Abstract：
The aim of this study was to evaluate two moving bed biofilm reactors (MBBR) without nitrifying bacteria inoculation. Biofilms and viable bacterial colonies were evaluated after 124 days. MBBR bioreactors received water from Oreochromis niloticus fish farming and water quality parameters were monitored daily. Four distinct phases with different fish stocking density were established.: phase 1 (2.40 kg m-3), phase 2 (4.95 kg m-3), phase 3 (8.71 kg m-3) and phase 4 (12.23 kg m-3). The successful maturation of the bioreactors occurred around on the 100th experimental day when the nitration rate increased to 57 % in MBBR1 and 38 % in MBBR2. 105 species were identified in the biofilms, which were grouped into 65 genera, three of which were essential: Pseudomonas (21.7 %), Nitrospira (15.1 %) and Gemmobacter (11.2 %). MBBR start-up without bacterial inoculation is time-consuming, however, strengthened by important nitrifying groups.
摘要：
这项研究的目的是评估两个不接种硝化细菌的移动床生物膜反应器（MBBR）。124天后评价生物膜和活细菌菌落。MBBR生物反应器从尼罗罗非鱼鱼类养殖中接收水，并每天监测水质参数。建立了具有不同鱼类放养密度的四个不同阶段。：第1阶段（2.40kgm-3），阶段2（4.95kgm-3），第三阶段(8.71千克米-3)和第四阶段(12.23千克米-3)。生物反应器的成功成熟发生在第100个实验天左右，当时硝化率在MBBR1中增加到57％，在MBBR2中增加到38％。在生物膜中鉴定出105个物种，分为65属，其中三个是必需的：假单胞菌（21.7％），硝基螺旋体（15.1%）和Gemmobacter（11.2%）。MBBR在没有细菌接种的情况下启动是耗时的，然而,由重要的硝化基团加强。
