Whatever happened to algae and biofuels? : Biofuels Digest. Sapphire Energy, among other hardy survivors, press forward, as others melt away or re-focus on higher-value, smaller-market products. You remember algae biofuels, don’t you? The Summer of Algae 2009 was the ‘summer of algae,” when it seemed that every other day, there was another Mom-and-Pop, or [...]