In the aeration tank of wastewater biochemical system, the oxygenation efficiency is positively correlated with the growth of microorganism. According to the number of aerobic bacteria, physiological characteristics, to provide oxygen dissolving apparatus oxygen. Mass characteristics and concentration should be considered comprehensively. This method can make the active sludge in a state of mechanical degradation. The experimental results show that the dissolved oxygen in the aeration tank should be kept within the concentration range of 3~4mg/L. The poor performance of sludge will reduce the effect of sewage treatment. To ensure an adequate supply of oxygen, a device called microporous aeration is needed. Aeration stirring method is such, the specific practice is as follows: reduce the bubble size, increase the number of bubbles, improve the degree of liquid turbulence, increase the depth of the aeration device, extend the bubble and liquid contact time. Based on this practice, aeration devices have been widely used in sewage treatment, so we will also pay attention to one of them. The problem is that the aerator will not have silt blockage, the use of microporous aerator, so that the sludge in the aeration tank is in suspension state, allowing machinery, active sludge, dissolved oxygen three full contact, improve the degradation rate, in the aeration. The aerator will be in contact with the sludge in the production process, sludge settling or suspended matter in sewage will lead to the blockage of the aerator, such as the microplate aerator is not blocked or does not appear. Long-term operation of aeration tank will reduce the degree of aerator blockage, while intermittent operation will increase the probability of aerator blockage. So when we make the aerator, we put a row of empty tubes at the end of it, so that when the empty tube stops aerating, it will discharge some of the sludge.
