Application of aerobic granules-continuous flow reactor for saline wastewater treatment: Granular stability, lipid production and symbiotic relationship between bacteria and algae
Application of aerobic granules-continuous flow reactor for saline wastewater treatment: Granular stability, lipid production and symbiotic relationship between bacteria and algae
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好氧颗粒-连续流反应器在含盐废水处理中的应用：颗粒稳定性、脂质产生以及菌藻共生关系
DOI：
10.1016/j.biortech.2019.122291
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发表时间：
2019
影响因子：
11.4
通讯作者：
Zhenya Zhang
中科院分区：
文献类型：
--
作者：
Fansheng Meng;Weiwei Huang;Dongfang Liu;Yingxin Zhao;Wenli Huang;Zhongfang Lei;Zhenya Zhang
采用连续流反应器（CFR）研究了细菌好氧颗粒污泥（AGS-CFR）和藻菌颗粒污泥（ABGS-CFR）处理含盐量为1-4%的含盐废水的可行性。高盐度被认为是促进藻类生长的ABGS-CFR，表现出略高的总氮和磷的去除效率在1-3%的盐度。ABGS-CFR在1-4%的盐度下保持了良好的颗粒稳定性，而AGS-CFR在4%的盐度下逐渐崩解，胞外聚合物中藻酸盐样胞外多糖的积累减少了39.3%。吲哚乙酸（IAA）和超氧化物歧化酶（SOD）分析表明，ABGS-CFR中的细菌和藻类（菱形藻）在高盐条件下形成了良好的共生关系，实现了藻类的快速生长和2倍的油脂产量。高盐度有利于盐单胞菌和亚硝化菌的富集，不利于亚硝化菌和黄杆菌的富集。本研究结果可为ABGS-CFR的实际应用提供有益的信息。
In this study a continuous flow reactor (CFR) was employed to compare the feasibility of bacterial aerobic granular sludge (AGS-CFR) and algal-bacterial granular sludge (ABGS-CFR) for treating 1–4% saline wastewater. High salinity was found to enhance algae growth in ABGS-CFR, which exhibited slightly higher total nitrogen and phosphorus removal efficiencies at 1–3% salinity. ABGS-CFR maintained good granular stability at 1–4% salinity, while AGS-CFR gradually disintegrated at 4% salinity with 39.3% less accumulation of alginate-like exopolysaccharides in the extracellular polymeric substances. Indole-3-acetic acid (IAA) and superoxide dismutase (SOD) analysis suggested that bacteria and algae (Nitzschia) in ABGS-CFR formed a good symbiotic relationship under high salinity conditions, achieving rapid algae growth and 2 times lipid production. High salinity was conducive to enrichingHalomonasandNitzschiabut unfavorable forNitrosomonasandFlavobacterium. Results from this study could provide useful information on interactions between bacteria and algae in ABGS-CFR for its future practical application.