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Treatment efficiency and microorganisms' property of polypropylene and zeolite medium coupled in biological aerated filter(BAF) were investigated in this paper. The reactors were operated in parallel with upflow mode using domestic sewage as influent up to BOD5 volumetric loading of 3 kg BOD5??m-3d-1, NH3-N surface loading of 0.5 g NH3-N??m-2d-1, and air/liquid ratio of 10:1 in room temperature. The...
Steady simultaneous nitrification–denitrification (SND) was achieved in a fluidized bed reactor (FBR) by the control of DO concentration without physical separation of the aerobic and anoxic zones. The performance and composition of nitrifying bacteria were examined in this study. The ammonium removal efficiency was higher than 80% and the DO concentration (1–5mgl −1 ) had little influence...
The treatment of municipal-type synthetic wastewater was carried out using a three stages net-like rotating biological contactor (NRBC). The results indicated that, compared with conventional rotating biological contactor (RBC), NRBC have several advantages, such as quick start-up, high biomass concentration and can handle high organic loading rates. The COD and total nitrogen removal rates achieved...
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