Sludge-containing wastewater treatment method

Abstract

The invention discloses a sludge-containing wastewater treatment method which comprises the following steps: (1) firstly removing large suspended solids in wastewater; (2) lifting the wastewater into an aerated grit chamber, and removing sand, coal cinder and other particles with high specific gravity in the sewage; (3) enabling the sewage to enter a circular primary sedimentation tank to be pre-treated, and removing fine suspended organic matters; (4) enabling the water to enter an aeration tank, enabling the water to enter a circular secondary sedimentation tank to perform mud-water separation, returning partial activated sludge to the aeration tank, disinfecting the effluent in a chlorination contact tank, and discharging the water into a water body through a Parshall flume; (5) mixing the sludge in the primary sedimentation tank, the aeration tank and the secondary sedimentation tank, and enabling the sludge to enter a sludge thickener; and (6) returning the supernatant in the sludge thickener to the primary sedimentation tank to be treated again, treating the sludge containing organic matters by a sludge digestion tank, dewatering the digested sludge by a belt filter press, airing the sludge, and outward transporting the sludge. The treatment method disclosed by the invention has the beneficial effects that the sludge separation rate reaches 80% or higher, and the wastewater emission is higher than the emission standard.

Description

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AI Technical Summary

Benefits of technology

The technical effect of this new technology overcomes previous methods by allowing for better separating rates while also improving how much wasted water can be removed from treated sewage or other sources.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the efficiency at which municipal sewer systems are being built for treatments that require water pollutants removal from liquid effluences such as domestic wastes (sewers). Current methods involve expensive equipment with low separating efficiencies, making it difficult to achieve effective results without increasing costs associated therewith over time.