Haloferax　mediterranei　is　an　extremely　halophilic　archaeon　that　is　able　to　synthesize　polyhydroxyalkanoate　(PHA)　in　high　salt　environment　with　low　sterility　demand.　In　this　study,　a　mathematical　model　was　validated　and　calibrated　for　describing　the　kinetic　behavior　of　H.　mediterranei　at　15,　20,　25,　and　35　A　degrees　C　in　synthetic　molasses　wastewater.　Results　showed　that　the　production　of　PHA　by　H.　mediterranei,　ranging　from　390　to　620　mg　h(-1)　L-1,　was　strongly　dependent　on　the　temperature.　The　specific　growth　rate　(A　mu　(max)),　specific　substrate　utilization　rate　(q　(max)),　and　specific　decay　rate　(k　(d))　of　H.　mediterranei　increased　with　temperature　following　Arrhenius　equation　prediction.　The　estimated　activation　energy　was　58.31,　25.59,　and　22.38　kJ　mol(-1)　for　the　process　of　cell　growth,　substrate　utilization,　and　cell　decay　of　H.　mediterranei,　respectively.　The　high　temperature　triggered　the　increased　PHA　storage　even　without　nitrogen　limitation.　Thus,　working　at　high　temperatures　seems　a　good　strategy　for　improving　the　PHA　productivity　of　H.　mediterranei.