厌氧颗粒污泥悬浮床反应器的研究与应用

Research and application of anaerobic granular sludge suspended bed reactor

提出厌氧复合循环颗粒污泥悬浮床反应器的新型反应器理论。通过引入分级三相分离器，使悬浮床反应器上部处理区液体和沼气的上升速度大大降低，创造了污泥颗粒沉降的良好环境。底部利用高负荷产生的沼气形成内循环，同时设置外回流系统，内、外循环实现了进水与颗粒污泥间的充分接触及保持了良好的反应条件，创造了大幅度提高CODCr容积负荷的条件。对反应器的启动、运行和在不同负荷条件下的去除效果和悬浮流态进行了研究。研究表明，厌氧颗粒污泥悬浮床反应器处理淀粉废水，可在负荷30-40kgCODCr／（m^3·d）条件下稳定运行，最高负荷达57．2kgCODCr／（m^3·d），平均CODCr去除率可达90％。

Concept of stepped tri-phase （gas-liquid-solid） separation was introduced to the anaerobic multiple recycling sludge granular suspended bed reactor and favorable sludge granular settling circumstance was created in the new reactor based on this theory. Best condition to massively increase the organic load of the reactor was produced by right of the sufficient contact of the inlet liquid and the granular sludge, which was created by the inner circulation formed by the biogas of high load in the bottom of the reactor and the external circulation formed by the installed external reflux system. The startup, performance and organic matter removal effect under different loads of industrial granular sludge suspended bed were roundly reviewed, whose flow pattern was researched also. The research results showed： when anaerobic granular sludge suspended bed reactor treated starch wastewater, the reactor could run steadily at the load of 30-40 kgCODcr/ （m^3·d）, the highest load was 57.2 kgCODcr/（m^3·d）,and the average removal of CODc, was 90%.