NOVELTY - Continuous production method of polyhydroxyalkanoate (PHA) from molasses alcoholic wastewater, by adding halophilic bacteria, nutrient solution and alcoholic wastewater to sequencing batch reactor, aerating mixture, precipitating mixture, discharging liquid supernatant, transferring sludge to culture apparatus, again adding halophilic bacteria and wastewater to activated sludge, aerating mixture, discharging liquid supernatant, subjecting activated sludge enriched with halophilic bacteria to continuous flow reactor, and discharging produced PHA and residual sludge.    USE - Continuous production method of PHA from alcoholic wastewater produced after treatment of molasses (claimed).    ADVANTAGE - The method uses mixed halophilic bacterial culture instead of pure bacterial culture for synthesis of the PHA, and hence strict sterilization procedures are not required to be performed, and thus process is simplified and cost is saved. The continuous flow process is simple when compared to existing fermentation process that involves repeatedly changing fermentation liquid during course of wastewater treatment process, and is convenient to control and easy to operate, and enables continuous and high yield production of the PHA, and reuse of the residual sludge.    DETAILED DESCRIPTION - Continuous production method of polyhydroxyalkanoate (PHA) from alcoholic wastewater produced after treatment of molasses using mixed halophilic bacterial culture in an open condition, involves (a) using continuous flow reactor as wastewater treatment device, blast aeration device, sequencing batch reactors (SBR) and culture apparatus for the halophilic bacteria, (b) adding the mixed halophilic bacterial culture, coarse salt containing nutrient solution and alcoholic wastewater to the SBR, sorting out halophilic activated sludge, aerating mixture for 6-10 hours, maintaining dissolved oxygen concentration of more than 3 mg/l, precipitating the mixture for 2-6 hours, discharging liquid supernatant, incubating the supernatant for 30-50 days, and transferring sludge to the culture apparatus when color of the sludge turns from black or brown to light yellow, (c) again adding the mixed halophilic bacterial culture and wastewater to the activated sludge in the culture apparatus, reacting mixture at room temperature and under dissolved oxygen concentration of more than 3 mg/l, aerating the mixture for 20-23 hours, allowing precipitation to occur for 4 hours, discharging liquid supernatant, incubating the supernatant for 20-30 days until halophilic SBR activated sludge concentration reaches more than 3500 mg/l, and subjecting obtained product to acclimation culturing process, (d) subjecting activated sludge enriched with halophilic bacteria to continuous flow reactor from SBR reactor, maintaining salinity of 40-100 g/l in the wastewater, where hydraulic retention time is 12-20 hours, organic load is 0.75-1.25 kg chemical oxygen demand (COD), dissolved oxygen concentration in the aeration rate is not less than 3 mg/l, sludge retention time is 4-6 days, sludge reflux ratio is 200-300%, sludge is treated at room temperature, settling in sedimentation tank is 3-5 hours, and (e) performing continuous flow process for 30-40 days, and discharging produced PHA and residual sludge every day from the secondary sedimentation tank.