Sludge Pre-thickener and Automatic Sludge Thickener "AZK"
FeaturesProduced excess sludge in wastewater treatment plants is stored and it is desirable to have minimum water content. Sludge pre-thickener is used for sludge dewatering to ca. 2 – 3 weight percentage, automatic sludge thickener AZK dewaters sludge to ca. 10 – 20 weight percentage.
Benefits1. Discharge of excess sludge from oxical aeration compartment: When discharging the excess sludge from oxical aeration compartment polyphospates are removed from sludge water in a greater extent and thus it reduces phosphate content in the whole treatment process.
2. Excess sludge is discharged with higher concentration than the operational concentration exists: Operational concentration of activated sludge of common sewage treatment plant ranges from 2 – 5 g/l, the pre-thickener makes the concentration up to 20 – 30 g/l. Less amount of sludge water is pumped off, which results in less demand of polycoagulant in further dewatering.
3. Application of automatic sludge thickener: Automatic sludge thickener makes sludge concentration to 10 – 20 weight percentage. No special filter clothes are needed. The equipment is fitted with a metal filter and thickened suspension is pumped out to a container.