Wastewater phosphorus removal achieved biologically is associated with the process known as enhanced biological phosphorus removal (EBPR). In contrast with canonical EBPR operations that employ alternating anaerobic–aerobic conditions and achieve asynchronous carbon and phosphorus storage, research herein focused on phosphorus removal achieved under aerobic conditions synchronously with volatile fatty acid (VFA) storage as polyhydroxybutyrate-co-valerate (PHBV). 90.3 ± 3.4 % soluble phosphorus removal was achieved from dairy manure fermenter liquor; influent and effluent concentrations were 38.6 ± 9.5 and 3.7 ± 0.8 mgP/L, respectively. Concurrently, PHBV yield ranged from 0.17 to 0.64 mgCOD/mgCOD, yielding 147–535 mgCOD/L. No evidence of EBPR mechanisms was observed, nor were canonical phosphorus accumulating organisms present; additionally, the polyphosphate kinase gene was not present in the microbial biomass. Phosphorus removal was primarily associated with biomass growth and secondarily with biomass complexation. Results demonstrate that concurrent PHBV synthesis and phosphorus recovery can be achieved microbially under aerobic dynamic feeding conditions when fed nutrient rich wastewater.

中文翻译：

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在有氧条件下从发酵奶牛粪便中去除磷并同时合成聚羟基丁酸酯-戊酸酯


通过生物方法实现的废水除磷与强化生物除磷 (EBPR) 过程相关。与采用交替厌氧-好氧条件并实现异步碳磷储存的典型 EBPR 操作相比，本文的研究重点是在有氧条件下实现除磷，同时将挥发性脂肪酸 (VFA) 储存为聚羟基丁酸戊酸 (PHBV)。奶牛粪便发酵液的可溶性磷去除率达到 90.3 ± 3.4%；进水和出水浓度分别为 38.6 ± 9.5 和 3.7 ± 0.8 mgP/L。同时，PHBV 产量范围为 0.17 至 0.64 mgCOD/mgCOD，产量为 147-535 mgCOD/L。没有观察到 EBPR 机制的证据，也不存在典型的磷积累生物体；此外，微生物生物质中不存在多磷酸激酶基因。磷的去除主要与生物量生长有关，其次与生物量络合有关。结果表明，当供给营养丰富的废水时，在需氧动态供给条件下，可以通过微生物同时实现 PHBV 合成和磷回收。