温度对好氧颗粒污泥处理纤维素乙醇废水脱氮效能的影响  

Effect of temperature on nitrogen removal from cellulosic ethanol wastewater by aerobic granular sludge

作　　者：李雪[1] 刘苏彤 梁红[1] 高大文[1,2] 

机构地区：[1]东北林业大学林学院,哈尔滨150040 [2]哈尔滨工业大学城市水资源与水环境国家重点试验室,哈尔滨150090

出　　处：《环境科学学报》2017年第4期1436-1443,共8页Acta Scientiae Circumstantiae

基　　金：黑龙江省自然科学基金重点项目(No.ZD201412)~~

摘　　要：采用SBR反应器,考察了温度对好氧颗粒污泥处理纤维素乙醇废水脱氮性能的影响.研究结果表明,当进水为纤维素乙醇废水原水时,稳定阶段不同温度(10、20、30℃)条件下体系对COD的去除率分别为10.2%、12.7%、13.7%;总无机氮的去除率分别为42.8%、53.6%、70.5%,温度的升高明显地提高了硝化菌的活性和生长速率,进而促进了脱氮效果.当进水为纤维素乙醇废水经IC工艺处理后的厌氧出水时,3个温度条件下系统对废水中有机物的去除效果无较大差异,去除率均低于15%,主要因为纤维素乙醇废水的厌氧处理出水中的有机物很难被微生物利用;而温度对脱氮效果影响较大,30℃下NH_4^+-N去除率达到60.9%,分别是10℃和20℃时的2.0和1.3倍,并且,随着温度的升高总无机氮的去除率增强,NO_3^--N的去除量增加.由于体系COD去除率低说明反硝化可利用的碳源不足,因此,系统内可能存在内碳源反硝化作用,而且内碳源反硝化作用也随着温度的升高而增强.通过氮平衡计算可知,3个温度条件下氮损失分别为37.6%、45.0%、53.6%,说明温度的升高不仅提高了硝化菌活性,还促进了内碳源反硝化,进而提高了对氮素的去除.The effect of temperature on nitrogen removal from cellulosic ethanol wastewater by aerobic granular sludge was investigated using a Sequencing batch Reactor （SBR）. The experiments were conducted at 10, 20, and 30 ℃. The results show that the COD removal under three different temperatures were 10.25%, 12.69%, 13.68% when fed with the raw cellulosic ethanol wastewater. The total inorganic nitrogen removal were 42.75%, 53.56%, 70.46% respectively, indicating that higher temperature was able to improve the activity and growth rate of ammonia oxidizing bacteria and nitrite oxidizing bacteria, and further to promote nitrogen removal. However, the COD removal efficiencies at three different temperatures were almost same （less than 15% ） when fed with the effluent from an anaerobic reactor （ IC ）. The main reason caused for low COD removal is that the organic matters in effluent of IC were hard biodegradable. But nitrogen removal is highly temperature-dependent, and the removal of NH4＋-N was 60.90% at 30 ℃, 1.96 and 1.32 times higher than those under 10℃ and 20℃, respectively. The removal of total inorganic nitrogen and NOs-N was improved with the increasing temperature. Due to the biodegradable organic matters insufficient in the reactor, the denitrification via endogenous carbon source may play a key role and was also enhanced by the increasing temperature. The nitrogen balance analysis results show that the nitrogen losses were 37.6%, 45.0% and 53.6% at different temperatures, which indicates rising temperature enhances the activity of microorganisms for denitrification via endogenous carbon source.

关 键 词：纤维素乙醇废水 温度 好氧颗粒污泥 脱氮 氮平衡 

分 类 号：X17[环境科学与工程—环境科学]