Harvest Power, a company that makes energy and fertilizer products from organic waste, added $6 million to its series B, $51.7 million round, with Rabobank's SAM Private Equity group, which focuses on sustainability investing and is based in Zurich, Switzerland, joined the company's other backers: Generation Investment Management, DAG Ventures, Keating Capital, Kleiner Perkins, Waste Management (NYSE: WM), Munich Venture Partners, and TriplePoint Capital. As Harvest Power CEO Paul Sellew told TechCrunch in March, the company will put the capital into building two, large biomass renewable energy projects...