In this study, partial nitrification algal-bacterial granular sludge system was cultivated when treating ammonium-rich wastewater. With 200 mg/L influent NH₄-N concentration, the effluent NH₄-N, NO₂-N and NO₃-N concentrations were maintained at 62.3 mg/L, 67.1 mg/L, and 7.8 mg/L, making it as an ideal influent for anaerobic ammonia oxidation (Anammox). The combined stress of algae growth and free nitrous acid (FNA) should be responsible for partial nitrification in algal-bacterial granular sludge system. The concentration of N-acyl-homoserine lactones (AHLs, quorum sensing molecule) in the effluent of R_L was up to 772.5 ng/L, much higher than that (592.8 ng/L) in the effluent of control without light irradiation (R_C), leading to enhanced EPS production and granulation in the partial nitrification algal-bacterial granular sludge system. Because of the growth of algae (Chlorella, Scenedesmus, and Navicula), the lipid content in the algal-bacterial granules was 57.4 mg/g-SS, which was about 1.7 times higher than that in the granules from R_C, making the algal-bacterial granule a value-added biomass. The relative abundance of Nitrosomonadaceae (AOB) slightly decreased from 5.4% in R_C to 3.8% in R_L, while Nitrospiraceae (NOB) was completely inhibited in algal-bacterial granules.

中文翻译：

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部分硝化藻类细菌颗粒系统的培养：性能，脂质生产和生物群落

在这项研究中，当处理富铵废水时，建立了部分硝化藻类-细菌颗粒污泥系统。在进水NH ₄ -N浓度为200 mg / L时，出水NH ₄ -N，NO ₂ -N和NO ₃ -N浓度分别保持在62.3 mg / L，67.1 mg / L和7.8 mg / L，使其成为作为厌氧氨氧化（Anammox）的理想进水。藻类细菌和污泥系统中藻类生长和游离亚硝酸（FNA）的共同作用应引起部分硝化。R _L废水中N-酰基高丝氨酸内酯（AHLs，群体感应分子）的浓度其最高浓度为772.5 ng / L，远高于无光辐照（R _C）的对照废水（592.8 ng / L ），从而导致了部分硝化藻类-细菌颗粒污泥系统中EPS的产生和颗粒化。因为藻类（生长的小球藻，栅藻和舟形），在藻类细菌颗粒的脂质含量为57.4毫克/克-SS，这是关于从R中的颗粒的1.7倍高于_Ç，使得藻类-细菌颗粒一种增值的生物质。亚硝菌科的相对丰度从R _C的5.4％略降至R _L的3.8％，而硝化螺菌科 （NOB）在藻类细菌颗粒中被完全抑制。