倒置A2_O—MBR工艺处理低C_N生活污水脱氮性能研究.pdf

倒置A2／0一MBR工艺处理低c／N生活污水脱氮性能研究 崔新伟1 谢 丽1 毕 晔1 张善发2 杨殿海1 Shim H J3 (1同济大学环境科学与工程学院，上海200092；2上海市城市建设设计研究院， 上海200125；3澳门大学土木与环境工程系，澳门853) 摘要合肥塘西河再生水厂采用倒置A2／O(缺氧／厌氧／好氧一预缺氧)一MBR工艺处理低C／N 城市生活污水。研究了投加碳源前后各生化反应池中有机物及氮元素的变化规律，结果表明未投加外 碳源时TN的去除率为52．3％，脱氮效果不理想。通过比较乙酸钠、甲醇和乙酸三种不同外加碳源的脱 氮效果，可知乙酸钠反硝化速率最高，效果最好。当乙酸钠作外碳源，投加量为50 mgCOD／L时，TN的 去除率明显提高，达到74．5％。此外，还分析了投加外碳源后整个工艺系统内COD、TN物质流动情况， 结果表明，缺氧池和厌氧池是(jOD去除的主要单元体，好氧池对COD的去除贡献增强，体系中的TN 去除总量在投加外碳源后有了明显的增加，较未投加外碳源时增加了26．5％。 关键词 倒置A2／o—MBR低碳氮比 脱氮 外加碳源 Study on the nitrogen removal characteristics of inverted A2／o—MBR process to treat low C／N ratio wastewater Cui Xinweil，Xie Lil，Bi Yel，Zhang Shanfa。，Yang Dianhail，Shim H J3 (工．CD比ge o厂妖匍掰删妞￡Sct绷ce a砝鼢gt他折视g，而咒舒t溉主锕s叻，S砌扎ghai 2。0092，吼i舰； 2． S五口咒g矗口主U≯6口咒(力咒s￡r“f￡i07z DPs主g咒口咒d R95Pnrc厅工咒5缸￡甜￡8，S^口规g^口i 200】25，C矗i，z口； 3． CiuiZ口7zd—E理uiron7行P7z￡以Z E咒gi，zegrZ规g DP乡口r￡卯zg咒￡，A巧acn“U矗i可Prsi芒y，Maca甜853，C流i咒n) Abstract：An in、伦rted Az／O(anO)dc／anaerobic／aerobic．pr}ano)dc)一MBR prOcess was applied in Hefei mmg五he reclaimed water trea廿nent pl肌t to rerrDve nutriems from law C／N ratio砌|nidpal sev咒rag已The 、商ances of Org撕cs and nitrOgen in each operational umt谢th and谢thOut addition of e对ernal carbon Source 、v盯e studied．Ibsults showed that the TN rE棚oval efficiency was omy 52．3％without addition of e)(temal carb(m sourcB The conclusion that sodium acetate had the best effect and the higllest denitdfication rate can be obtained by∞mpaIing the effects Of three different e)(七ra carbon SOurces-Sodium acetate，methanol and ace— tic add．Therefore，sodium acetate was added as e】(七emal carb(m SOurce、vith a theOretical anD un_t of 50 H蜒 OOD／L in influent and the TN煳val efficiency waS enhanced si嘶ficantly to 74．5％．Besides，the mat矗al flaw of 00D arld TN were syst咖dcally amlyzed after the soldiuHl acetate was ad(ied The results indicated that the ano妇c tank and锄erobic tarlk were the majn process units for(X日)ren】Oval，While the aerobic tan|【 enhanced the effect of C()D r㈣val effidency．The removalrate of TN in system signi