Abstract
In these decades, the Earth ecosystem is supposed getting worse by various activities of human society such as a discharge of organic waste from stock farming. Accordingly, the development of an organic resource recycle system that treats such stuff is becoming an important research theme. Present study aims to develop a microalgae biomass production system using livestock waste treated water. We conducted cultivation of a green unicellular microalga Parachlorella kessleri NIES 2160 (P. kessleri) using chicken manure treated water in the laboratory and operating an open microalgae mass culture system of 400 L and 180 L settled in farmeries in Yamanashi Prefecture. P. kessleri cells grew even faster in the treated wasted water than in an artificial inorganic Mayers-4N medium giving 0.18 OD750nm at 7th day of culture. Furthermore, it became clear that a cooling system with river water was crucial to control of the medium temperature in microalgae mass culture system. The algal biomass containing P. kessleri obtained by the algal mass culture system showed a significant positive effect on some leaf vegetables accelerating their growth rate through the irrigation. The human impact on the environment will be reduced by such organic resource recycling systems.
