This study compares, based on mathematical modelling, continuous-flow activated sludge processes (CAS) and sequencing batch reactors (SBR). The steady-state or periodic steady-state of CAS and SBR processes is compared for a feed composed of readily or slowly biodegradable substrates, for carbon and for carbon and nitrogen removal. The simulations are carried out for different values of the SRT (solids residence time), HRT (hydraulic residence time), number of cycles and internal recycle. If the SRT is large enough, the SBR can remove the influent biodegradable COD completely, while the CAS has a residual effluent COD concentration. For carbon and nitrogen removal, the SBR can remove the ammonia completely while the CAS has a residual effluent ammonia concentration. For typical values of the operating parameters, the CAS gives higher total nitrogen removal than the SBR, which becomes comparable to the CAS only for a large number of cycles per day.

这项研究基于数学建模比较了连续流活性污泥工艺（CAS）和排序间歇反应器（SBR）。比较CAS和SBR工艺的稳态或周期性稳态，以分析由易于或缓慢生物降解的底物组成的进料，碳以及除碳和除氮的情况。针对SRT（固体停留时间），HRT（水力停留时间），循环次数和内部循环的不同值执行模拟。如果SRT足够大，则SBR可以完全去除进水的可生物降解的COD，而CAS则具有残留的出水COD浓度。对于除碳和除氮，SBR可以完全去除氨，而CAS则具有残留的流出氨浓度。对于典型的运行参数值，