Method of treating an aqueous solution containing urea, ammonia and carbon dioxide, comprising; i) introducing the solution into a first stripper PCS1 thereby separating and recovering ammonia and carbon dioxide; ii) subsequently introducing the solution into a urea hydrolyser UHY and heating the solution under pressure thereby hydrolysing the urea; iii) introducing the solution into a second stripper PCS2 thereby separating and recovering ammonia and carbon dioxide in the aqueous solution, wherein part of the aqueous solution before being stripped in the first stripper, and/or, a part of the aqueous solution after being stripped in the first stripper, but before being hydrolysed, is introduced into an exhaust gas treatment equipment equipped with a urea dust scrubbing equipment DSCR and an equipment to supress emission of ammonia ASCR (which may involve adding an acid to the aqueous solution). Second, third and fourth aspects are directed towards a method of retrofitting a urea treatment equipment to carry o
