The group was established in 2005 and provides both financial backing and management resources to small private developers and universities.

Grant Thornton Corporate Finance is the company’s nominated adviser for the placing, and Fairfax is its broker.

Chris Every, chief executive of Nviro Cleantech, says: ‘Clean technogies are a central part of a new industrial shift to reduce pollution, emissions or waste streams. We look forward to joining the AIM market just as these trends are forcing many countries and corporations to examine new technologies, more stringent regulations and consumer behaviour.’

The two foremost technologies of the five in Nviro Cleantech’s portfolio are Vertus RTP, which removes contaminants from coal to produce ‘clean fuel’, and Microrelease, which recycles wood fibre.