中文摘要：

通过对OCO工艺的改进，延伸了C隔墙（60°），并增设活动导流墙替代OCO工艺的调速回流搅拌器，形成了OGO反应器。应用其处理城市污水的试验结果表明，在保持高效去除有机物的前提下，对氨氮、TN的平均去除率分别从OCO工艺的51％、49％提高到74％、63％，对TP的平均去除率由70％提高到78％，系统脱氮效果显著提高。OGO工艺可有效实现混合液无泵水力内回流，明显降低工艺能耗。同时OGO工艺中的污泥性能良好，具有较强的抗低温能力，活性污泥中微生物种群具有较好的稳定性。

英文摘要：

Based on the OCO reactor, a new process called OGO was developed by extending the C partition wall （60°） and setting movable guide-wall in place of the speed-adjustable stirrers. The experimental results of municipal wastewater treatment by OGO show that the removal efficiencies of NH4^＋ - N, TN and TP in OGO raise from 51%, 49% and 70% in OCO to 74%, 63% and 78% respectively under the precondition of high organic matter removal. The effect of nitrogen removal is improved remarkably. The system can realize the automatic return of mixing liquid without pump, so as to reduce the operating energy-consumption greatly. Meanwhile, OGO has strong resistant ability to low temperature with the favorable capability of sludge, in which microorganism population can be formed stably.