IC+CASS处理乳酸废水的生产性启动研究

【作者】 刘琼；

【导师】 买文宁；

【作者基本信息】 郑州大学 ， 环境工程， 2007， 硕士

【摘要】 本论文以河南金丹乳酸有限公司的乳酸废水处理工程为研究对象，通过仔细调研相关资料，详细分析乳酸废水的产生来源、水量和水质特征，综合对比国内外乳酸废水处理工程采用的相关处理技术，运用厌氧和好氧技术，确定试验方案，进行测试分析。本文重点研究了IC反应器处理乳酸工业废水的生产性启动规律，同时为IC+CASS工艺在乳酸废水处理中的应用提供了经验数据，有一定的参考价值。根据IC反应器中有机物的降解和细胞合成的关系，建立了进料有机负荷模型M_n=（1+k）^n-1M₁和容积负荷模型N_n=（1+k）^n-1N₁，并根据该模型制定了进料负荷方案。接种污泥为郑州市污水处理厂的厌氧脱水污泥，接种后IC反应器的污泥浓度为12.4gVSS／L。2006年8月开始对IC反应器进行启动研究，至2007年2月份结束，历时6个月。启动过程采用间歇式脉冲进水，保持进水浓度稳定变化，通过逐渐增加进水量来提高有机负荷。当IC反应器达到了设计的水质水量时，反应器中形成了颗粒污泥并进入稳定运行期。通过分析IC反应器COD去除率、pH值、VFA、温度随启动进行的变化曲线，以及颗粒污泥的形成过程，CASS反应器运行情况，可以得出如下结论：①、IC反应器作为第三代高效厌氧反应器可以成功用于乳酸废水处理，并取得了较好的处理效果，这对于拓宽IC反应器的应用范围有着积极的意义。②、IC反应器在5.4kgCOD／（m³·d）的容积负荷下，能够稳定运行，COD的平均去除率为86.6％。反应器中可形成直径为1～5mm的黑色、球形、边缘光滑的颗粒污泥。③、根据反应器中有机物的降解和细胞合成关系，所采用的进料模型是正确的，进料负荷的方案是切实可行的。④、CASS反应器为进一步降低COD并达到排放标准提供了保证，可以较好地防止乳酸废水处理中污泥膨胀地发生。⑤、本研究采用的预处理+IC+CASS工艺对乳酸生产废水中有机物的去除能力稳定，总COD去除率可达到97.2％。实践表明，将该工艺用于处理难降解的乳酸废水是切实可行的，具有一定的推广价值。更多还原

【Abstract】 The lactic acid wastewater treatment project in Henan Jindan lactic acid Co.Ltd was studied in this paper. The article collected concerned information, and analyzed the souse、the flux and the feature of water of the lactic wastewater. The article also compared lactic wastewater disposal technology with the overseas. Through applying the anaerobic and aerobic technology, determining test plan, carrying out local test analysis. The article has mostly studied the first start-up rule and offered empirical data on the craft of IC +CASS in treating lactic wastewater, so it had the certain reference value.Basing on the connection of the organism degradation and cellular composing in the IC, an influent model on organic loads M_n=（1+k）^n-1M₁ and space loads N_n=（1+k）^n-1N₁ were established. The projects of influent wastewater were also presented. The large percentage of inoculation sludge came from anaerobic dehydration sludge of domestic wastewater treatment plant of Zhengzhou city .At the beginning of the start-up, the sludge concentration of IC were 12.4gVSS/L.The start-up of the IC reactor lasted 6 months from August 2006 to February 2007. We explored low strength influent wastewater and maintain the wastewater strength, at the same time we improved the organic loads gradually by increasing the water quantity up to the design capacity. When the IC reactor has reached the design influent strength, a large amount of granular sludge has been cultivated in the IC reactor. All those indicate the IC reactor has been started up successfully.Through analyzing the curves of the removing rate of COD、pH、VFA、temperature,we drew the following conclusions,as well as the granular sludge forming process and the running situation of the CASS reactor:①、The IC reactor has been successfully used in lactic acid wastewater processing as the third generation highly effective anaerobic reactor,and has obtained the better processing effect.It has the positive significance for widening the application scope of theIC reactor.②、The IC reactor can stably run on the condition of 5.4kgCOD/ （m³·d） space loads. The COD removals can arrtive at 86.6%. A large amount of granular sludge has been cultivated in the IC reactor.③、According the relation between the organism degeneration and the cellular composing in the IC reactor,we established the influent model on organic loads and space loads.And the practice can prove that the method is feasible.④、The CASS reactor provided the guarantee for further reducing COD and achieving the discharging standard.And the reactor can be used to prevent sludge bulge occurrence in the processing of lactic acid wastewater.⑤、In the research we adopted the craft of pretreatment +IC +CASS to treat lactic acid wastewater.The ability of removing organic matter is stable, and the total removeing rate of COD may achieve 97.2%.The practice indicated that the craft of processing lactic wastewater which is difficult to degrade is practical feasible and has the certain promoted value.更多还原