| 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。 |
| 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 |
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| 基金项目:国家科技支撑计划项目(2006BAD09A03)、国家863计划项目（2006AA100305）和科技部农业科技成果转化资金项目（2007GB23260387）共同资助 |
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| Ammonia removal by bio-film and its impact factors in recirculation aquaculture systems |
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| Abstract: |
| 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. |
| Key words: Re-circulating aquaculture systems Bio-filter Bio-film formation Impact factors Hydraulic retention time (HRT) |
