燃料乙醇废水厌氧段处理工艺研究

发布时间：2018-01-01 02:03

本文关键词：燃料乙醇废水厌氧段处理工艺研究　出处：《西南交通大学》2015年硕士论文　论文类型：学位论文

更多相关文章： 燃料乙醇废水 厌氧处理器 EGSB UASB

【摘要】：燃料乙醇产业在我国属于新兴产业,其作为替代燃料的使用有着较为广阔的市场和前景。我国先后在河南、黑龙江等两省开展车用燃料乙醇汽油的试用推广。之后,我国又在吉林、辽宁、安徽三省开展车用燃料乙醇汽油的试用推广工作。经过多年的试点和推广使用,我国在车用燃料乙醇汽油的生产、混配、储运及销售等各个方面均拥有成熟可靠的技术。截至目前,我国建成投产的燃料乙醇企业的满负荷产能合计102万吨／年。按照混合汽油中燃料乙醇含量10%计算,我国已形成年混配1020万吨生物乙醇汽油的能力。但是在燃料乙醇的生产发酵过程中,会产生大量高浓度的有机废液,而国内尚无成熟可靠的针对燃料乙醇废水的工艺技术。本研究在阅读大量国内外相关文献资料的基础上详细论述了燃料乙醇废水处理技术的原理和工艺流程等,对四川地区和国内的燃料乙醇企业的废水处理工程进行了仔细的调查研究,并分析了各自的优劣。选取在燃料乙醇废水处理过程中对处理效率影响最大的厌氧工段进行研究,重点研究UASB厌氧处理工艺和EGSB厌氧处理工艺在不同条件下的处理效果。通过EGSB厌氧段启动运行实验和UASB厌氧段启动运行实验可知,两种厌氧反应器均能达到较好的处理效果。EGSB厌氧反应器出水中CODcr去除率可保持在88%以上,pH维持在7.4左右。当进入稳定运行期后,在进水负荷23kgCOD/m3.d的条件下,沼气产量可达到40L/d。与UASB反应器相比,EGSB反应器具有启动周期短、有机负荷提高速率快、处理效率高等特点。同时,EGSB反应器比UASB反应器具有更强的抵御进水pH值变化和温度变化的能力,CODcr去除率受到的影响更小,而且CODCr去除率受到影响之后恢复到原来的CODcr去除率耗时更短。因此,采用EGSB工艺作为燃料乙醇废水处理中的厌氧段工艺,其综合能力优于UASB工艺。若将EGSB厌氧反应器应用于燃料乙醇的污水处理中去,能达到很好的处理效果,是一种很具有吸引力的厌氧段处理技术,具有很大的推广价值和广阔的应用前景。
[Abstract]:Fuel ethanol industry is a new industry in China, and its use as a substitute fuel has a broad market and prospects. China has been in Henan Province. Heilongjiang Province and other two provinces to launch the trial and promotion of vehicle fuel ethanol gasoline. After years of pilot and promotion of the trial and use of vehicle fuel ethanol gasoline in three provinces of Jilin Liaoning and Anhui. China has a mature and reliable technology in the production, blending, storage, transportation and sales of automotive fuel ethanol gasoline. Up to now. The total full capacity of the fuel ethanol enterprises built and put into production in China is 1.02 million tons per year. The fuel ethanol content in the mixed gasoline is calculated as 10%. The capacity of blending 10.2 million tons of bioethanol gasoline per year has been formed in China, but in the process of production and fermentation of fuel ethanol, a large amount of high concentration organic waste liquor will be produced. However, there is no mature and reliable technology for fuel ethanol wastewater treatment in China. Based on reading a large number of domestic and foreign literature, the principle and process of fuel ethanol wastewater treatment are discussed in detail. The wastewater treatment projects of fuel ethanol enterprises in Sichuan and China were investigated and studied carefully. And analyzed their advantages and disadvantages. Selected in the fuel ethanol wastewater treatment process the largest impact on the efficiency of the anaerobic section for study. The effects of UASB anaerobic treatment and EGSB anaerobic treatment under different conditions were studied. The results were obtained from the start-up operation of EGSB anaerobic section and UASB anaerobic stage. The removal rate of CODcr in the effluent of EGSB-anaerobic reactor can be kept above 88% and pH 7.4.When the anaerobic reactor enters into a stable operation period. Under the condition of water loading of 23kg COD / m ~ (3. D), the biogas production can reach 40 L / d. Compared with the UASB reactor, the start-up period of the UASB reactor is shorter. At the same time, the UASB reactor has stronger ability to resist the change of pH and temperature than the UASB reactor. The CODcr removal rate is less affected, and the CODCr removal rate is affected and it takes less time to recover to the original CODcr removal rate. The EGSB process is used as the anaerobic process in the treatment of fuel ethanol wastewater, and its comprehensive capability is better than that of the UASB process. If the EGSB anaerobic reactor is applied to the wastewater treatment of fuel ethanol. It is an attractive anaerobic stage treatment technology, which has great value of popularization and broad application prospect.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X784

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