Process for the recovery of betaines from electrodialysis waste stream

A process for the recovery of betaines from electrodialysis waste streams from betaine production processes comprising:

• synthesizing a betaine in a reaction mixture to form a product stream;
• purifying the product stream by using an electrodialysis unit to produce a purified product stream and a waste stream;
• treating the waste stream by feeding the waste stream through a pressure driven membrane process, wherein the pressure driven membrane process comprises nanofiltration to produce a recovered product stream and a salt stream containing salts;
• and
• purifying the recovered product stream by feeding the recovered product stream directly to an electrodialysis unit to produce a purified recovered product stream that is combined with the purified product stream.