Main malodor pollutants from oil separator of Refinery A are hydrocarbons and a small quantity of sulfides. Main malodor pollutants from surface aeration tank of Refinery B are sulfides, especially CH 3SH. And main ma...Main malodor pollutants from oil separator of Refinery A are hydrocarbons and a small quantity of sulfides. Main malodor pollutants from surface aeration tank of Refinery B are sulfides, especially CH 3SH. And main malodor pollutants from bubbling aeration tank of Refinery C are also sulfides, of which H 2S concentration is the highest. Catalytic combustion technology is applied to treat malodorous gas from oil separator of Refinery A, in which the total hydrocarbon removal was over 97%. The purified gas meets the national standard. Activated carbon adsorption is used to treat malodorous gas from surface aeration tank of Refinery B, and main pollutant CH 3SH removal reached up to 98%~100%. As for malodorous gas from bubbling aeration tank of Refinery C, bio packing tower is used and the removals of hydrogen sulfide, organic sulfides and benzene series reached up to 80%~98%.展开更多
Biological aerated filters have many advantages such as small volume and high treatment efficiency. This research focused on sewage treatment performance of integrated biological aerated filter (IBAF) under different ...Biological aerated filters have many advantages such as small volume and high treatment efficiency. This research focused on sewage treatment performance of integrated biological aerated filter (IBAF) under different conditions such as aeration, hydraulic retention time and the height of fillers layer, to identify the turn of marked affecting factor of removal performance through orthogonal experiments, optimize the function parameter of IBAF, reveal the regularity of sewage treatment of IBAF under different conditions, and adopt suitable measures to guarantee excess water quality of IBAF.展开更多
The optimum media height of carbon oxidation and nitrification in a down-flow biological aerated filter was determined, and the distribution of the heterotrophic and nitrifying populations through studying the changes...The optimum media height of carbon oxidation and nitrification in a down-flow biological aerated filter was determined, and the distribution of the heterotrophic and nitrifying populations through studying the changes of organic carbon contents and ammonia concentration at different media height was got. The results showed that as a down flow BAF with granular media, the active layer of nitrifiers was deeper than heterotrophs in BAF. And the optimum media height for the removal of SS, COD Cr and NH + 4-N was 40 cm,60 cm and 80 cm respectively. The removal efficiency of SS, COD Cr and NH + 4-N was 79.1%, 63.9% and 96.4% respectively under the influent COD Cr and NH + 4-N of 122.1 mgCOD Cr /L and 14.84 mgNH + 4-N/L, the influent flux of 15.8 L/h, air to liquid ratio of 3∶1.展开更多
文摘Main malodor pollutants from oil separator of Refinery A are hydrocarbons and a small quantity of sulfides. Main malodor pollutants from surface aeration tank of Refinery B are sulfides, especially CH 3SH. And main malodor pollutants from bubbling aeration tank of Refinery C are also sulfides, of which H 2S concentration is the highest. Catalytic combustion technology is applied to treat malodorous gas from oil separator of Refinery A, in which the total hydrocarbon removal was over 97%. The purified gas meets the national standard. Activated carbon adsorption is used to treat malodorous gas from surface aeration tank of Refinery B, and main pollutant CH 3SH removal reached up to 98%~100%. As for malodorous gas from bubbling aeration tank of Refinery C, bio packing tower is used and the removals of hydrogen sulfide, organic sulfides and benzene series reached up to 80%~98%.
文摘Biological aerated filters have many advantages such as small volume and high treatment efficiency. This research focused on sewage treatment performance of integrated biological aerated filter (IBAF) under different conditions such as aeration, hydraulic retention time and the height of fillers layer, to identify the turn of marked affecting factor of removal performance through orthogonal experiments, optimize the function parameter of IBAF, reveal the regularity of sewage treatment of IBAF under different conditions, and adopt suitable measures to guarantee excess water quality of IBAF.
文摘The optimum media height of carbon oxidation and nitrification in a down-flow biological aerated filter was determined, and the distribution of the heterotrophic and nitrifying populations through studying the changes of organic carbon contents and ammonia concentration at different media height was got. The results showed that as a down flow BAF with granular media, the active layer of nitrifiers was deeper than heterotrophs in BAF. And the optimum media height for the removal of SS, COD Cr and NH + 4-N was 40 cm,60 cm and 80 cm respectively. The removal efficiency of SS, COD Cr and NH + 4-N was 79.1%, 63.9% and 96.4% respectively under the influent COD Cr and NH + 4-N of 122.1 mgCOD Cr /L and 14.84 mgNH + 4-N/L, the influent flux of 15.8 L/h, air to liquid ratio of 3∶1.