| 含海水污水的短程硝化反硝化 |
| 摘要点击 1599 全文点击 2758 投稿时间：2002-08-30 修订日期：2002-11-08 |
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| 中文关键词 含海水污水 游离氨浓度 短程硝化反硝化 NH4+-N负荷 NH4+-N去除率 |
| 英文关键词 wastewater containing seawater free ammonia (FA) nitrification denitrification via nitrita pathway NH4+-N load, nitrogen removal |
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| 中文摘要 |
| 采用SBR工艺通过控制游离氨(FA)浓度实现了含海水生活污水的短程硝化反硝化脱氮,并研究了不同海水盐度情况下,温度、pH值、NH4+-N负荷等诸因素对短程硝化反硝化的影响.试验结果表明:大生活用水范围内的海水盐度情况下仍可实现短程硝化反硝化,但不同海水盐度情况下的NH4+-N去除率与NHH4+-N负荷有关,随着海水占生活污水比例的增加NH4+-N负荷应逐渐减少.当NH4+-N负荷小于0.15kg/(kg·d)时,短程硝化的NH4+-N去除率仍可达到90%以上.升高温度有利于提高短程硝化脱氮效率,当温度从20℃升高到30℃时,亚硝化比增长速率增加1倍.反应温度应保持在25℃～30℃,pH值的最佳范围为7.5～8.5.较高的进水pH值有利于通过游离氨浓度控制亚硝酸型硝化的形成. |
| 英文摘要 |
| With control of the concentration of free ammonia (FA), shortened nitrification denitrification was accomplished in SBR to achieve enhanced nitrogen removal from the sewage containing seawater. Several parameters which included salinity, temperature, pH and NH4+-N load were studied to evaluate their effects. The results of experiences indicated that shortened nitrification denitrification can be accomplished in sewage containing seawater with relatively high salinity. With various salinity, the nitrogen removal efficiency had relationship with the NH4+-N load, there should be a lower NH4+-N load when the salinity was high. The nitrogen removal efficiency reached above 90% when the NH4+-N load was not exceed 0.15kg /(kg·d). Elevation of the temperature availed to higher nitrogen removal efficiency, this efficiency doubled when the reaction temperature was changed from 20℃ to 30℃. Relatively high value of pH, in the range of 7.5 and 8 5 had advantage to achieve effective shortened nitrification denitrification which caused by the selective inhibition of free ammonia(FA). |
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