SLUDGE HYGIENISATION SYSTEMS FOR WASTEWATER TREATMENT PLANTS

We supply complete sludge hygienisation systems with capacities ranging from approximately 1 to 60 m³/h, designed for mixing dewatered sludge with lime or another hygienising agent. We select the size of the system, the capacity of individual units and the method of dosing the hygienising agent according to the type of sludge and the required process parameters.

We manufacture the main equipment forming part of the system: silos for the hygienising agent, component feeders, screw conveyors and sludge mixers. This allows us to adapt individual units to the specific process line and integrate the system into the equipment of a new or modernised wastewater treatment plant.

Sludge hygienisation system

 

During the hygienisation process, dewatered sludge is mixed in specified proportions with lime or another hygienising agent. The dosage of the agent is selected according to the type of sludge and the required degree of hygienisation.

Adding an appropriate quantity of hygienising agent to the sludge can, among other effects:

• reduce the number of pathogenic organisms,
• increase the dry solids content of the sludge,
• reduce the content of organic compounds,
• immobilise certain metals present in the sludge,
• improve the handling and transport properties of the sludge.

What does a sludge hygienisation system consist of?

 

We configure the complete system from equipment responsible for storing and dosing the hygienising agent, conveying dewatered sludge, mixing both components and removing the prepared mixture. A typical system includes:

• hygienising agent storage silo – for storing lime or another bulk material,
• component feeder – responsible for controlled dosing of the hygienising agent,
• electric vibrator – facilitating material flow and silo discharge,
• hygienising agent screw conveyor – conveying the component towards the mixer,
• sludge dewatering unit – producing dewatered sludge,
• dewatered sludge screw conveyor – transferring sludge to the mixer,
• sludge mixer – for thoroughly combining the sludge with the hygienising agent,
• treated sludge conveyor – removing hygienised material from the mixer.

How does the sludge hygienisation system work?

 

The hygienising agent stored in a ZK silo is supplied by a feeder. A screw conveyor then transports the measured quantity of material to the mixer.

At the same time, dewatered sludge is transferred from the dewatering unit by a separate conveyor. In the sludge mixer, the required quantity of sludge is combined with the hygienising agent to obtain a homogeneous mixture.

After mixing, the hygienised sludge is conveyed by another conveyor to a container, trailer or another designated collection point.

Materials used for system equipment

 

The hygienising agent silo, feeder and conveyor transporting lime can be manufactured from carbon steel. Components operating directly with dewatered or mixed sludge – the conveyor supplying sludge to the mixer, the mixer itself and the conveyor removing the prepared mixture – are manufactured from acid-resistant stainless steel.

Automatic system control

 

The equipment forming part of the sludge hygienisation system is controlled automatically in cooperation with the sludge dewatering unit. This allows the dosing of the hygienising agent, conveying of dewatered sludge, mixer operation and removal of the prepared mixture to be synchronised.

At the operator’s request, the system can also be switched to manual control. This facilitates operation of individual units as well as inspection and servicing activities.

Technical parameters of the sludge hygienisation system

 

Parameter	Value / version
System capacity	approx. 1–60 m³/h
Hygienising agent	lime or another selected agent
Control mode	automatic / manual
Integration	with a sludge dewatering unit
Sludge mixer and sludge conveyors	acid-resistant stainless steel

Systems adapted to a specific process line

 

We select the system configuration according to the required capacity, type of sludge, dewatering method and hygienising agent used. As a manufacturer of the main equipment forming part of the system, we can adapt its parameters, installation arrangement and integration with the other elements of the process line.

The supplied installation can therefore form a complete system covering storage and dosing of the hygienising agent, conveying of dewatered sludge, mixing and removal of the material after the hygienisation process.