【作者】 丁玉；

【导师】 何争光；

【作者基本信息】 郑州大学 ， 市政工程， 2010， 硕士

【摘要】 本试验研究旨在探索旋流内循环厌氧反应器(EIC)处理酒精废水的可行性及工艺。旋流内循环厌氧反应器是在传统IC反应器的基础上,增设旋流布水装置,改善了物料在反应器内的混合流态,是一种新型高效的厌氧反应器。本研究采用自制的EIC反应器,在试验室条件下历时6个月,研究了EIC反应器处理酒精废水的启动过程、水力特性和颗粒污泥的特性。研究表明：采用EIC反应器处理酒精废水具有启动周期短、处理效率高、运行稳定等优点,为酒精废水的治理提供了新的途径。本文的主要内容和结果如下：(1)在EIC反应器的启动研究中,采用城市污水厂的厌氧消化污泥作为接种污泥,以低浓度、低流量的方式逐步提高进水COD浓度和容积负荷。以2kgCOD/(m3-d)的容积负荷驯化污泥,整个驯化过程历时50天,种泥由松散的絮状转变为具有一定产甲烷活性的颗粒污泥。污泥驯化结束后进入反应器的启动阶段,启动周期为40天,反应器的容积负荷可以达到12kgCOD/(m3-d), COD去除率稳定在83%,产气率达到0.3251/(l·d),连续内循环现象的出现,标志着EIC反应器的启动完成。(2)在EIC反应器的水力特性研究中,考察了反应器抗水力冲击负荷的性能、HRT对出水水质的影响、稳定运行阶段酸度的变化,并对反应器的水力学特性进行了简单分析。试验表明：在进水浓度波动较小的情况下,EIC反应器能承受的容积负荷为20kgCOD/(m3·d),最佳水力停留时间为6.6h,COD去除率能达到82%。(3)反应器稳定运行阶段,厌氧颗粒污泥颗粒化状态和沉降性能良好,颜色以灰黑色为主,结构密实,具有较高的产甲烷活性。颗粒污泥的最大沉降速度可达140m/h, VSS/TSS由接种时的0.60提高到0.88,最大比产甲烷活性可达1.036gCODCH4/g(VSS·d)。扫描电镜观察结果显示,颗粒污泥以产甲烷八叠球菌、短杆菌和产甲烷丝状菌为主,表面被大量的丝状菌覆盖,以产甲烷丝状菌为优势菌群。更多还原

【Abstract】 The paper studied on the feasibility and the function of alcohol wastewater treatment with the eddy internal circulation anaerobic reactor (EIC).The eddy internal circulation anaerobic reactor added the eddy distributor to the internal circulation anaerobic reactor which could improve the mixing pattern of solid particles in the reactor. Because of that the reactor possessed new style and high efficiency.The study on the self-manufacturable EIC dispose of the alcohol wastewater lasted for six months. The experiment researched on the process of startup, hydraulic characteristics and the characteristics of granular sludge. The study showed that the technology was in possession of the prominent virtues, such as short startup period, high treatment efficiency, running steadily and so on. So it can provide a new thought for alcohol wastewater treatment. The main contents and results of the experiment were as follow:(1)During the process of start-up, the anaerobic digested sludge was used as seed, the COD concentration and volumetric loading were increased by way of low concentration and low flow. The sludge domestication started at the volumetric loading rate 2kgCOD/m3·d, the periode could last for 40 days. Then the incompact seed sludge flocs were changed into granular sludge with the good capability of the sedimentation. The periodic of startup were 40 days. The system can show it was better effect when the volumetric loading rate reached 12kgCOD/m3·d, the COD removal rate leveled off 83%, and the aerogenic rate was 0.3251/(l·d).The appearance of the continuous internal circulation indicated the accomplishment of the start-up.(2)Study on wastewater treatment of hydraulic characteristics. Researched the impactive influence of the hydraulic loading, the affect of the effluent quality with the change of the HRT,and the variety of the acidity. The hydraulic characteristics were analyzed simply as well. The result could reveal that the volumetric loading rate reached to 20kgCOD/m3·d, the optimal HRT was 6.6h, the COD removal rate leveled off 82%, when the influent concentration maintained stably.(3)During the reactor running steadily, the diameter of the granular sludge was increased and the capability of the sedimentation was good. Its color was ashy-black mostly.Its structure was close-grained. The granular sludge owned high methanogenic activity. The maximal sedimentation rate was 140m/h. VSS/TSS reached to 0.88 from 0.60.The maximal aerogenic activity was 1.036gCODCH4/g(VSS·d). Through microscope, the granular sludge was composed of ball bacterium, bacillus and filamentous bacteria mainly. The surface of the sludge was covered by filamentous bacteria, and its dominant bacteria were methanathrix.更多还原