Multistage aeration biofilter for water quality purification and purification technique thereof
A biological aerated filter, water purification technology, applied in water/sewage multi-stage treatment, biological water/sewage treatment, filtration treatment, etc., can solve nitrogen pollution treatment effect is not good enough, natural water pollution, limited amount of treated water, etc. problems, to achieve the effect of enhancing sewage treatment effect, improving effluent water quality, treatment effect and energy saving
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[0030] In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.
[0031] Such as Figure 1~2 As shown, a multi-stage biological aerated filter for water purification includes a preliminary filter group 2, a filter body 3 and a membrane bioreactor 4 connected in series through a water pipe 1 in sequence, and the filter body 3 Contains a number of reaction zones connected in series in sequence, wherein the first-stage reaction zone adopts the upward flow method of water inlet at the lower end and water outlet at the upper end, and the second-stage reaction zone adopts the downward flow method of water inlet at the upper end and water outlet at the lower end. For the upflow mode and the downflow mode to be carried out alternately, the reaction zone is an anoxic zone 31 or an aerobic zone 32, wherein the first-order reaction zone...
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