同时产甲烷反硝化与硝化串联工艺处理淀粉废水  

Treatment of starch processing wastewater using a combined Simultaneous Methanogenesis and Denitrification (SMD)-nitrification process

作　　者：袁志丹[1] 左剑恶[1] 甘海南 黄占斌[3] 

机构地区：[1]清华大学环境科学与工程系,北京100084 [2]济南十方环保公司,济南250101 [3]中国矿业大学(北京),北京100083

出　　处：《环境科学学报》2008年第7期1272-1278,共7页Acta Scientiae Circumstantiae

基　　金：国家“863”计划重大水专项课题(No.2002AA601190)~~

摘　　要：采用UASB作为同时产甲烷反硝化反应器、AUSB作为好氧硝化反应器的串联工艺处理实际淀粉废水．结果表明：①将好氧反应器的出水硝化液按1：1-3：1的回流比回流到UASB反应器，可在其中实现同时产甲烷反硝化，进水有机（以COD计）负荷约为11kg·m^-3·d^-1时，COD去除率为95％；NO3^--N负荷可达0．48kg·m^-3·d^-1，NO3^--N去除率高达100％．②UASB反应器的出水进入AUSB反应器，其有机负荷为0．5-2．5kg·m^-3·d^-1，去除率为63％-91％；氨氮负荷为0．2-0．9kg·m^-3·d^-1，去除率在98．8％以上．③串联工艺在回流比为1：1、2：1、3：1下，COD去除率分别为98．7％、98．3％、99．3％，总氮去除率分别为72．9％、76．3％、82．9％．④随着UASB反应器内进水硝酸盐负荷的增加，其颗粒污泥与接种污泥相比，粒径明显增加，平均密度先增加后减小，最大比产甲烷活性先降低，而后有较大提高．An Upflow Anaerobic Sludge Blanket reactor （UASB） was combined with an Aerated Upflow Sludge Bed （AUSB） reactor to treat starch processing wastewater, in which the UASB was used as a Simultaneous Methanogenesis and Denitrification （SMD） reactor and the AUSB as an aerobic nitrification reactor. The results showed that： ①Recycling the effluent of the AUSB reactor to the UASB reactor with recycling ratios of 1：1-3：1, could successfully maintain simultaneous methanogenesis and denitrification in the UASB reactor. When the influent organic loading rate was about 11 kg·m^-3. d^-1 and the nitrate loading rate was 0.48 kg·m^-3. d^-1 , the COD and nitrate removal efficiencies were above 95 % and 100% , respectively.②The effluent of the UASB reactor entered the AUSB reactor with an influent organic loading rate of 0.5-2.5 kg·m^-3· d^-1 and an ammonia nitrogen loading rate of 0.2-0.9 kg·m^-3·d^-1, and after treatment the COD and ammonia nitrogen removal efficiencies were about 63 -91% and above 98.8%, respectively.③When the recycling ratios were 1：1, 2：1 and 3：1, the COD removal efficiencies of the whole process were 98.7% ,98.3% ,99.3% and the removal efficiencies of total nitrogen were 72.9% ,76.3% ,82.9%. ④Compared with inoculation sludge, the size of the granular sludge increased obviously, but the average density increased when the nitrate loading rate was lower, then reduced as the nitrate loading rate increased. The specific methanogenic activity was reduced when nitrate was introduced into the UASB reactor initially, but then recovered and increased greatly.

关 键 词：同时产甲烷反硝化 淀粉废水 UASB 回流硝化液 AUSB 

分 类 号：X703[环境科学与工程—环境工程]