STABLE OPERATION AND IMPACT RESISTANCE OF CANON PROCESS BASED ON PURE MBBR

YANG Zhong-qi; ZHOU Jia-zhong; HAN Wen-jie; GUAN Yong-jie; ZHOU Hao-ran; WU Di

doi:10.13205/j.hjgc.202108003

Volume 39 Issue 8

Jan. 2022

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YANG Zhong-qi, ZHOU Jia-zhong, HAN Wen-jie, GUAN Yong-jie, ZHOU Hao-ran, WU Di. STABLE OPERATION AND IMPACT RESISTANCE OF CANON PROCESS BASED ON PURE MBBR[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(8): 15-24,33. doi: 10.13205/j.hjgc.202108003

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YANG Zhong-qi, ZHOU Jia-zhong, HAN Wen-jie, GUAN Yong-jie, ZHOU Hao-ran, WU Di. STABLE OPERATION AND IMPACT RESISTANCE OF CANON PROCESS BASED ON PURE MBBR[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(8): 15-24,33. doi: 10.13205/j.hjgc.202108003

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STABLE OPERATION AND IMPACT RESISTANCE OF CANON PROCESS BASED ON PURE MBBR

doi: 10.13205/j.hjgc.202108003

Biofilm Research Institute, Qingdao Spring Water Treatment Co., Ltd, Qingdao 266555, China

Received Date: 2020-09-13
Available Online: 2022-01-18

Abstract

Abstract

A CANON-MBBR system was used to treat the actual sludge-digestion wastewater, and stable operation control strategy of the system was investigated. The results showed that during the stable period, the ammonia nitrogen concentration in the effluent of the system was stable below 25 mg/L and the removal rate was above 96%; the TIN concentration in the effluent was below 70 mg/L and the removal rate was above 87%. The system maintained pure MBBR without the sludge backflow and supplemental injection of strains, and achieved a stable autotrophic denitrification process. During the operation, the impact of water quantity, DO and temperature on the stability of the system were investigated. The results showed that the system still maintained high nitrogen removal performance under the conditions of 1.33 times of water impact, high DO range of 2~4 mg/L and low temperature of 24 ℃. The ammonia-oxidizing bacteria (AOB) and anaerobic ammonia-oxidizing bacteria (AnAOB) were Nitrosomonas and Candidatus Kuenenia, respectively, and their average relative abundance were 6.5% and 30.2%, respectively. The relative abundance of nitrite oxidizing bacteria (NOB) was always lower than 0.1%, which realized NOB suppression. AOB and AnAOB were enriched efficiently by suspended carrier biofilm, but the low AOB abundance of the system limited the further improvement of the system’s nitrogen removal performance.
- pure MBBR,
- autotrophic denitrification,
- moving-bed biofilm reactor,
- pilot scale,
- stable operation,
- impact resistance

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References(47)

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