【作者】 张雷；

【导师】 欧阳峰；

【作者基本信息】 西南交通大学 ， 环境工程， 2007， 硕士

【摘要】 天然气净化废水包括正常生产废水和检修废水，正常生产废水有机物浓度低，较易处理；检修废水中含有大量难降解有机物，各种有机污染指标较高，不易处理。废水厌氧处理技术在高浓度有机废水的处理中有着广泛的应用，尤其是UASB工艺，不仅在易降解高浓度有机废水中有着广泛的应用，在高浓度难降解有机废水的处理中也得到了推广和应用。本文就中温条件下UASB反应器处理天然气净化厂检修废水的启动过程进行了研究。UASB反应器启动试验以引进分厂酸化池污泥和其它工业UASB反应器污泥做为接种污泥，利用引进分厂检修废水做为原水，根据试验需要配水后进水。由于检修废水有足够的缓冲能力和氮营养物质，不增加碱度和氮营养物质。可是检修废水缺乏磷营养物质，为了满足微生物生长的需要、加速反应器的启动过程，人工添加了磷营养物质及微量元素。反应温度由室温升高到36℃，为防止温度变化过快对反应器产生不良影响，每天升高2℃。反应器进水COD浓度由1000mg／L逐渐升高，在遇到不良反应情况下适当降低进水COD浓度，最终进水COD为6000mg／L。虽然进水pH波动较大，但是出水pH稳定，说明该厌氧处理系统对酸碱有较强的缓冲能力。在试验过程中加强了对出水挥发性脂肪酸的监测，有效防止了反应器出现酸化的趋势。经133天的启动后，试验型UASB反应器进入稳定运行状态，COD去除率稳定在40％左右。更多还原

【Abstract】 The Wastewater from natural gas purification is comprised of normal purifying Wastewater, and examining and repairing Wastewater. The concentration of organics in normal purifying Wastewater is low and this Wastewater is easy to dispose; while the concentration of organics in examining and repairing Wastewater is high, which is hard to deal with. Anaerobic technologies are broadly used in dealing with high organic concentration Wastewater. As successful one of anaerobic technologies, up-flow anaerobic sludge blanket (UASB) is used not just in easily degraded high organic concentration Wastewater but also in hardly degraded high organic concentration Wastewater. The star-up of UASB reactors dealing with examining and repairing Wastewater is studied in the paper. The reactors are run on the condition of mesophilic anaerobic digestion.Two pilot-scale UASB reactors are seeded with sludge from acidification pond and other UASB reactors. The influent is mixed with examining and repairing Wastewater and fresh water, and is mixed with the demand of experimentation. The examining and repairing Wastewater is from Yinjin Department. As the examining and repairing Wastewater is abundant in nitrogen and alkalinity, there is no addition of them. While, there is a lack of phosphorus in the examining and repairing Wastewater. To meet the demand of bacteria and accelerate the speed of startup, phosphate fertilizer and microelements are added. The temperature of two pilot-scale reactors is increased from room temperature to 36℃, and 2℃is increased every day to prevent the bad reaction of quick temperature advance. The concentration of COD in influent is increased from 1000mg/L to 6000mg/L. When bad reaction appears, the concentration of COD in influent is reduced to the instance. The pH of effluent is steady which indicates the digestion system gets a good counteract on acid and alkali. To avoid the accumulation of VFA and acidification of reactor system, the concentration of VFA in effluent is analyzed. The star-up of pilot-scale UASB reactors continues 133d and then get into steady state. The COD removal is about 40%.更多还原