温度对常温UASB运行的影响  

Research on the Influence of Temperature on the Operation of UASB

作　　者：傅金祥[1] 宋奇[1] 李璐[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2007年第6期990-993,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省自然科学基金(20022007)

摘　　要：目的分析常温条件下温度对UASB运行的影响规律，为北方寒冷地区运用常温UASB处理污水提供实验数据和理论基础.方法用常温UASB反应器处理高浓度有机废水，维持进水COD浓度、HRT和pH值一定，考察不同温度段对UASB运行的影响.结果通过对8-10℃、11-14℃、15-17℃、18-23℃4组温度区间去除效果的对比，验证了随温度上升厌氧微生物的活性增强的理论.温度升到14℃以上去除率呈明显上升趋势.对于温度短期的突变，日平均去除率变化不大，表明UASB厌氧反应器对温度的突变有一定的调节适应能力.结论不同的微生物生长需要不同的温度范围，根据温度对厌氧微生物代谢速率的影响，理论上不宜选用低温厌氧，但是只要对反应器酸化进行严格的控制，微生物仍然具有较高的代谢速率，对于一些温度较低的废水，当需要消耗很多能量使水温升高时，低温厌氧是可以选择的.In the paper, the influence of temperature on the operation of UASB at room temperature was analyzed to supply experimental data and theoretical basis for the operating of UASB in cold northern area. High - concentration organic wastewater was treated in UASB under room temperature, and the influence of temperature in different range were studied through maintaining COD concentration, HRT and Ph value. Comparing the removal effects in four different temperature ranges, i. e. 8- 10℃, 11 - 14℃, 15 - 17℃, 18 -23℃, the result proved the theory that the activity of anaerobe was enhanced with temperature dropping. The removal above 14℃ showed a rising trend. With temperature short - term mutating, the daily average removal changed little, which showed UASB had some adjusting ability to temperature mutation. Different microbe need different temperatures, according to the influence of temperature on anaerobe metabolics speed, so it＇s not proper to select hypothermia, but the microbe would maintain higher metabolic speed if the problem of acidification in the reactor was strictly controlled. Some wastewater with lower temperature could also select the hypothermia anaerobic treating, when large energy is needed to heat the water.

关 键 词：UASB反应器 常温运行 低温地区 沼气 

分 类 号：X703.1[环境科学与工程—环境工程]