SEWAGE PERFORMANCE OF A NEW TYPE OF FLAP FILTER

AUTOR(ES)
FONTE

Eng. Agríc.

DATA DE PUBLICAÇÃO

2021-04

RESUMO

ABSTRACT The drainage performance of a mesh filter determines the water consumption degree of the filter and the efficiency of the next work cycle. Through analysis, we found that the influent flow rate and the sediment content of the influent were important influencing factors. This experiment focused on the drainage time, pressure difference, and cleanliness to investigate the drainage performance of a new type of flap filter. The results showed that with increasing inlet flow rates, the time to discharge the effluent decreased, and the time required for the difference between the primary and secondary sewage pressures to reach a constant level was shorter. The cleanliness and drainage effects were improved. To verify this, we established mathematical models of sewage discharge time, sewage pressure difference, and sewage cleanliness based on the mass conservation law. The results showed that the relative error between the fitting calculation results and the experimental results was small, and the formula fit was over 95%. In the actual work, to achieve efficient sewage discharge under the condition of low sewage discharge and low water consumption, the discharge flow rate was set to 180 m³ h-1, and the sewage discharge time was set to 50 s. Under this condition, the sewage cleanliness reached above 97%.

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