厌氧动态膜生物反应器处理冷轧平整液废水
发布时间：2018-11-22 07:18
【摘要】：平整液废水作为碱性含油废水,一直是冶金行业较难处理的废水之一。搭建了一套厌氧动态膜生物反应器(An DMBR),通过梯级驯化的方式,处理COD为2 500 mg·L~(-1)左右的平整液废水。经过88 d的启动驯化,在膜通量为6 L·(m2·h)-1,HRT为2.5 d的条件下,出水稳定在500 mg·L~(-1)左右,甲烷产率约0.151 L·g-1,动态膜的一个运行周期可以分为成膜阶段、稳定阶段和堵塞阶段3个阶段。成膜阶段出水浊度随动态膜的逐渐形成而下降;而后动态膜形成,出水浊度稳定,为稳定阶段;最后为堵塞阶段,跨膜压差激增,出水浊度上升。同时对驯化及稳定运行阶段的污泥进行了微生物菌群分析,在细菌群落中主要的微生物菌群为Clostridia(梭状芽胞杆菌纲)、Bacteroidia(拟杆菌纲)、Anaerolineae(厌氧绳菌纲)、OP8_1和Spirochaetes(螺旋体纲),其中拟杆菌纲是处理平整液废水的优势细菌菌群。在古菌群落中,Methanolinea(甲烷绳菌属)和Methanosaeta(甲烷鬃毛菌属)为主要菌种,随着反应器的长期驯化和运行,甲烷鬃毛菌逐渐成为反应器中优势菌群。
[Abstract]:As alkaline oily wastewater, leveling liquid wastewater has been one of the difficult wastewater in metallurgical industry. A set of anaerobic dynamic membrane bioreactor (An DMBR),) was set up to treat levelling liquid wastewater with COD of 2 500 mg L ~ (-1). Under the condition of membrane flux of 6 L (m 2 h) -1 and HRT of 2 5 d, the effluent was stable at 500 mg L ~ (-1) and methane yield was about 0.151 L g ~ (-1). A running period of dynamic membrane can be divided into three stages: film forming stage, stable phase and clogging stage. The turbidity of effluent decreases with the formation of dynamic membrane, then the turbidity of effluent is stable, and the turbidity of effluent is stable. Finally, in the stage of blockage, the pressure difference of transmembrane increases rapidly, and the turbidity of effluent increases. At the same time, the microbial flora of sludge in the stage of acclimation and stable operation was analyzed. The main microflora in the bacterial community was Clostridia (), Bacteroidia (), Anaerolineae (). OP8_1 and Spirochaetes (Spirulina), in which Bacteroides are the dominant bacterial flora in the treatment of levelling liquid wastewater. In the ancient community, Methanolinea (and Methanosaeta were the main species. With the long-term acclimation and operation of the reactor, the methane-mane bacteria gradually became the dominant flora in the reactor.
【作者单位】： 同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室;
【分类号】：X757
本文编号：2348477
[Abstract]:As alkaline oily wastewater, leveling liquid wastewater has been one of the difficult wastewater in metallurgical industry. A set of anaerobic dynamic membrane bioreactor (An DMBR),) was set up to treat levelling liquid wastewater with COD of 2 500 mg L ~ (-1). Under the condition of membrane flux of 6 L (m 2 h) -1 and HRT of 2 5 d, the effluent was stable at 500 mg L ~ (-1) and methane yield was about 0.151 L g ~ (-1). A running period of dynamic membrane can be divided into three stages: film forming stage, stable phase and clogging stage. The turbidity of effluent decreases with the formation of dynamic membrane, then the turbidity of effluent is stable, and the turbidity of effluent is stable. Finally, in the stage of blockage, the pressure difference of transmembrane increases rapidly, and the turbidity of effluent increases. At the same time, the microbial flora of sludge in the stage of acclimation and stable operation was analyzed. The main microflora in the bacterial community was Clostridia (), Bacteroidia (), Anaerolineae (). OP8_1 and Spirochaetes (Spirulina), in which Bacteroides are the dominant bacterial flora in the treatment of levelling liquid wastewater. In the ancient community, Methanolinea (and Methanosaeta were the main species. With the long-term acclimation and operation of the reactor, the methane-mane bacteria gradually became the dominant flora in the reactor.
【作者单位】： 同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室;
【分类号】：X757
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