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硝化作用强度对EBPR工艺运行效果的影响 被引量:1
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作者 王可馨 王世明 顾向阳 《南京农业大学学报》 CAS CSCD 北大核心 2024年第3期462-467,共6页
[目的]本文旨在探究硝化作用强度对强化生物除磷(EBPR)工艺运行效果的影响。[方法]采用厌氧-好氧型序批式生物反应器(SBR)驯化得到EBPR污泥,将进水氨氮浓度提高至48 mg·L^(-1),比较无硝化抑制剂和添加硝化抑制剂2种条件下EBPR系统... [目的]本文旨在探究硝化作用强度对强化生物除磷(EBPR)工艺运行效果的影响。[方法]采用厌氧-好氧型序批式生物反应器(SBR)驯化得到EBPR污泥,将进水氨氮浓度提高至48 mg·L^(-1),比较无硝化抑制剂和添加硝化抑制剂2种条件下EBPR系统中硝化作用强度及除磷效率的变化,分析硝化作用强度对EBPR工艺运行效果的影响。在系统运行各阶段均取1个周期,测定混合液中磷酸根、氨氮、硝氮、亚硝氮质量浓度以及EBPR污泥中糖原、聚羟基烷酸(PHA)含量的周期变化,分析硝化作用强度对聚磷菌代谢的影响。[结果]在进水氨氮浓度提高至48 mg·L^(-1)且无硝化抑制剂的情况下,硝化作用强度逐渐增强,17 d后硝化反应速率上升至1.45~1.80 mg·h^(-1)·g^(-1),系统出现了好氧磷释放现象,导致除磷效率大幅下降,同时出现糖原的降解量与合成量显著上升、PHA的合成量与降解量显著下降等代谢异常现象;再次加入硝化抑制剂,系统的除磷功能在24 h内恢复正常。[结论]EBPR工艺运行效果与硝化作用强度密切相关,当硝化反应速率上升到一定程度时可引起好氧磷释放现象,导致EBPR工艺除磷效率大幅下降。 展开更多
关键词 强化生物除 糖原 聚羟基烷酸 硝化反应速率 好氧磷释放
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Competition for Single Carbon Source Between Denitrification and Phosphorus Release in Sludge under Anoxic Condition 被引量:12
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作者 彭赵旭 彭永臻 +1 位作者 桂丽娟 刘旭亮 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第3期472-477,共6页
In order to investigate the competition for carbon source between denitrification and phosphorus release processes,simultaneous phosphorus release and denitrification in sludge operated in anoxic,aerobic mode are inve... In order to investigate the competition for carbon source between denitrification and phosphorus release processes,simultaneous phosphorus release and denitrification in sludge operated in anoxic,aerobic mode are investigated by varying the ratio of influent COD to nitrogenous compound concentration under anoxic condition using a lab-scale sequencing batch reactor(SBR).The results show that the nitrate reduction rate is nearly independent of the ratio of influent COD to nitrate under anoxic condition.More NOx^--N in the influent leads to less PO4^3--P release during the feeding period.However, PO4^3--P release proceeds at a low rate simultaneously with denitrification even when the influent NOx^--N concentration is as large as 20 mg·L^-1and its rate is increased obviously when NOx^--N is denitrified to a concentration lower than 0.5 mg·L^-1.The variation of pH during anoxic period gives some information about the biochemical reactions of denitrification and PO4^3--P release.When more nitrate is present in the influent,more acetate uptake in feeding period is used for direct microorganism growth. 展开更多
关键词 DENITRIFICATION SBR phosphorus release pH organic substrate
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