The effects of the return sludge ratio and the return mixed liquid ratio on the removal of nitrogen and phosphorus were studied in the modified A2/O process.
重点介绍了坂雪岗污水处理厂的复合改良A2/O工艺的运行方式及除磷效果，并分析了实际运行中存在的问题及工程设计时的注意事项。
The effects of the return sludge ratio and the return mixed liquid ratio on the removal of nitrogen and phosphorus were studied in the modified A2/O process.
重点介绍了坂雪岗污水处理厂的复合改良A2/O工艺的运行方式及除磷效果，并分析了实际运行中存在的问题及工程设计时的注意事项。
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