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Partial Nitrification Algal-Bacterial Granule System Cultivation: Performance, Lipid Production and Biological Community
Water, Air, & Soil Pollution ( IF 3.8 ) Pub Date : 2020-05-08 , DOI: 10.1007/s11270-020-04626-7
Shaoxiong Zhang , Huanchen Huo , Fansheng Meng

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 RL was up to 772.5 ng/L, much higher than that (592.8 ng/L) in the effluent of control without light irradiation (RC), 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 RC, making the algal-bacterial granule a value-added biomass. The relative abundance of Nitrosomonadaceae (AOB) slightly decreased from 5.4% in RC to 3.8% in RL, while Nitrospiraceae (NOB) was completely inhibited in algal-bacterial granules.

中文翻译:

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。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。
更新日期:2020-05-08
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