Activated sludge and biomembrane combined biological denitrification and dephosphorization treatment process
A technology of activated sludge and biological denitrification, applied in the field of biological denitrification and dephosphorization treatment, can solve problems such as suboptimal, dephosphorization and nitrification interference, and achieve the reduction of floor space, system optimization, and high denitrification and dephosphorization efficiency. Effect
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[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0012] The method diagram of the present invention adopts double sludge system to control the growth of phosphorus accumulating bacteria and nitrifying bacteria respectively, including two stages before and after, and the former stage (A) adopts anaerobic / anoxic / aerobic activated sludge method to promote phosphorus accumulation Bacteria and denitrifying bacteria grow in it, and the latter stage (B) is biofilm method, which promotes the growth of nitrifying bacteria in it. It is characterized in that: the sludge load in the aerobic tank in the activated sludge system in the pre-control stage is greater than 0.2kgBOD / kgMLSS.d, and the sludge sludge age is relatively short (2-10d), making it suitable for phosphorus accumulating bacteria and denitrifying bacteria The growth in it is not suitable for the growth of nitrifying bacteria, and the aerobic state c...
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