饮用水生物滤池中亚硝酸盐氧化细菌的生长规律

GROWTH OF NITRITE OXIDIZERS IN BIOLOGICAL FILTERS FOR DRINKING WATER TREATMENT

饮用水生物滤池工艺中亚硝酸盐氧化细菌的生长状况可以作为反应器挂膜是否成功的标志 ,其生长具有明显的阶段性 ,在经历了延迟期和对数期之后进入稳定期 ,由于氨氧化细菌和亚硝酸盐氧化细菌在生态学上存在以后者为受利方的偏利互生关系 ,延迟期后期与氨氧化细菌的对数期生长相对应 ,表现为表观去除率的“对数下降”期 .亚硝酸盐氧化细菌对数期生长的时间在 1mo左右 ;低温可以使其长期处于延迟期 .图 7表 3参

The growth of the nitrite oxidizers in the biological filters for drinking water treatment can be used as the indicator of the accomplishment of biofilm-attachment. The growth could be evidently divided into lag phase, log phase and stationary phase. Because commensalism existed between ammonia oxidizers and nitrite oxidizers and the latter was the advantage-taker, the late lag phase behaved as the ”logarithmically declining” phase of the pseudo removal rate corresponding to the log phase of ammonia oxidizers. The log phase of nitrite oxidizers lasted about one month and low temperature could make them under the lag phase for a long time. Fig 7, Tab 3, Ref 12