However, in current main biochemical sewage treatment technology, the aeration devices are the primary energy-consuming equipments, which system costs about 50-70% of the total power consumption.
That is, use coagulation and direct aeration in short time for primarily treatment of domestic sewage, then filter domestic sewage by slag filtration or sands.
即主要通过混凝和短时直接曝气对待处理的生活污水作预处理，然后通过河沙或炉渣滤料进行过滤处理。
3
We use JHX multilevel jet floatation pot as secondary floatation point after aeration pond in oil containing sewage farm of refinery. This paper discusses the feasibility of this method.