好氧颗粒污泥同步脱氮特性  

Simultaneous denitrification characteristics of aerobic granular sludge

作　　者：柏义生[1,2] 于鲁冀[1,3] 王震[3] 范铮[1,2] 孔德芳[1,2] 

机构地区：[1]郑州大学环境技术咨询工程公司,郑州450002 [2]郑州大学环境政策规划评价研究中心,郑州450002 [3]郑州大学水利与环境学院,郑州450002

出　　处：《环境化学》2013年第11期2186-2192,共7页Environmental Chemistry

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07210-002-002)资助

摘　　要：通过人工配水模拟味精废水培养出了好氧颗粒污泥,实验结果显示,成熟的好氧颗粒污泥粒径平均为2 mm左右,污泥沉降性能(Sludge volume index,SVI)约为20 mL·g-1左右,污泥浓度(Mixed liquor suspended solids,MLSS)达到10 g·L-1;典型周期内,COD、NH+4-N和TN去除率分别为96.51%、93.30%和73.04%,出水COD、NH+4-N和TN浓度分别为57.77、6.25 mg·L-1和25.78 mg·L-1,出水NO3-N和NO2-N浓度分别为17.56 mg·L-1和0.26 mg·L-1,废水中的氮一部分转化为NO2-N和NO3-N,同时在颗粒内部反硝化菌的作用下,另一部分氮被转化为N2.结合电子显微镜扫描和变性梯度凝胶电泳技术(Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis,PCR-DGGE),分析了好氧颗粒污泥微生物种群结构及优势菌种,从而进一步探讨了好氧颗粒污泥同步脱氮特性.In this paper, aerobic granular sludge was cultured with artificial water. The results showed that the granule formed was an average 2 mm in diameter, and the Sludge Volumetric Index （SVI） and the Mixed Liquid Suspended Soilds （MLSS） in the reactor were about 20 mL·L-1 and above 10 g·L-1, respectively. In a typical cycle, the removal rates of COD, NH4＋ -N and TN reached 96.51%, 93.50% and 73.04% in the reactor, respectively. The concentrations of COD, NH4＋ -N and TN in the effluent from the granular reactor were 57.77 mg. L- i, 6.25 mg·L-1 and 25.78 mg·L-1, respectively. The concentrations of NOs-N and NO2 -N in the effluent from the granular reactor were 17.56 mg·L-1 and 0.26 mg·L-1. Some of the nitrogen species in the wastewater were converted to NO2-N and NOs-N. At the same time, under the action of denitrifying bacteria in the interior of the particle, same other nitrogen species were converted to N2. The aerobic granular sludge microbial community structure and dominant species were analyzed by scanning electron microscopy and PCR-DGGE, so as to explore the characteristics of simultaneous denitrification of aerobic granular sludge.

关 键 词：SBR体系 好氧颗粒污泥 同步脱氮 

分 类 号：X703.3[环境科学与工程—环境工程]