Development of Biorector for Treatment of High Concentration Ammonium Wastewater with Immobilized Bacteria

在1L鼓泡槽中进行了含高浓度氨氮模拟废水的硝化试验，固定化细菌的质量分数为5wt%，硝化时间为124~212天。从活性污泥(AS)或有效微生物群(EM)中培养出能耐受高达5300 NH4-nMG/L或以上高浓度硫酸铵的驯化硝化细菌，并将其物理固定在含有活性碳(C)的聚合物球形水凝胶(KU)或粒状聚丙烯(BCP[C])上。在聚乙烯醇(PVA)与硼离子(AS或EM)/(PVA、PVA[C]、PVA[F]或PVA[Al])的交联凝胶中，分别在没有或含有C、飞灰(F)或活性氧化铝(Al)的情况下对As或EM进行了包埋；与物理吸附的细菌相比，包裹的细菌完成驯化培养所需的时间更短。含有无机填料的载体中的细菌比…更快地完成驯化。不加填料：EM/PVA[F](细菌/载体)在高NH_4~+介质中驯化124天。为了使细菌与载体大量结合，将驯化后的硝化细菌物理固定在聚合物球形水凝胶(AL，AL[C]，AL[F])、聚合物立方体水凝胶(ALCU，ALCU[C])或圆柱形聚丙烯(ALT，ALT[C])上，用驯化的硝化细菌去除高浓度氨氮，并从模型废水中剥离。有趣的是，固定化细菌从NH_4~+串联产生NO_3^-，而AS/PVA和物理固定化细菌只产生NO_2^-。在氨氮负荷较高的情况下，EM/PVA[C]或AS/ALT[C]培养的驯化细菌可在30d内反萃去除5300NH_4-NMG/L模型废水中约57%的铵离子。利用AS/ALT[C]为NO2产生菌和EM/PVA[Al]为NO3产生菌的固定化细菌进行了完全硝化反应。高浓度NH_4~+几乎被硝化成NO_2~-。或NO_3^-分别在35天和50天后。较少

Experiments of nitrification for model wastewater containing high concentration ammonium were carried out in a 1L bubbling vessel with 5 wt% of immobilized bacteria during a period of 124-212 days. Acclimated nitrifying bacteria to tolerate a high concentration of ammonium sulfate as high as 5, 300 NH_4-Nmg/L or above were cultivated from activated sludge (AS) or Effective Micro organism groups (EM), and were physically immobilized on polymeric spherical hydrogel (KU), or pelletized polypropylene (BCP[C]) contains activated carbons (C). The AS or EM were also entrapped without or with C, fly ash (F), or activated alumina (Al) in the crosslinking gelation of poly (vinyl alcohol) (PVA) with boric ion: (AS or EM) / (PVA, PVA[C], PVA[F], or PVA[Al]); respectively. The entrapped bacteria finished the acclimated cultivation during shorter terms than physically adsorbed bacteria. The entrapped bacteria in the support containing inorganic fillers were finished acclimation more rapidly than tho … More se without fillers: the acclimation of EM/PVA[F] (bacteria/support) cultured in the high NH_4^+ medium was completed for 124 days.In order to make a lot of combination between bacteria and supports, acclimated nitrifying bacteria was physically immobilized on polymeric spherical hydrogel (AL, AL[C], AL[F]), polymeric cubic hydrogel (ALCu, ALCu[C]), or cylindrical polypropylene (ALT, ALT[C]), too.Removal of high concentration of ammonium with acclimated nitrifying bacteria and stripping from model wastewater were carried out. Interestingly, entrapped bacteria produced NO_3^-from NH_4^+ in series, while AS/PVA and physically immobilized bacteria produced : only NO_2^- from NH_4^+. In the case of high concentration of ammonium load, the acclimated bacteria cultured from EM/PVA[C], or AS/ALT[C] were able to remove about 57% of the ammonium ions with stripping from the 5, 300 NH_4-Nmg/L model wastewater by 30 days. Complete nitrification reactions were examined by using of immobilized bacteria with AS/ALT[C] that was NO_2^- productive and EM/PVA[Al] that was NO_3^- productive. High concentration of NH_4^+ was almost nitrified to NO_2^-. or NO_3^- after 35 or 50 days, respectively. Less