循环水养殖系统生物挂膜的消氨效果及影响因素分析

Ammonia removal by bio-film and its impact factors in recirculation aquaculture systems

中文关键词: 循环水养殖系统  生物滤池  挂膜  影响因素  水力停留时间

英文关键词: Re-circulating aquaculture systems  Bio-filter  Bio-film formation  Impact factors  Hydraulic retention time (HRT)

中文摘要:

      针对工厂化循环水养殖系统，利用海水中的自然净化微生物挂膜，挂膜成功后，形成了很好的硝化作用，进行不同水温、进水氨氮浓度和水力停留时间（HRT）影响因素实验。结果表明，相同的进水氨氮浓度，随着水温的升高，不同水温之间氨氮浓度变化差异显著(P<0.05)。在28 ℃水温时，经过生物膜120 h的净化处理，进水氨氮浓度降低到最低；随着进水氨氮浓度和HRT的增大，氨氮去除率及特殊去除率也不断的增大，但在同一进水氨氮浓度下，氨氮特殊去除率随着水力停留时间的延长反而降低。

英文摘要:

      Bio-film was successfully formed by making use of the natural purifying microbe in the sea for the industrial recirculation aquaculture systems. The nitrification impact factors, including water temperatures, influent ammonia-nitrogen concentrations and hydraulic retention time (HRT) were also explored . The results showed that at the same influent ammonia-nitrogen concentration and HRT, the ammonia-nitrogen concentrations changed significantly at different water temperatures (P<0.05). When the water temperature was 28℃, after purified by bio-film for 120 hours, the influent ammonia-nitrogen concentration dropped to the lowest concentration. The ammonia-nitrogen removal rate and the specific ammonia removal rate were gradually increased as the influent ammonia-nitrogen concentration and HRT increased. However, at the same ammonia-nitrogen concentration, the specific ammonia-nitrogen removal rate decreased as HRT was prolonged.