An information recording medium includes a first information layer and a second information layer. A premixed mediumhigh molecular weight and mediumhigh charged cationic coagulant solution polymer and an inorganic aluminum species is injected into the wastewater, and after at least a two second delay, a high molecular weight highly charged anionic flocculent polymer solution is injected into the wastewater which reduces sludge generation, while maintaining or exceeding effluent quality. If the measured voltage is smaller than the threshold value it is determined that the switch is in a closed state, and if the voltage is larger than the threshold value it is determined that the switch is in an open state. This decreasing current draw in turn produces a decreasing voltage at the output of the operational amplifier. The oxidized cellulose may be stabilized against D.