厌氧及好氧条件下盐度对海杆菌NY-9生长及反硝化能力的影响

Effect of Salinity on Growth and Denitrification of Marinobacter NY-9 under Anaerobic and Aerobic Conditions

从盐城市射阳盐场分离筛选出的一株中度嗜盐兼性厌氧海杆菌（Marinobacter）NY-9，该茵在厌氧及好氧条件下均表现出高效的反硝化能力。研究考察了厌氧及好氧条件下盐度对一株海杆菌NY-9生长及反硝化能力的影响。结果表明．菌株该菌株的厌氧及好氧生长盐浓度范围分别为O％～16％及0％。12％。最适生长盐度均为8％，该盐度下培养72h，OD600mm。值分别达到了0.38及1．12。在最适盐度条件下，该菌株均取得了最高的厌氧及好氧反硝化效率．在NO3-起始浓度为100mg／L的反硝化溶液中培养72h，其总氯去除率分别达到了87．6％及62．5％。

A moderately halophilic and facuhative anaerobic Marinobacter NY-9 isolation from Sheyang sahworks in Yancheng city. This strain has efficient denitrification under anaerobic and aerobic conditions. The effects of salinity on growth and denitrification of Marinobacter NY-9 under anaerobic and aerobic conditions were studied. The results showed that the strain NY-9 could survive at certain salinity. The suitable salinity was ranged from 0% to 16% and 0% to 12% under anaerobic and aerobic conditions. The optimal salinity range for growth was 8%. The OD600 value after 72 h culture reached the maximum 0.32 and 1.12. Under the optimal salinity, strain NY-9 had the highest efficiency of anaerobic and aerobic denitrifying. The TN removal efficiency after 72 h culture exceeded 87.6% and 62.5% when the concentration of nitrate was about 100 mg/L.