14 May 2021

Hydrolysis Of Sewage Sludge as Pretreatment Before Anaerobic Digestion


The hydrolysis of sewage sludge and the subsequent anaerobic digestion of the hydrolysed sludge output is becoming increasingly common at many sewage works.

In recent years, as Net-Zero 2050 targets for decarbonization begin to bite, the hydrolysis of sewage sludge and subsequent anaerobic digestion is being seen as a winning combination.

Safe and cost-effective energy extraction and disposal of sewage sludge are, without doubt, some of the most pressing challenges now facing the wastewater industry.

The high cost of energy means that some disposal routes such as incineration are less viable, and others have ceased to be useful due to concerns about their sustainability.

Thermal hydrolysis provides: 

- quicker and better quality biogas production,
- reduced ultimate sludge output and
- surplus energy to power not only the hydrolysis process but the wastewater works as well. 

Correction to "part"! At some super-efficient works, the WHOLE works are powered!




The value of this process has been appreciated for a long while by companies such as CAMBI, Veolia Water   Solutions & Technologies, and Monsal (Now part of GE), who each offer their own systems.

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- sewage sludge hydrolysis 
- sewage sludge treatment 
- sludge management

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