Papers by Author: Hong Ying Chen

Abstract: The paper studied the effect of tide on the removal rate of COD, NH₃-N and TP in the dosing pool in order to provide data to simulate disorderly discharged sewage in tidal rivers. Due to the dilute effect of rivers, the removal rate of COD, NH₃-N and TP at the tidal state was higher than that at no tidal state. At the tidal state, the average removal rate of COD, NH₃-N and TP was 60.8%, 55.7%, 55.6%. At no tidal state, the average removal rate of COD, NH₃-N and TP was 57.5%, 47.5%, 8.6%. At the tidal state, the upper bio-film was exposed to air and the activity of microorganism decreased, and the activity of microorganism was high at middle-level bio-film. Therefore, the utilization of bio-film at the tidal state was lower than that at no tidal state. However, due to the tidal action, rivers entered into the dosing pool and the dilute effect of rivers on the pollutants was obvious.

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.

Abstract: The paper studied enhanced treatment of sewage from discharging points of rivers by bio-film process dosing with enzyme and investigated the promotion effect of enzyme on treatment of sewage by bio-film process. The removal of phenol in sewage was also researched. The experiments results indicated that during the ebb tide, the remove rate of phenol was stable (33%) on the eighth day in the dosing pools and it was stable (31.6%) on the eighth day in the contrast pool. During the rising tide, the remove rate of phenol was stable (30%) on the eighth day in the dosing pools and it was stable (27.2%) on the eighth day in the contrast pool. It indicated that enzyme had good promotion effect on bio-film process during the sewage treatment process. Biological accelerator-bio-film process could effectively reduce the impact of sewage on river and it had a good application prospect as the auxiliary means for water restore.

Abstract: The in situ treatment of disorderly discharged sewage by bio-film process with multiple enzymes stimulant was carried out in this study. The removal of the phenol in sewage was studied. The promotion of multiple enzymes stimulant on treatment of sewage by biofilm process was also investigated. The experiments results indicated that during the ebb tide, the remove rate of phenol was stable (88%) on the sixth day in the dosing pools and it was stable (83%) on the seventh day in the contrast pool. During the rising tide, the remove rate of phenol was stable (78%) on the sixth day in the dosing pools and it was stable (74%) on the seventh day in the contrast pool. It indicated that the bio-film process enhanced by dosing multiple enzymes stimulant possessed the promotion effect of pollutant removal. The bio-film process enhanced by bio-stimulant had good performance in treating the wastewater from discharging points of rivers, which had a broad practical application as assistant means of water body remediation.