Sludge Management

Sludge processing represents an important step in the wastewater treatment process. At present, there are two equipment types or in a better way – two possibilities of sludge processing. The first one is the so called “spiral dehydrator”, i.e. the equipment used for sludge thickening and subsequent dewatering. The second possibility is the process of Aerobic Thermophilic Stabilization (ATS), in other words the “sludge stabilisation process”, during which bacteria and viruses are wiped out and a valuable fertiliser prepared out of the sludge.



The AS-DEHYDRATOR is used for the thickening and subsequent dewatering of sludge. The equipment is small and lightweight and can work in automatic operation with minimal maintenance requirements. The device guarantees the thickening of activated sludge to at least 18% of dry matter, for sludge from municipal WWTPs.

Photo: Decanter centrifuges

Decanter centrifuges

Decanter centrifuges are designed for the separation of solid and suspended parts from liquids. The centrifuges are used in wastewater treatment plants (“WWTP”), the food and chemical industries and in agriculture.

Photo: Aerobic Thermophilic Stabilization (ATS)

Aerobic Thermophilic Stabilization (ATS)

Sludge stabilization is a process in which organic substances are degraded. When the ATS technology is used, this reaction is carried out with the use of aerobic microorganisms. In this process, energy is released from sludge, causing heating up to more than 50° C. In this way such high speeds of degradation of organic substances are achieved that 7 - 9 days of storage suffice for the process. The metabolism of aerobic organisms leads to the inactivation of pathogenic bacteria and viruses, i.e., to hygienisation, and therefore a valuable fertilizer can be obtained.