Pasteurisation of Sludge
The heating and concentration of waste water streams and sludge is an essential process in many industries, not just water treatment. In particular pasteurisation of sewage sludge and digestate (biosolids) to make them biologically safe for further processing, disposal or use is a key process.
Two common issues with some other sludge pasteurisation systems are their inherent inefficiency and fouling of the heat exchanger tubes due to the nature of the sludge or waste water material. HRS Heat Exchangers overcomes the fouling issues by using its corrugated tube in tube technology as found in our DTI Series, together with cleaning-in-process (CIP) technology where necessary.
More importantly, we produce dedicated multi-tank sludge pasteurisation systems (DPS) which offer numerous benefits over other systems. As well as reducing fouling and keeping maintenance requirements to a minimum, HRS pasteurisation units recapture the energy used in the cooling section of the heat exchanger for use in the initial heat up. This means that HRS sludge pasteurisation units are up to 70% more efficient than the traditional single tank ‘heat jacket’ pasteurisation systems.
Using multiple treatment tanks in our digestate pasteurisation system means that pasteurisation does not slow down your overall process. One tank can be filled (or filled and emptied) while another is holding the sludge at the correct pasteurisation temperature for the required amount of time.
HRS DIGESTATE PASTEURISATION SYSTEMS ARE SUITABLE FOR THE FOLLOWING APPLICATIONS:
- Wastewater treatment
- Sewage sludge and biosolids treatment
- Other effluents
- Biogas feedstock pasteurisation
- Pasteurising digestate from biogas production
Food & agricultural applications:
- Pasteurising food and agricultural wastes