Peroxide brightening/bleaching is an important unit operation for pulp and paper mills producing value-added paper grades containing bleached mechanical pulps. In this paper, a number of process innovations have been discussed. They include: hydrosulphite assisted chelation process, the so-called Q(y) process; DTPA spray; P-N2 process; P-M process; Mg(OH)(2)-based peroxide process. It will be shown that these processes can improve the peroxide brightening/bleaching processes in terms of (1) decreasing the production cost, (2) improving the product quality, and (3) decreasing the environmental impact.