The tubular centrifuge has the function of treating mycelium wastewater

The principle of centrifugal settling separation of tubular centrifuge is to make use of the characteristics of different settling speed of suspension or solid particles in the liquid, to settle and separate rapidly under the action of centrifugal force field, so as to realize the purpose of liquid-solid separation The separation factor is an important index of the separation performance of the centrifugal separator It represents the ratio of the centrifugal force of the separated material in the drum to its gravity The larger the separation factor is, the faster the separation is usually, and the better the separation effect is In the laboratory, we selected an electric centrifuge with rotation speed of 4000 R / min, rotation radius of 0.1M and separation factor of 2000 to separate mycelium wastewater Take the mycelium wastewater (SS value is 20000mg / L) into the centrifuge tube, put it into the centrifuge, turn on the power, turn off the machine after running for 40s, and measure the SS concentration of the centrifugal clear liquid; take the mycelium wastewater of the same concentration and add the selected flocculant, so that the concentration in the water can reach the flocculation effect, and then carry out the experiment with the same operation after mixing, and measure the SS concentration of the centrifugal clear liquid In this experiment, a centrifuge with a separation factor of 2000 is used The results show that it is feasible to treat the mycelium wastewater with a tubular centrifuge As long as the separation factor is enough or flocculant is added, the mycelium wastewater can be directly treated by the centrifugal method to achieve the standard discharge The function of adding flocculant in the experiment process is due to the presence of fine mycelium wastewater and other impurities in the wastewater Because of the same-sex repulsion, it is not easy to agglomerate into large particles, so it is very difficult to produce sedimentation by its own weight, so it will form a relatively stable suspension If the chemical agent with opposite charge with the suspended particles can be used to absorb the charges in the middle and on the surface of these particles, the With the decrease of surface potential, the stable state of colloidal particles is destroyed, resulting in agglutination and accelerated sedimentation Therefore, we choose a certain type of polyacrylamide which can be used in alkaline condition as flocculant.