摘要
在常温(20~23℃)条件下,采用SBR反应器处理生活污水,通过两段式曝气的方法,控制氨氧化细菌(AOB)的比增长速率高于亚硝酸盐氧化细菌(NOB),经过80个周期的运行实现了短程硝化的快速启动并稳定运行。当COD降解过程结束后,比耗氧速率(SOUR)可以直观反映AOB比增长速率的变化规律。短程硝化实现前后的扫描电镜(SEM)图片表明,在短程硝化实现过程中,污泥中的杆状菌逐渐减少,球状和椭球状细菌逐渐增加。对克隆文库的结果进行分析,发现污泥中的细菌分属8个不同的细菌类群,种类比较丰富,其中优势菌群为β-变形菌和拟杆菌门。
At normal temperature of 20—23℃, the domestic wastewater was treated in a sequencing batch reactor(SBR). The specific growth rate of ammonia oxidizing bacteria(AOB) was kept higher than nitrite oxidizing bacteria(NOB) via the two-stage aeration. After 80 cycles, the rapid startup of the partial nitrification was realized and operated steadily. The results showed that the specific oxygen uptake rate(SOUR) could reflect the variation of the specific growth rate of AOB when chemical oxygen demand(COD) had been largely degraded. Analyzing the scanning electron microscopy(SEM) images in different periods, it indicated that the quantity of bacillus was decreased and the quantity of spherical or elliptic spherical bacteria was increased. The establishment of 16 S r DNA clone library indicated that the species of bacteria were rich and the microbes belonged to eight different groups of bacteria. Moreover, the β-Proteobacteria and Bacteroidetes were the dominant bacterial groups.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2016年第4期1497-1504,共8页
CIESC Journal
基金
国家水体污染控制与治理科技重大专项(2014ZX07201-011)
建筑室外水系维护与节水关键技术研究(2013BAJ02B02)~~
关键词
短程硝化
曝气
SBR反应器
生活污水
比耗氧速率
分子生物学
partial nitrification
aeration
sequencing batch reactor
domestic wastewater
specific oxygen uptake rate
molecular biology