论文标题:螺旋升流式反应器在低温、长泥龄时处理城市污水的试验研究
Study on the Effect of Lower Temperature and Longer Sludge Age on Municipal Wastewater in SUFR System
论文作者 季铁军
论文导师 罗固源,论文学位 硕士,论文专业 环境工程
论文单位 重庆大学,点击次数 253,论文页数 104页File Size1442k
2004-10-20论文网 http://www.lw23.com/lunwen_369592/ 螺旋升流式反应器;脱氮除磷;低温影响;较长泥龄;活塞流
Spiral Up-Flow Reactor; biological nitrogen and phosphorus removal; Low temperature effect; longer sludge age; Plug flow
螺旋升流反应器（Spiral Up-Flow Reactor, SUFR）是一种具有机械导流系统的新型污水处理立式反应技术，该反应器的螺旋升流方式能提高基质的浓度梯度，延长基质在反应器中的停留时间，使反应器表现出明显的活塞流特征。作者在全面评述脱氮除磷理论和技术的基础上，结合螺旋升流式反应器（Spiral Up-Flow Reactor，SUFR）技术的特点，分析了SUFR系统在低温（8～20℃）运行时的处理效果；并通过不同泥龄的对比试验探索了常温时SUFR系统在较长泥龄条件下的工艺运行特点。试验主要在以下几个方面展开：研究低温对具有螺旋升流式反应器脱氮除磷的影响；建立温度影响的数学模型；研究低温对螺旋升流式反应器污泥特性的影响；研究较长泥龄时螺旋升流式反应器脱氮除磷的变化；对较长泥龄时螺旋升流式反应器系统的污泥特性进行分析。通过以上试验内容研究发现，低温运行期间COD、TN的处理效果虽然有所下降但是出水COD和TN仍分别小于40mg/L﹑10mg/L；而总磷的去除效果基本不受影响；低温对污泥的特性的负作用引起了污泥膨胀，但是依靠反应器技术自身的特点可以在较短的时间内自行得到恢复。SUFR系统在较长泥龄时（主要在32天左右）出水处理出水指标达到污水综合排放标准(GB8978-1996)的一级标准。试验表明SUFR系统（θc=32d）TN的处理效果明显高于SUFR系统（θc=20d）；SUFR系统（θc=32d）总磷的去除效果虽然低于SUFR系统（θc=20d），但是出水TP一直稳定在0.5 mg/L内；SUFR系统（θc=32d）的SVI值稳定在130以内，其SOUR值为10~18 mgDO/(gVSS·h)之间，低于SUFR系统（θc=20d）；SUFR系统（θc=32d）中的微生物生态丰富，食物链更加完善。本研究是国家“十五”科技攻关项目2001BA604A01子专题“简易高效活性污泥复合系统除磷脱氮技术研究与示范”的部分内容。本论文的研究内容可以为螺旋升流式反应器的工程应用提供依据。
The spiral up-flow reactor（SUFR） is a new stand pattern reaction technique of waste water treatment which has a mechanical leading flow system. The characteristic of spiral up-flow was favorable to enhance gradient distributing of the substrate, prolong the retention time of the substrate in the reactor, and made the SUFR be similar to plug-flow reactor and could increase the capacity utilization of the reactor. According to the characteristic of SUFR system, the operating result of temperature between 8℃ and 20℃ on biological nutrient removal was analysed on the base of reviewing the theory and technology on N and P removal. And the peculiarities of the SUFR system with the longer sludge age were analysed through test comparison .The followings were studied: 1) Studying on the effect of low temperature on nitrigen and phorsphours removal; 2)kinetic model of the biological nitrogen removal and biological phosphorus removal process coupled with the different temperature; 3) Studying on the effect of low temperature on the character of active sludge in the SUFR system; 4) Studying on the effect of longer sludge age on nitrigen and phorsphours removal; 5) Studying on the effect of longer sludge age on the character of active sludge in the SUFR system.According to the above study result, The operating result of temperature between 8℃ and 20℃ on biological nutrient removal in SUFR system indicated that the effluent COD was less than 40 mg/L and the effluent TN was less than 10 mg/L, although the decrease of removal of COD and TN coupled with low temperature was observed. The drop in temperature had no significant impact on phosphors removal. Low temperature did harm to the characteristics of the sludge and caused sludge to bulk. The sludge relying on the characteristic of Spiral up-flow reactor system，however ,was activated and resumed rapidly. The effluent quality of SUFR system with the longer sludge age was up to with the first class of discharge standard of pollutants for municipal wastewater treatment plant (GB8978-1996). The higher efficiency of TN removal in the SUFR system（θc=32d） was observed. The removal of TP in the SUFR system（θc=32d） was less than 0.5 mg/L, although the decrease of removal of TP coupled with longer sludge age was observed. The SVI of the SUFR system（θc=32d）was less than 135. And SOUR of the sludge in the aerobic zone of SUFR system（θc=32d）was in the range of 10~18 mgDO/(gVSS·h) , which was lower than that in the SUFR system（θc=20d）. The microbe ecology of the SUFR system（θc=32d）was abundance. The foodchain in the SUFR system（θc=32d）was more full.The study of this dissertation belongs to the scientific research (2001BA604A01) of Tenth Five-Year plan in china. This research acquired the values of important parameters that could be used in actual design and control, provided support for the engineering utilization of the SUFR in municipal wastewater treatment.
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