Papers by Author: You Han Wang

Abstract: The paper studied the removal rate of COD under the impact of an instantly big flow of wastewater, and restoring capacity of bio-film after the impact in order to provide data to simulate disorderly discharged sewage in tidal rivers. At 2h after rising tide, the concentration of COD in the dosing pool was 187mg/L and the removal rate of COD was 33.2%. The removal rate of COD before the impact was similar to that after the impact, which indicated that bio-film had the adaptive ability. At 2h after ebb tide, the removal rate of COD was 30.7% after the impact in the dosing pool. The removal rate of COD was 32.0% before the impact in the dosing pool. Compared to the removal rate of COD before the impact, the removal rate of COD after the impact slightly decreased and the reason was that multiple enzyme stimulant had the positive effect on restoring capacity of bio-film.

Abstract: The paper studied the effect of water flow pattern on the treatment of disorderly discharged sewage in tidal rivers by bio-film process. The results indicated that biomass was greater under the fluctuation turn flow than under the folding flow around. Under the fluctuation turn flow, the concentration of COD was 168mg/L and the removal rate of COD was 37.1%. Under the folding flow around, the concentration of COD was 187mg/L and the removal rate of COD was 29.4%. The results indicated that the removal rate of COD was higher 7.7% under the fluctuation turn flow than under the folding flow around. The reason was that under the fluctuation turn flow, soft packing fiber was derided by water, and the effective use of surface area was great and microbial growth space was large.