固定化季铵盐对硫酸盐有机废水厌氧处理颗粒污泥特性的影响

将硫酸盐有机废水厌氧处理过程中活性受抑制的厌氧颗粒污泥接入2台平行运行的升流式厌氧污泥床（UASB，1#、2#）反应器，并分别向其中投加短链和长链固定化季铵盐（IQAS），考察IQAS的投加对颗粒污泥生物活性和理化特性的影响.结果表明：投加IQAS后，2台反应器中颗粒污泥的脱氢酶活性和比产甲烷活性均明显提高，沉降性能提升，其总硫、金属元素、胞外蛋白质（PN）及胞外多糖（PS）含量均呈降低趋势，表面的PN、PS拉曼光谱峰值减弱；与1#反应器相比较，2#反应器中颗粒污泥的辅酶F₄₂₀浓度增加明显，总硫和Fe元素含量减少显著；由此表明，IQAS的投加能剥离颗粒污泥表面沉积物，使活性受抑制的厌氧颗粒污泥的生物活性提高，其中长链IQAS对颗粒污泥的剥离激活作用较明显.

Effect of immobilized quaternary ammonium salt on properties of anaerobic granular sludge for treating sulfate organic wastewater

The inhibited anaerobic granules in the process of the anaerobic treatment of sulfate organic wastewater was inoculated into two parallel-operated up-flow anaerobic sludge blankets (UASB) reactors (1# and 2#), then the short-chain and long-chain immobilized quaternary ammonium salt (IQAS) were added into the UASB reactors 1# and 2#, respectively. The effects of the IQAS on the biological activities and physicochemical properties of anaerobic granules were investigated. The results showed that the dehydrogenase and the methanogenic activity of the granules in the two reactors were enhanced with the addition of IQAS, otherwise the settleability was improved. However, the contents of total sulfur, metal elements, extracellular proteins (PN) and extracellular polysaccharides (PS) of the granules were decreased. Furthermore, raman spectroscopy analysis showed that the peak values of PN and PS on the surface of the granules decreased with IQAS addition. Compare with reactor 1#, the coenzyme F₄₂₀ concentration of anaerobic granules increased obviously in the reactor 2#, but total sulfur and iron contents decreased significantly. This indicated that the IQAS could enhance the bioactivity of the inhibited anaerobic granules due to the stripping surface precipitates from the anaerobic granules, especially the long chain IQAS stripping and activation was more obvious.