TSS and Turbidity does not ...
Published by JOSE LUIS TALAVERA, PRIVATE DESALINATION CONSULTANT
TSS and Turbidity does not match, TSS probably will be much lower. Measurement of TSS for low levels is very difficult.
SDI15 should give a better understanding of the quality, but probably should be lower than 1.
As other people mentioned, EDR will give you a higher recovery (85-90 %) but every stage will reduce the TDS 50% average. It's very easy to calculate the number of stages you need knowing the quality you want to achieve. Two stages is ideal, three stages is the higher economical number. Advantages: No biofouling, even during standby time,Chlorine gas production (You save a lot of money in hypo to sterilize the product water) No membrane replacement in many years. Membranes are chlorine resistant. No sand filters for this water, only cartridge filters as pre treatment.
RO is also a good option. Perhaps you do not need sand filters as well. It will depend on the amount of colloids. A measurement of SDI15 will give you the answer.
CAPEX and OPEX data is needed to take a decision