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采用一种新型轻质多孔性载体，研究了内循环生物流化床的水力特性。结果表明，在降流区接近于推流式，而升流区接近于完全混合式，整个反应器可以模拟为一个推流式和一个完全混合式的串联。随着下向流速增加，膨胀率和回流比呈正比增加。该系统对ＮＨ＋４－Ｎ去除率达９０％以上，容积负荷最大为２ｋｇＮ／（ｍ３·ｄ），出水稳定，抗冲击能力强。循环速度和通气量对处理效果有较大影响。
A novel lightweight porous carrier was used to study the hydraulic characteristics of an internal circulating bio-fluidized bed. The results show that the downflow zone is close to the plug flow type, while the upflow zone is close to the fully hybrid type, and the entire reactor can be modeled as a plug flow type and a fully hybrid series. As the downflow velocity increases, the expansion ratio and the reflux ratio increase in direct proportion. The system has a removal rate of more than 90% for NH+4-N and a maximum volume load of 2kgN/(m3·d). The water is stable and has strong impact resistance. The circulation speed and ventilation have a great influence on the treatment effect.