The Study of Hospital Wastewater Treatment by Combined Pure-Oxygen Aeration and A/O Process

The field in which pure oxygen aeration is applied to sewage treatment is extensive. In actual application it is more suitable for the degradation of industrial sewage. Pure oxygen aeration has unique merit compared with common air aeration. This article introduced the effect by pure oxygen aeration. The study shows pure oxygen aeration is an effective pollutant removal mechanism, and at the same time proposes the best dissolved oxygen is at 3 mg/l. The average removal rates of CODcr, NH3-N, TN are 73%, 50%, 55% respectively. The conclusion is that pure oxygen aeration for hospital wastewater the CODcr removing rate is higher than ammonia nitrogen and total nitrogen efficiency.