Wastewater sludge dewatering is a new process combining membrane bioreactor technology with biological treatment technology and membrane separation technology. It replaces the secondary sedimentation tank in the traditional process. It can efficiently perform solid-liquid separation and is directly used. Stabilizes the water; it can maintain a high concentration of microbes in the biological pool, with less sludge remaining in the process, extremely effective removal of ammonia nitrogen, effluent suspended matter and turbidity close to zero, and bacteria and viruses in the effluent are largely removed.
When the wastewater sludge is dewatered, the sludge in the sludge tank is transported to the metering tank through the sludge transfer pump, and the amount of mud is adjusted by adjusting the liquid level adjusting tube in the metering tank, and the excess sludge is returned to the sludge through the return pipe. Pool. The sludge and flocculant are mixed in a flocculation mixing tank and thoroughly mixed by a mixer to form a silk flower. The ideal diameter of the silk flower is about 5 mm.
The concentrated sludge continues to advance in the direction in which the screw shaft rotates, and is sufficiently dehydrated under the action of the internal pressure formed by the back pressure plate. The concentrated portion is concentrated by gravity, and a large amount of the filtrate is discharged from the filter slit of the concentrated portion. The dehydrated mud cake is discharged from the gap formed by the back pressure plate and the spiral body. The sludge treatment amount and the moisture content of the mud cake can be adjusted by adjusting the rotational speed of the screw shaft and the gap of the back pressure plate.