中文关键词AUSB颗粒污泥中置曝气底部曝气运行稳定性 英文关键词AUSBgranular sludgeintermediate-setting aerationbottom-setting aerationoperational stability

作者	单位	E-mail
成朔	北京工业大学建筑工程学院, 水质科学与水环境恢复工程北京市重点实验室, 北京 100124	xxtcs@qq.com
李冬	北京工业大学建筑工程学院, 水质科学与水环境恢复工程北京市重点实验室, 北京 100124	lidong2006@bjut.edu.cn
张杰	北京工业大学建筑工程学院, 水质科学与水环境恢复工程北京市重点实验室, 北京 100124 哈尔滨工业大学市政环境工程学院, 城市水资源与水环境国家重点实验室, 哈尔滨 150090
李帅	哈尔滨工业大学市政环境工程学院, 城市水资源与水环境国家重点实验室, 哈尔滨 150090
曹瑞华	北京工业大学建筑工程学院, 水质科学与水环境恢复工程北京市重点实验室, 北京 100124
吕赛赛	北京工业大学建筑工程学院, 水质科学与水环境恢复工程北京市重点实验室, 北京 100124

中文摘要 常温（25±1）℃下，向中置（R1）、底部曝气（R2）的AUSB反应器中接种絮状厌氧氨氧化（ANAMMOX）污泥，研究AUSB不同曝气位置对连续流CANON颗粒污泥工艺启动及运行的影响.结果表明，R1、R2分别于第43 d、56 d成功启动CANON颗粒污泥，平均粒径分别为214.79 μm、205.27 μm，特征值（△NO₃^--N/△TN）为0.128、0.129.低氨氮（90 mg ·L^-1）下，逐步增大氮负荷（NLR），AUSB中置曝气更利于CANON颗粒粒径的持续增长及脱氮负荷（NRR）的提高，R1于第88 d颗粒平均粒径即增至507.46 μm，NRR达0.277 kg ·（m³ ·d）^-1；R2污泥颗粒历时108 d，粒径增长至467.72 μm，NRR仅为R1的87.73%.底部曝气AUSB全程好氧模式下长期运行，亚硝酸盐氧化菌（NOB）显著增殖，第125 d后特征值增至0.136±0.004，NRR仅（0.231±0.015）kg ·（m³ ·d）^-1；而中置曝气AUSB特定的缺氧/好氧模式有效抑制了NOB活性，特征值维持在0.127±0.003，NRR为（0.262±0.019）kg ·（m³ ·d）^-1.AUSB中置曝气可促进絮状ANAMMOX污泥演变至CANON颗粒污泥，且系统脱氮性能及运行稳定性均优于底部曝气AUSB. 英文摘要 The impact of different aeration positions on startup and operation of the continuous flow CANON granular sludge process was considered by inoculating flocculent ANAMMOX activated sludge at room temperature (25±1)℃ in two sets of AUSB reactors. The aeration unit of R1 was installed 0.3 m above the base, while the aeration unit of R2 was set at the bottom. R1 and R2 successfully developed the granule CANON process on the 43rd d and 56th d, respectively. The mean particle diameter of R1 granular sludge increased to 214.79 μm, and the eigenvalue (△NO₃^--N/△TN) was maintained at 0.128; whereas, the granular sludge size of R2 rose to 205.27 μm with an eigenvalue maintained at 0.129. The nitrogen loading rate (NLR) was gradually increased in the low ammonia-nitrogen (90 mg·L^-1) wastewater within R1 and R2. This was more beneficial in R1, resulting in the persistent growth of CANON granular sludge and the enhancement of the systematic nitrogen removal rate (NRR). The average particle diameter of R1 rose to 507.46 μm in 88 d, while NRR reached up to 0.277 kg·(m³·d)^-1. R2 granule sludge particle size was 467.72 μm after 108 d of cultivation, and achieved a 0.243 kg·(m³·d)^-1NRR, which was 87.73% of that in R1. During the course of steady operation, the specific anoxic/aerobic mode of R1 effectively suppressed NOB microbial activity, the eigenvalue remained around 0.127±0.003, and the NRR of R1 was maintained at about (0.262±0.019) kg·(m³·d)^-1. However, NOB was propagated observably in the continuously aerobic R2, whose eigenvalue rose to 0.136±0.004, while NRR was merely (0.231±0.015) kg·(m³·d)^-1 after 125 d of long-term operation. During the whole experiment period, the intermediate-setting aerated AUSB accelerated the formation of CANON granular sludge evolving from flocculent ANAMMOX sludge, and better nitrogen removal performance and operational stability were achieved.

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