In the first half of 2016 Cambi received a signed contract from MWH Treatment Limited, for the delivery and installation of 3 lines of Cambi THP B6 – 4 reactor system and sludge coolers for cooling of hydrolysed sludge prior to digestion at Minworth STW plant in Birmingham.
Minworth STW treats sludge from the equivalent of 2.5 million people. The Cambi system is designed to treat 70,000 tonnes ds (dry solids) of sludge per year with a peak of 250 tds per day.
The site has 12 digesters in use with over 60,000m3 total capacity and has a large CHP (cogeneration) system that can generate over 8 MW continuously. More recently a gas to grid system was installed that produces up to 750 m3/hour of biomethane.
The sludge from Minworth used to contain a substantial amount of industrial impurities therefor it was burnt at a nearby incinerator. After the recent cleanup of the industrial inputs, it was decided to make beneficial use of the sludge in agriculture and to shut down the aging incinerator.
The benefits of adding Cambi THP at this stage are:
- Much better dewatering expected to exceed 30% DS – they only get 22% DS currently – cake quantity will be greatly reduced
- Class A product gives them more security now they have shut down their incinerator
- Low odour, compost-like cake product with more secure final disposal to agriculture.
- More import capacity including glycerol – so more biogas
- Improved biogas yields, integrated with Gas to Grid project where biogas has high value
MWH is one of the world’s largest providers of water, environmental, infrastructure and energy services. MWH is an employee-owned global business with 170 offices and 8,000 staff worldwide. More than 2,000 of those staff are in the UK. MWH Treatment is the specialist Constructor’s arm of the business providing long-term solutions and assured delivery.
Cambi is the leading provider of technologies for conversion of biodegradable material to renewable energy, bio-fertilizer resources and biofuel, this being based on Cambi’s patented thermal hydrolysis process (CambiTHP®).