Wastewater treatment systems are nowadays evolving into systems where energy and resources are recovered from wastewater. This work presents the long term operation of a demo-scale pilot plant (7.8 m³) with a novel configuration named as mainstream SCEPPHAR (ShortCut Enhanced Phosphorus and polyhydroxyalkanoate (PHA) Recovery) and based on two sequencing batch reactors (R1-HET and R2-AUT). This is the first report of an implementation at demo scale and under relevant operational conditions of the simultaneous integration of shortcut nitrification, P recovery and production of sludge with a higher PHA content than conventional activated sludge. An operating period under full nitrification mode achieved successful removal efficiencies for total N, P and COD_T (86 ± 12%, 93 ± 9% and 79 ± 6%). In the following period, nitrite shortcut (with undetectable activity of nitrite oxidising bacteria) was achieved by implementing automatic control of the aerobic phase length in R2-AUT using ammonium measurement and operating at a lower sludge retention time. Similar N, P and COD_T removal efficiencies to the full nitrification period were obtained. P-recovery from the anaerobic supernatant of R1-HET was achieved in a separate precipitator by increasing pH and dosing MgCl₂, recovering an average value of 45% of the P in the influent as struvite precipitate, with a peak up to 63%. These values are much higher than the typical values of sidestream P-recovery (12%). Regarding PHA, a percentage in the biomass in the range 6.9–9.2% (gPHA·g⁻¹TSS) was obtained.

如今，废水处理系统正在演变为从废水中回收能源和资源的系统。这项工作展示了一个示范规模的中试工厂（7.8 m ³）的长期运行，该工厂的新型配置名为主流SCEPPHAR（短切增强型磷和聚羟基链烷酸酯（PHA）回收），并基于两个顺序分批反应器（R1-HET和R2-AUT）。这是首次演示并在相关操作条件下同时整合了快速硝化，P回收和PHA含量高于传统活性污泥的污泥生产的相关操作条件。下充分硝化模式的操作期间取得成功的去除效率为总N，P和COD _Ť（86±12％，93±9％和79±6％）。在接下来的时期，通过使用铵盐测量对R2-AUT中的好氧相长度进行自动控制并在较短的污泥保留时间下运行，实现了亚硝酸盐捷径（亚硝酸盐氧化细菌具有不可检测的活性）。获得了与整个硝化期相似的N，P和COD _T去除效率。从R1-HET厌氧上清液中P的回收是在单独的沉淀器中通过提高pH值和计量MgCl _{2来实现的}，回收的进水中P的平均值为鸟粪石沉淀，回收率达到平均值的45％，峰值可达63％。这些值远高于侧流P回收率的典型值（12％）。关于PHA，生物量中的百分比范围为6.9–9.2％（gPHA·g ^-1TSS）。