One of the submersible mixers in the anaerobic tank is broken, which has no effect on the aerobic tank

If the anoxic tank submersible mixer is broken, the treatment efficiency will be reduced, the concentration of the bottom material will be increased, and the concentration of the oxygen consumption tank that naturally enters the back section will also be increased. When the microorganisms in the oxygen consumption tank have not been adjusted to the corresponding concentration, the increase of effluent COD will become possible. Therefore, confirm whether the concentration of the substrate entering the oxygen consumption tank is increased, and if it is increased, the activated sludge concentration of the oxygen consumption tank should also be appropriately increased.