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论文类型：期刊论文

发表时间：2022-06-29

发表刊物：环境科学学报

期号：11

页面范围：2361-2367

ISSN号：0253-2468

摘要：A hybrid reactor for anaerobic ammonia oxidation （anammox） process was developed which combined a fixed-bed using non-woven fabrics as biomass carrier with a slow speed agitated bed.The performance of higher biomass retention was obtained in the reactor,and the anammox microorganism in a loose flocculating structure before inoculation formed rapidly into granules.The nitrogen removal ability of the reactor increased obviously in the short term,and the start-up time of the reactor shortened greatly.Only in 38 days,the total nitrogen removal rate （TNRR） reached 1.9 kg·m-3·d-1 and then doubled to 3.8 kg·m-3·d-1 within 17 days.During 180 operating days,a maximum TNRR of 6.6 kg·m-3·d-1 was obtained,and the specific anammox activity （SAA） maintained basically in 0.32 kg·kg-1·d-1.The testing results of size distribution and SEM observation confirmed that anammox sludge granulation process can be greatly enhanced in the mechanical stirred reactor at a lower rotating speed.The anammox bacteria content in the microorganism sludge was about 70%,determined by situ hybridization （FISH） analysis method.

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