The Cambi Process at Biovakka

The Cambi Process at Biovakka

Biovakka Suomi Oy in Turku, Finland, produces heat, electricity and fertilizer from sludge and waste. When building a new bio-waste plant, tremendous effort was made to make it an efficient and safe workplace. To ensure maximized uptime and biogas output, Biovakka chose the Cambi process for sludge treatment and Kiwa Inspecta for safety inspections.

Extremely high safety requirements

Cambi´s Thermal Hydrolysis Process (THP) is a high-pressure steam pre-treatment for the anaerobic digestion of sludge and bio-waste.

The sludge is heated to 160˚C with steam at 6 bar pressure. According to the Pressure Equipment Directive 97/23/EC, this meant that Biovakka´s equipment had to be inspected.

“Imagine if a pressure relief valve didn’t open as intended, the kind of pressure that could build up and the damage that could do. We need external help with inspections, and the requirements we place on those we choose as a partner are extremely high,” says Stefan Sandbacka, Cambi’s agent in Finland who works closely with Biovakka.

Supreme availability

Kiwa Inspecta is authorised to perform testing and certification by a national accreditation body, in compliance with international assessments within the framework of the European cooperation for Accreditation (EA). As an accredited body in accordance with the Pressure Equipment Directive 97/23/EC, Kiwa Inspecta offered exactly the solution Biovakka asked for – and more.

“Kiwa Inspecta more or less managed the whole process. Everything was scrutinized. During the construction we had some problems with late deliveries and needed Kiwa Inspecta’s services straight away. Twice it was even during the weekend!” says Stefan Sandbacka. “But Kiwa Inspecta was always able to provide us with qualified personnel, so we could proceed without further delay. One can’t help being impressed.”

Flexibility for future growth

“Kiwa Inspecta have the expertise, but are still very flexible. Exactly the kind of partner we need in order to grow in the future,” says Janne Lehtonen, Manager at Biovakka.