不同污泥源条件下ANAMMOX启动及其与反硝化协同脱氮对比

Comparison of ANAMMOX start-up and its synergistic effect with denitrifying with different seeding sludge sources

采用城市生活污水配水同时启动两组ASBR,R1接种好氧硝化污泥,R2按2∶1混合接种短程硝化和厌氧氨氧化污泥,研究2个ANAMMOX反应器启动的可行性及其差异。实验结果表明,R1和R2均可成功启动ANAMMOX,R1需130 d,R2仅需73 d;稳定期R1和R2反应器NH4+-N、NO2--N和TN去除率分别达95.30%、91.30%、76.28%和96.2%、98.3%、90.1%,且周期内NH4+-N、NO2--N和NO3--N降解规律相似;R1和R2反应器发生的主要反应为厌氧氨氧化,但同时存在反硝化作用;2组反应器稳定运行后污泥颜色、形态及微生物组成相似,经SEM观察多为球状菌。

With the influent water distribution based on the municipal sewage, two ASBRs were started-up simultaneously. With the aerobic nitrification sludge seeded into R1, the mixture of short-cut nitrification and ANAMMOX sludge with the proportion of 2：1 seeded into R2, the feasibility and differences of ANAMMOX start-up in these 2 reactors were studied. The experimental results show that seeding with different sludge sources, these two reactors were both successfully started-up, the starting time of R1 was 130 days, R2 was 73 days. During the stable stage, the NH4＋-N,NO2--N,TN removal rates in R1 and R2 were 95.30%,91.30%,76.28% and 96.2%,98.3%,90.1%, respectively. The degradation pattern of NO2--N, NO2--N andNO3--N in R1 and R2 were similar. The major reaction both in R1 and R2 reactors was ANAMMOX, but the denitrifying reaction offering electron acceptors of NO2--N existed at the same time. After R1 and R2 reached stable, the mature sludge color, shape and microbial composition in these 2 reactors were similar, and the SEM observation showed that most of the bacteria were spherical.