【摘要】：高鹽廢水通常含有高COD濃度,難以處理,引用具有耐鹽性能的生物反應(yīng)器處理高鹽廢水成為必要.使用模擬高鹽廢水在3.267 kg·(m~3·d)~(-1)的COD容積負(fù)荷下,將Cl~-濃度逐步從0提升至10 000 mg·L~(-1),研究鹽度對(duì)膨脹顆粒污泥床(expanded granular sludge bed,EGSB)反應(yīng)器的影響.結(jié)果表明,Cl~-濃度小于7 500 mg·L~(-1)時(shí),對(duì)微生物的抑制作用較低;Cl~-濃度為7 500 mg·L~(-1)時(shí),反應(yīng)器的COD去除率能保持在98.1%左右,容積產(chǎn)氣率能夠基本保持在1.3 m~3·(m~3·d)~(-1)以上,大粒徑的厭氧顆粒污泥仍然占據(jù)體系的主體;當(dāng)Cl~-濃度為10 000 mg·L~(-1)時(shí),反應(yīng)器中的厭氧顆粒污泥受到嚴(yán)重影響.采用高通量測(cè)序技術(shù)對(duì)0和5 000 mg·L~(-1)兩個(gè)Cl~-濃度下的厭氧顆粒污泥的微生物菌群結(jié)構(gòu)進(jìn)行分析,結(jié)果表明,鹽度影響了微生物的種群分布,在5 000 mg·L~(-1)的Cl~-濃度下,主要的優(yōu)勢(shì)菌屬由Cl~-濃度為0時(shí)的Methanoregula與Longilinea變?yōu)镸ethanobacterium、Methanospirillum、Methanothrix和Paludibacter.
[Abstract]:High salt wastewater usually contains high concentration of COD, so it is necessary to treat high salt wastewater with salt tolerant bioreactor. Using simulated high-salt wastewater at 3.267 kg (M3 d) ~ (-1) COD volumetric loading, the concentration of Cl~- was gradually raised from 0 to 10 000 mg L-1. The effect of salinity on (expanded granular sludge bed, of bulking granular sludge bed was studied. Effect of EGSB) reactor. The results showed that when the concentration of Cl~- was less than 7 500 mg L ~ (-1), the inhibition of microorganism was low. When the concentration of Cl~- is 7 500 mg L ~ (-1), the removal rate of COD can be maintained at 98.1%, and the volumetric gas yield can be kept above 1.3 mm3 (m ~ (3 d) ~ (-1). The large size of anaerobic granular sludge still occupied the main part of the system. When the concentration of Cl~- was 10 000 mg L ~ (-1), the anaerobic granular sludge in the reactor was seriously affected. The microbial community structure of anaerobic granular sludge at 0 and 5 000 mg L ~ (-1) Cl~- concentrations was analyzed by high-throughput sequencing technique. The results showed that salinity affected the distribution of microbial population. At the concentration of 5 000 mg L ~ (-1) Cl~-, the dominant bacteria changed from Methanoregula and Longilinea to Methanobacterium,Methanospirillum,Methanothrix and Paludibacter. when Cl~- concentration was 0.
【作者單位】： 四川大學(xué)建筑與環(huán)境學(xué)院;
【基金】：四川省科技廳科技支撐計(jì)劃項(xiàng)目(2015SZ0009)
【分類號(hào)】：X703.1

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本文編號(hào)：2334496