【摘要】：平整液廢水作為堿性含油廢水,一直是冶金行業(yè)較難處理的廢水之一。搭建了一套厭氧動(dòng)態(tài)膜生物反應(yīng)器(An DMBR),通過梯級(jí)馴化的方式,處理COD為2 500 mg·L~(-1)左右的平整液廢水。經(jīng)過88 d的啟動(dòng)馴化,在膜通量為6 L·(m2·h)-1,HRT為2.5 d的條件下,出水穩(wěn)定在500 mg·L~(-1)左右,甲烷產(chǎn)率約0.151 L·g-1,動(dòng)態(tài)膜的一個(gè)運(yùn)行周期可以分為成膜階段、穩(wěn)定階段和堵塞階段3個(gè)階段。成膜階段出水濁度隨動(dòng)態(tài)膜的逐漸形成而下降;而后動(dòng)態(tài)膜形成,出水濁度穩(wěn)定,為穩(wěn)定階段;最后為堵塞階段,跨膜壓差激增,出水濁度上升。同時(shí)對(duì)馴化及穩(wěn)定運(yùn)行階段的污泥進(jìn)行了微生物菌群分析,在細(xì)菌群落中主要的微生物菌群為Clostridia(梭狀芽胞桿菌綱)、Bacteroidia(擬桿菌綱)、Anaerolineae(厭氧繩菌綱)、OP8_1和Spirochaetes(螺旋體綱),其中擬桿菌綱是處理平整液廢水的優(yōu)勢(shì)細(xì)菌菌群。在古菌群落中,Methanolinea(甲烷繩菌屬)和Methanosaeta(甲烷鬃毛菌屬)為主要菌種,隨著反應(yīng)器的長期馴化和運(yùn)行,甲烷鬃毛菌逐漸成為反應(yīng)器中優(yōu)勢(shì)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.
【作者單位】： 同濟(jì)大學(xué)環(huán)境科學(xué)與工程學(xué)院污染控制與資源化研究國家重點(diǎn)實(shí)驗(yàn)室;
【分類號(hào)】：X757

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