【作者】 李军媛；

【导师】 陈花果；

【作者基本信息】 长安大学 ， 环境工程， 2008， 硕士

【摘要】 水环境中氮元素的大量积累导致了水环境质量的严重恶化,垃圾渗滤液、消化污泥脱水液等低(超低)C/N高氨废水占氨氮排放总量的50%以上;对于传统的生物硝化—反硝化处理工艺来说,当C/N<2.5时,如无外加有机碳源,反硝化无法有效地进行,传统的生物脱氮工艺己不能满足这些高氨低碳废水的处理要求。如何实现低C/N高氨废水高效、低耗处理一直是污水处理领域的难题,本课题立足于国内外处理高氨低碳废水相关工艺的最新科研成果,以短程硝化—厌氧氨氧化耦合工艺实现低C/N废水的处理。该耦合工艺的短程硝化系统采用SBR作为反应器,以经恢复后的亚硝化活性污泥作为短程硝化系统的接种污泥,在启动及优化试验中,研究了匹配厌氧氨氧化条件的短程硝化系统的不同反应参数;厌氧氨氧化工艺采用UASB作为反应器,以厌氧反硝化污泥作为接种污泥,进行启动运行试验,并最终使短程硝化-厌氧氨氧化耦合实现低C/N高氨废水的有效处理。试验结果表明:短程硝化反应控制DO为0.8～0.9mg/L、pH为7.0～7.5、COD约200 mg/L、碱度/NH4+-N约为1左右时,可以将出水水质中NO2--N/NH4+-N控制在合适的比例范围内,能较好的实现与厌氧氨氧化相匹配的短程硝化工艺。基于试验数据本文推导了NO2--N有效积累的数学模型,确定出水中NO2--N/NH4+-N的比例与进、出水的函数关系。厌氧氨氧化系统温度为35±1℃、pH为7.0～7.5、无需投加碳源时,ANAMMOX反应可以将80%以上的NH4+-N和NO2--N转化为N2。耦合工艺稳定运行180天的结果显示,厌氧氨氧化反应器可以很好的适应短程硝化的出水,处理后出水TN的去除率平均为70.8%,并基于试验数据确定ANAMMOX反应的动力学参数,得到以NH4+-N和NO2--N为基质的数学模型。本实验的研究成果以期为实现新型生物脱氮技术的应用及工程化提供基础技术参数。更多还原

【Abstract】 The significant accumulation of nitrogen in the water environment had casued the serious deterioration of water environmental quality. The emissions of low or lower C / N and the high ammonia wastewater, such as leachate, sludge dewatering digestiona and so on, took up the total ammonia emissions more than 50 percent. For the traditional biological denitrification - denitrification process, when C / N <2.5, and if no additional organic carbon, the denitrification would not be carried out effectively. The traditional biological denitrification - denitrification process has been unable to meet the requirements of treatment the high-ammonia and low-carbon wastewater.How to achieve the treatment of high-ammonia and low-carbon wastewater with high efficient and low power consumption is a diffcult problem in the field of sewage treatment. The issues based on the latest scientific research findings of domestic and abroad about high-ammonia and low-carbon wastewater, and used the SHARON-ANAMMOX coupling technology to carry out the treatment of low C/N wastewater. In the coupling technology, SBR was adopted as the reactor of SHARON, and nitritational activated sludge was used as the vaccination sludge, and achieced half- nitrosation successfully. In the experiment of start and optimization, the different reaction parameters of SHARON, which matched with ANAMMOX, was studied. The ANAMMOX in the conditions of UASB as the reactor and anaerobic digestion sludge as the vaccination sludge, carried out the starting test, and joined up SHARON-ANAMMOX to achieve the treatment of low C / N wastewater.The results of experiment showed that in the conditions of DO=0.8-0.9 mg / L, pH=7.0-7.5, COD≈200 mg/L and alkalinity/NH4+-N≈1, the ratio of NO2--N/NH4+-N of effluent can be controlled in the appropriate range, and can match better with ANAMMOX. Based on the test datas, the paper derived from the mathematical model of the effective accumulation of nitritation, and determined the function of the ration of NO2--N/NH4+-N in effluent and the influent and effluent. In the conditions of T=35±1℃, pH=7.0-7.5, and without addition carbon, ANAMMOX can make more than 80 per cent of NH4+-N and NO2--N into N2. The results of the coupling technology,which operated 180-day stably,showed that the ANAMMOX reactor can adapt the effluents of SHARON very well, and the TN removal rate can up to 70.8 percent averaged. Based on the test datas, and used Haldam model, attained the kinetic parameters of ANAMMOX.The research results of the experiment expected to privode basic technology parameters for the engineering of novel biological nitrogen removal technology.更多还原