A backwashing device and method for a light-weight filter material biological aerated filter
A technology of aerated biological filter and lightweight filter material, which is applied in the field of backwashing device, can solve the problems of large effluent treatment volume, high cost, mixed layers of filter materials, etc., so as to ensure the treatment effect, reduce the treatment cost, and reduce the water consumption. amount of effect
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[0049] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0050] Figure 1 to Figure 2 The reference numerals in the figure are: air pump 1; aeration valve 2; second pressure sensor 3; first pressure sensor 4; process water inlet valve 5; backwash drainage valve 6; water distribution layer 7; backwash water pump 9; process water outlet valve 10; partial backwash perforated pipe 11; partial backwash hole 111; partial backwash start valve 12; pool body 100; light filter material layer 101.
[0051] Such as Figure 1 to Figure 2 As shown, a backwashing device of a light filter material biological aerated filter includes a tank body 100, and its sewage flow direction adopts an upflow type, and the tank body 100 is provided with a water distribution layer 7, a light filter material layer 101, Process water inlet valve 5, process water outlet valve 10 and backwash drain valve 6, the process water inlet va...
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