Anaerobic Digestion

There are now over 200 operational digesters in the UK incorporating Monsal technology.

Anaerobic Digestion (AD) is the preferred stabilisation process for the treatment of wastewater sludges and organic wastes. The process provides volume and mass reduction and delivers valuable renewable energy with biogas production.

Anaerobic digestion is a naturally occurring biological process comprising the following key steps:

• Enzymic Hydrolysis – large molecules/polymers such as polysaccharides and proteins are converted to smaller compounds
• Acidogenesis – conversion of small compounds to Volatile Fatty Acids (VFA) by anaerobic digestion
• Methanogenesis – Volatile Fatty Acids are broken down by methanogenic bacteria to methane and CO2

Monsal's Anaerobic Digestion Technology can be supplied as either equipment/systems packages for process units such as heating, mixing, pasteurisation and biogas handling plant, through to complete digestion projects. We provide a full suite of services and technology for new build or refurbishment of existing plants.

Monsal has particular expertise in the provision of advanced digestion technology including:

• handling and digestion of thicker sludges,
• high temperature pre-treatment processes,
• biological pre-treatment processes,
• biogas cleaning,
• CHP integration and optimisation,
• treatment of digestate liquors and
• production of high quality biosolids or residuals for recycling.

Pre-treatment reactors and digesters can be configured to meet Treated or Enhanced standards for wastewater sludges or fully comply with Category 3 ABPR for the treatment of organic waste.

Our highly skilled teams can advise on projects from conceptual design through construction, testing and commissioning. We can work with you to provide robust advanced anaerobic digestion infrastructure for your water or waste project.