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Anoxic/aerobic (A/O) membrane bioreactor (MBR) process, which is based on the MBR technic, is an effective method of wastewater treatment. In this study, two chief operation indexes of A/O MBR system are studied and optimized. The final results shows that, under the operation condition that the HRT rate between anoxic and aerobic zone is 1:3 (which in this system is: 4.5h in aerobic zone, 1.5h in...
To decrease further the footprint of common anoxic-oxic submerged membrane bioreactor (A-O SMBR), a vertical structure on A-O SMBR was introduced in this paper. A nylon screen (NS) was placed in the oxic zone together with hollow fiber membrane (HF). With the reactor working, sludge flocs adsorbed on the NS surface and formed a "dynamic membrane" gradually, which could intercept pollutants...
An Anoxic/Aerobic Membrane Bioreactor (A/O-MBR) system have been developed to improve the efficiency of nutrient removal. The important factors those system are the ratio of anoxic zone/aerobic zone (VA:VO), internal recycle rate (IR) and solids retention times (SRT). The optimal ratio of anoxic zone/aerobic zone was 1:3. The IR ratio and SRT for effective nutrient removal were 300% and 30d, respectively...
With the project of sewage treatment in Qingdao Liuting International Airport as the case, through the analysis on pollutant removal effect, effluent quality, investment and costs, feasibility of A/O-MBR process is comprehensively studied from such two aspects as technology and economy. The optimum operation conditions of A/O-MBR process are preliminarily discussed from such two elements as power...
This experiment used A/O industrial filter cloth self-forming dynamic membrane reactor to treat campus domestic sewage, COD removal rate of the effluent was 91%, NH3-N and TN removal rate of the effluent was 92.4% and 88.1% respectively, the average turbidity of the effluent was 2.31NTU. The test results showed that the A/O industrial filter cloth self-forming dynamic membrane reactor had good effect...
An experiment of a reformative MBR process that a combined process of "biological contact oxidation and micro- filtration (MF) membrane" was conducted for the treatment of aquatic products processing wastewater. The experiment results showed that the combined process for waste water the reduction rates of the CODCr reached 95%, and NH4-N was in the range of 40~50%. HRT played an important...
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