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CANON中试反应器启动及性能优化
摘要点击 1066  全文点击 390  投稿时间:2018-12-20  修订日期:2019-02-19
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中文关键词  全程自养脱氮(CANON)  自养脱氮  移动床生物膜工艺(MBBR)  厌氧氨氧化(ANAMMOX)  污泥消化液  中试
英文关键词  completely autotrophic nitrogen removal over nitrite (CANON)  autotrophic  moving bed biofilm reactor (MBBR)  anaerobic ammonium oxidation (ANAMMOX)  sludge-digestion wastewater  pilot scale
作者单位E-mail
孙庆花 青岛思普润水处理股份有限公司, 青岛 266555 sunqinghua@qdspr.com 
吴迪 青岛思普润水处理股份有限公司, 青岛 266555 wudi@qdspr.com 
周家中 青岛思普润水处理股份有限公司, 青岛 266555  
郑志佳 青岛思普润水处理股份有限公司, 青岛 266555  
中文摘要
      以青岛某污水处理厂污泥消化液为连续进水,控制温度在(30±3)℃,接种污水厂普通活性污泥,驯化启动CANON反应器.为解决菌种流失、优化反应器性能,向CANON反应器内投加悬浮生物载体,转换为生物膜CANON反应器.结果表明,经过130 d运行培养,总氮去除负荷达到0.03 kg·(m3·d)-1,硝酸盐生成量与氨氮减少量的比值(RNaA)平均为0.09,接近理论值0.11,由此判断CANON反应器启动成功.CANON活性污泥反应器共运行300 d,稳定运行时总氮去除负荷为0.20 kg·(m3·d)-1.投加悬浮载体后,经过30d运行培养,系统成功转换为纯膜系统,载体表面生物膜转为淡红色,TN平均去除负荷达到0.17 kg·(m3·d)-1RNaA平均为0.14,略大于理论值0.11.由此判断CANON污泥在MBBR工艺中逐渐适应并得以稳定运行.CANON-MBBR反应器共运行200 d,稳定运行期间,总氮去除负荷为1.15 kg·(m3·d)-1.高通量测序结果表明,CANON-MBBR成功启动后,AOB和AnAOB是系统中的优势菌种,相对丰度分别达到26.24%和30.08%,NOB被成功抑制.以上结果表明,以高密度聚乙烯填料为悬浮载体的CANON-MBBR具有良好的脱氮效能,有利于自养脱氮工艺的稳定运行.
英文摘要
      A completely autotrophic nitrogen removal over nitrite (CANON) reactor was established by seeding ordinary activated sludge with reject water as the influent at (30±3)℃ from a sewage treatment plant in Qingdao. To solve bacterial loss and optimize reactor performance, a suspension of biological carriers was added to the CANON reactor. The result showed that the reactor was successfully started 130 days later. The total nitrogen removal load was up to 0.03 kg·(m3·d)-1, and the average variation ratio of nitrate and ammonia (RNaA) was 0.09, which was close to theoretical value 0.11. The CANON active sludge reactor ran for 300 days. During the stable operation period, the total nitrogen removal rate was stable at 0.20 kg·(m3·d)-1. Red granular sludge was mixed with the effluent of the system, and the particle size of granular sludge was between 1 and 3 mm. The suspension carriers were added to the CANON reactor with a filling rate of 30%. The fillers added to the moving bed biofilm reactor (MBBR) were mature fillers in the nitrifying reactor of the laboratory. The accumulation rate of nitrification was greater than 95%, and the ammonia-oxidized surface load reached 2.0 g·(m2·d)-1. After 30 days of operation and culturing, the system was successfully converted to a pure membrane system, and the biofilm on the surface of the carrier turned pale red. The total nitrogen removal load was up to 0.17 kg·(m3·d)-1. The average RNaA was 0.14, which was slightly higher than the theoretical value of 0.11. This suggested that the CANON sludge adapted to the environment in the MBBR and began to enter a stable stage. The CANON-MBBR ran for 200 days. During the stable operation period, the total nitrogen removal rate was stable at 1.15 kg·(m3·d)-1. The biofilm was bright brick red with a thickness of 150-250 μm. MLSS and MLVSS on the carriers were approximately 10200 mg·m-2 and 9000 mg·m-2, respectively, and the total biomass in the system was approximately 1.5 kg. Through high-throughput sequencing, AOB and AnAOB were found to be the dominant bacteria species on the suspension carrier, with a relative abundance of 26.24% and 30.08%, respectively, and nitrate oxidizing bacteria were successfully suppressed. The above results showed that CANON-MBBR with high-density polyethylene filler as the suspension carrier had good nitrogen-removal efficiency and was conducive to the stable operation of the autotrophic nitrogen removal process.

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