| 水力停留时间和溶解氧对陶粒CANON反应器的影响 |
| 摘要点击 2397 全文点击 1290 投稿时间：2015-04-02 修订日期：2015-06-20 |
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| 中文关键词 CANON 生物膜 短程硝化 厌氧氨氧化 水力停留时间 溶解氧 陶粒 |
| 英文关键词 CANON biofilm nitritation ANAMMOX hydraulic retention time dissolved oxygen haydite |
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| 中文摘要 |
| 以人工配制无机高氨氮废水为进水,通过接种CANON污泥,以陶粒作为填料,研究了HRT和DO对生物膜CANON反应器的影响. 试验过程中,控制进水氨氮浓度基本不变,依次控制反应器的HRT为9、 7、 5 h,同时控制DO的范围为1.16~3.20 mg ·L-1. 研究发现: ① 当DO为1.20~1.75 mg ·L-1时,尽管提高DO有利于提高AOB的活性和系统内基质的传质效果,但是CANON反应器的NH4+-N、 TN去除效果依然随着HRT的缩短而下降,尤其当DO超过2.50 mg ·L-1时,TN去除效果大幅度下降; ②当DO为1.20~1.75 mg ·L-1时,随着HRT的缩短, CANON反应器的短程硝化性能趋于稳定,而当DO超过1.75 mg ·L-1时,即使缩短HRT,其短程硝化性能依然遭到严重破坏; ③CANON反应器中短程硝化稳定性能和去除效果较佳的条件是HRT为7 h,且DO控制在1.20~1.75 mg ·L-1之间. HRT和DO是废水生物处理的重要运行参数,直接影响到生物处理的效果和出水水质,协调控制两者的变化范围,对提高CANON工艺对高氨氮废水的处理效果非常重要. |
| 英文摘要 |
| One Completely Autotrophic Nitrogen Removal Over Nitrite (CANON) reactor with haydite as carrier was investigated to study the effects of different hydraulic retention time (HRT) and dissolved oxygen (DO) on CANON reactors by seeding sludge from another mature CANON reactor and using synthetic inorganic ammonia-rich waste water as influent. During the experiment, the concentration of influent ammonia nitrogen was basically unchanged, the HRT of the reactor were 9, 7, 5 h in turn and the range of DO was 1.16-3.20 mg ·L-1. The results showed that: ①When DO was 1.20-1.75 mg ·L-1, despite the increase of DO can improve AOB's activity and matrix mass transfer in the system, NH4+-N and TN removal efficiency were still fell with the shortening of HRT for the CANON reactor, especially when DO was higher than 2.50 mg ·L-1, TN removal efficiency dropped sharply; ②Under the condition that DO was 1.20-1.75 mg ·L-1, with the shortening of HRT, partial nitritation tended to be stable in the CANON process, and when DO was higher than 1.75 mg ·L-1, even if HRT was shorter, partial nitritation was still severely damaged; ③Under the condition that DO was 1.20-1.75 mg ·L-1 and HRT was 7 h, for the CANON reactor, partial nitritation and total nitrogen removal efficiency kept well. Hydraulic retention time and dissolved oxygen both are important operational parameters for biological wastewater treatment process, which could directly affect the effect of biological treatment and effluent quality, so to choose appropriate hydraulic retention time and dissolved oxygen coordinately is very important to improve the effect of treatment of ammonium-rich wastewater by CANON process. |
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