Case study: Ostara Nutrient Recovery Technologies shows how venture capital firms and entrepreneurs can work with utilities on innovation.

Water utilities have struggled to dip their toe into corporate venturing as most companies are state-owned, but as parts of the water treatment and deliver networks are privatised there is growing interest in using technology to help improve services.

Even as recently as three years ago, however, venture capital firms and utilities were struggling to find ways to help each other.

Stephan Dolezalek, managing director at US-based venture capital firm VantagePoint Venture Partners, in a 2007 Earth2Tech news article…