Algae Photo Bioreactors (APB`s)

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ALGAE PHOTO-BIOREACTORS (APB’s) Absorption of CO2 and NOx from industrial exhaust gases and conversion of algal feedstock, as a discipline of ecological engineering.

Algae, live in a wide range of aquatic environments and are a natural component of most aquatic ecosystems being found in both fresh, brackish and marine waters. They range in size from large macrophytic kelps to microscopic unicellular, colonial and filamentous algae, known as phytoplankton. They are also the fastest growing plants on earth – ten times faster than trees - with the more efficient species doubling their volume every 6 hours.

Microscopic microalgae, are typically free floating in the water column (planktonic) and encompasses several groups of relatively simple organisms that capture light energy through photosynthesis, using it to convert inorganic substances into organic matter. Photosynthesis is a method used by plants to produce glucose from sunlight, carbon dioxide and water, with oxygen as a waste product. Phytoplankton, have much faster growth-rates than terrestrial crops, their productivity is between two to five times higher, compared with traditional agricultural crops.

There are over 2800 species (and a further 1300 infraspecific taxa) of algae being reported from inland (non-coastal) Australia. An enclosed Algae Photo-Bioreactor (APB) consists of transparent tubes, cylinders or plates that receive a high density culture of algae under daylight conditions, with an option to illuminate the culture to provide greater performance. There is a holding tank, where the substance is continuously pumped around the circuit and where it achieves a regulatory ‘dark phase’. It is screened to harvest mature cells and water borne nutrients (preferably wastewater) are added and adjusted to the culture. The CO2 (82% reduction) and NOx exhaust gases from an industrial power plant are cooled and where the gases are injected into the solution – post, dark phase.

Algae reduces NOx day and night, regardless of temporal and weather conditions (even dying algae can reduce NOx by up to 70 percent). Stephen Bedford Clark fishace ecological engineering 3D animated exhibitions at: - fishace PYE or dave WATANABE office at: etopia eco-village, etopia island (118,102,22) operations at: darke peak zero waste treatment plant, epsilon orionis (55,97,22)

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