限制曝气实现常温条件下生活污水短程硝化

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限制曝气实现常温条件下生活污水短程硝化

彭永臻^a; 高守有^b; 王淑莹^a; 白璐^a

^a Key Laboratory of Beijing for Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100022, China ^b Beijing General Municipal Engineering Design & Research Institute, Beijing 100045, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-02-28 发布日期:2007-02-28
通讯作者: 彭永臻

Partial nitrification from domestic wastewater by aeration control at ambient temperature

PENG Yongzhen^a; GAO Shouyou^b; WANG Shuying^a; BAI Lu^a

^a Key Laboratory of Beijing for Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100022, China ^b Beijing General Municipal Engineering Design & Research Institute, Beijing 100045, China

Received:1900-01-01 Revised:1900-01-01 Online:2007-02-28 Published:2007-02-28
Contact: PENG Yongzhen

摘要/Abstract

摘要： The objective of this paper was to examine the feasibility of partial nitrification from raw domestic wastewater at ambient temperature by aeration control only. Airflow rate was selected as the sole operational parameter. A 14L sequencing batch reactor was operated at 23℃ for 8 months, with an input of domestic wastewater. There was a programmed decrease of the airflow rate to 28L•h－1, the corresponding average dissolved oxygen (DO) was 0.32mg•L－1, and the average nitrite accumulation rate increased to 92.4% in 3 weeks. Subsequently, further increase in the airflow rate to 48L•h－1 did not destroy the partial nitrification to nitrite, with average DO of 0.60mg•L－1 and nitrite accumulating rate of 95.6%. The results showed that limited airflow rate to cause oxygen deficiency in the reactor would eventually induce only nitrification to nitrite and not further to nitrate and that this system showed relatively stability at higher airflow rate independent of pH and temperature. About 50% of influent total nitrogen was eliminated coupling with partial nitrification, taking the advantage of low DO during the reaction.

关键词: partial nitrification;oxygen-limiting condition;ambient temperature;domestic wastewater

Abstract: The objective of this paper was to examine the feasibility of partial nitrification from raw domestic wastewater at ambient temperature by aeration control only. Airflow rate was selected as the sole operational parameter. A 14L sequencing batch reactor was operated at 23℃ for 8 months, with an input of domestic wastewater. There was a programmed decrease of the airflow rate to 28L•h－1, the corresponding average dissolved oxygen (DO) was 0.32mg•L－1, and the average nitrite accumulation rate increased to 92.4% in 3 weeks. Subsequently, further increase in the airflow rate to 48L•h－1 did not destroy the partial nitrification to nitrite, with average DO of 0.60mg•L－1 and nitrite accumulating rate of 95.6%. The results showed that limited airflow rate to cause oxygen deficiency in the reactor would eventually induce only nitrification to nitrite and not further to nitrate and that this system showed relatively stability at higher airflow rate independent of pH and temperature. About 50% of influent total nitrogen was eliminated coupling with partial nitrification, taking the advantage of low DO during the reaction.

Key words: partial nitrification, oxygen-limiting condition, ambient temperature, domestic wastewater

彭永臻, 高守有, 王淑莹, 白璐. 限制曝气实现常温条件下生活污水短程硝化[J]. , DOI: .

PENG ,Yongzhen, GAO ,Shouyou, WANG ,Shuying, BAI ,Lu. Partial nitrification from domestic wastewater by aeration control at ambient temperature[J]. , DOI: .

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