不同价态铁对活性污泥性能的影响  

Effect of Different Valent Iron on Performance of Activated Sludge

作　　者：郑莹[1] 李杰[1] 豆宁龙[1] 王亚娥[1] ZHENG Ying;LI Jie;DOU Ning-long;WANG Ya-e(School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Chin)

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070

出　　处：《中国给水排水》2018年第9期26-32,共7页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51468030)

摘　　要：在SBR反应器中分别投加Fe^0、Fe(Ⅱ)、Fe(Ⅲ),对活性污泥生物量、污泥活性和沉降性能进行分析,比较了不同价态铁对活性污泥性能的影响。结果表明,铁的介入能有效提高活性污泥生物量,改善活性污泥絮凝沉降性能,其中,海绵铁(Fe^0)对活性污泥性能的改善作用最为明显,相对普通活性污泥法,其MLSS提高了2 424 mg/L,MLVSS提高了738 mg/L,比耗氧呼吸速率提高了28.4%,污泥脱氢酶活性提高了84.6%,SVI改善为87 m L/g。活性污泥性能的改善直接影响出水水质,介入海绵铁的SBR反应器对COD、氨氮、TP的平均去除率较普通活性污泥法分别提高了13.3%、7.6%、52.8%,其出水浓度均可达一级A排放标准。这为采用普通活性污泥法的城镇污水处理厂提标改造提供了新思路。In order to improve pollutant removal efficiency of the conventional activated sludge process, the effect of different valent irons on the performance of activated sludge was investigated. Fe＋, Fe（ Ⅱ ） and Fe（ Ⅲ ） were added to SBR reactor respectively to analyze the biomass, activity and sedimentation performance of activated sludge. The results showed that with the interaction of iron, the biomass of activated sludge and flocculation settling performance were improved. The effect of sponge iron （ Fe0 ） was the best. Compared with the traditional activated sludge process, the MLSS, MLVSS, specific oxygen consumption rate, dehydrogenase activity were increased by 2 424 mg/L,738 mg/L, 28.4% and 84.6% respectively, and SVI was reduced to 87 mL/g. The improvement of activated sludge performance was conducive to improving effluent quality. The average removal rates of COD, ammonia nitrogen and TP in the sponge iron SBR reactor were 13.3% , 7.6% and 52.8% higher than the traditional activated sludge process respectively and all three indexes reached the urban sewage A discharge standards.

关 键 词：海绵铁 污泥活性 生物量 沉降性能 比耗氧速率 

分 类 号：TU992[建筑科学—市政工程]