NOVELTY - A production apparatus of polyhydroxy alkanoate (1) has a microorganisms holding component (11-14) for supporting polyhydroxyalkanoate accumulated bacteria, a microorganisms holding component drive device (20) which performs taking-out out of immersion in a waste drain of microorganisms holding component, and a control apparatus (30) which controls drive of the microorganisms holding component drive device. The control apparatus drives the microorganisms holding component drive device, and immerses the microorganisms holding component during a specified time in waste drain.    USE - Apparatus is used for producing polyhydroxy alkanoate (claimed). Can also be used for real waste water treatment.    ADVANTAGE - The polyhydroxy alkanoate is economically produced using the apparatus. The content of polyhydroxyalkanoate in activated sludge is increased without controlling organic substance concentration in waste drain.    DETAILED DESCRIPTION - A production apparatus of polyhydroxy alkanoate has a microorganisms holding component for supporting polyhydroxyalkanoate accumulated bacteria, a microorganisms holding component drive device which performs taking-out out of immersion in a waste drain of the microorganisms holding component and waste drain, and a control apparatus which controls drive of the microorganisms holding component drive device. The control apparatus drives the microorganisms holding component drive device, and immerses the microorganisms holding component during a specified time in waste drain. The polyhydroxyalkanoate accumulated bacteria ingest an organic substance in waste drain. An anaerobic processing is carried out in which the polyhydroxyalkanoate accumulated bacteria converts organic substance into polyhydroxy alkanoate, and accumulation is performed. The control apparatus drives the microorganisms holding component drive device, takes out the microorganisms holding component out of a waste drain, and exposes to specified time in-air. An aerobic treatment is carried out in which the polyhydroxyalkanoate accumulated bacteria consume polyhydroxy alkanoate, and propagation is performed. The control apparatus controls the microorganisms holding component drive device, performs repeatedly the anaerobic processing and aerobic treatment in multiple times, raises the ratio of polyhydroxyalkanoate accumulated bacteria in activated sludge formed in the microorganisms holding component, and raises content of polyhydroxy alkanoate in an activated sludge. An INDEPENDENT CLAIM is included for production of polyhydroxy alkanoate, which involves immersing the microorganisms holding component in waste drain for specified time, ingesting organic substance in waste drain, carrying out anaerobic processing process, performing aerobic-treatment, repeating the anaerobic processing process and aerobic-treatment process for several times, raising ratio of polyhydroxyalkanoate accumulated bacteria in the activated sludge formed in the microorganisms holding component, and increasing content of polyhydroxy alkanoate in activated sludge.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of production apparatus of polyhydroxy alkanoate.    Production apparatus of polyhydroxy alkanoate (1)    Microorganisms holding component (11-14)    Microorganisms holding component drive device (20)    Control apparatus (30)