【摘要】 通过进行废水浓度变化对污泥颗粒化影响的试验,发现:颗粒直径随进水浓度的上升而增大,受传质过程所能进入颗粒内部的营养量所控制。应根据COD去除率的情况适时提高进水浓度,及时地随微生物数量的增加补充营养,促进污泥颗粒化;避免了浓度变化太快引起细菌生长过快,污泥结构松散,沉降性能下降及COD去除率和产气率降低。更多还原

【Abstract】 By the experiment on the influences on the granulation of sludge caused by the change of the concentration of sewage,we find that the diameter of granule that is controlled by the amount of nutrition that enters into the inner of granule in the course of the transferred matter becomes greater with the raise of the concentration of supplying sewage.Thus the concentration of supplying water should appropriately be improved on the grounds of the removal level of COD.The nutrition should be supplied timely in accordance with the increasing number of microorganism,as a result,it promotes granular speed and shortens the time of cultivating granular sludge;at the same time,the situation that too much fast growth of microorganism is caused by the sharp change of the concentration of supplying water and leads to the structure of sludge loosing and the settlement properties declining is avoided.更多还原