Thöni expands its biogas portfolio in the UK : TTV High Solids Anaerobic Digestion Opens a New Chapter for the UK Biogas Sector

Thöni Sustainable Solutions GmbH continues to strengthen its biogas portfolio with key reference projects in the UK.

One of the latest reference projects is the TTV Melton/Hull biogas plant, which brings Thöni’s proven high-solids plug-flow anaerobic digestion technology to the UK market. At the core of the facility is a digester specifically designed for processing the organic fraction of municipal solid waste (OFMSW).

Developed in partnership with Melton Energy Tech Ltd., a subsidiary of Transwaste Ltd., the facility represents an important development for the UK waste and biogas sector. It demonstrates how advanced digestion technologies can be applied to treat contaminated municipal organic waste streams, reduce landfill dependency, and enable renewable energy generation at scale.

The Melton/Hull plant is designed to process up to 57,200 tonnes of OFMSW per year, and to generate approximately 7.9 million Nm³ of raw biogas annually. At the heart of the facility are two TTV2250 plug-flow digesters, applying Thöni’s proven TTV Continuous High Solids Anaerobic Digestion technology.

Unlike conventional CSTR digestion systems, the TTV plug-flow process is designed to operate with dry matter contents of up to 35% within the digester and to handle feedstocks with elevated impurity levels. This design offers several key advantages:

• Robust operation with contaminated municipal feedstocks, supporting high plant availability
• Low parasitic load, contributing to improved overall efficiency and operating economics
• Scalable plug-flow design, proven across European and international reference plants and now applied in the UK

Together, Thöni and Melton Energy Tech have delivered a facility that enables the recovery of renewable energy from challenging waste streams and supports circular economy and energy transition objectives in the UK.

The UK wastes an estimated 10 million tonnes of food every year, representing a resource loss worth £20 billion (Source: WRAP). The TTV Melton/Hull project illustrates how advanced anerobic digestion technologies can help address this challenge by recovering renewable energy from municipal organic waste that would otherwise be lost.

For industry, the Melton/Hull facility represents more than a single project; it serves as an important reference for the UK biogas sector. The plant demonstrates the scalability of Thöni’s TTV technology for OFMSW processing, its integration into biomethane and role within renewable energy value chains.

While recent UK projects focus on Thöni´s TTV Continuous High Solids Anaerobic Digestion technology, the company also offers proven CSTR digestion solutions through its TNV Wet Digestion technology. Numerous CSTR digestion plants have been delivered worldwide, including installations in the UK, with two new plants scheduled two additional plants in the pipeline for grid connection in 2026/2027. This broad technology portfolio allows Thöni to address a wide range of waste streams — from municipal biowaste to agricultural residues — and to develop solutions adapted to local regulatory and operational conditions. 

Thöni is an established technology partner in the field of anaerobic digestion and aerobic digestate treatment technologies. With advanced solutions for sustainable organic waste management and renewable energy generation, the company supports high standards of efficiency, reliability, and environmental performance across diverse project applications.

To learn more about Thöni’s solutions, visit https://www.thoeni.com/en/sustainable-solutions/environmental-engineering/