only two treatment units (reverse osmosis, and API separator with ACA) as end-of-pipe treatment. In general, FW and TRU are significantly larger for the non-dominated solutions obtained with 100% increase in hydrocarbon load compared with those obtained with 50% increase. Owing to this, H2S and NH3 concentrations are well below the discharge limit (that is, 50 ppm). Hence, in this case, only two treatment units are required as end-of-pipe treatment. 

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