| 合成氨废水短程反硝化特性研究 |
| 摘要点击 2406 全文点击 1661 投稿时间：2011-08-24 修订日期：2011-11-22 |
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| 中文关键词 合成氨废水 短程反硝化 比反硝化速率 碳源 |
| 英文关键词 synthetic ammonia wastewater shortcut denitrification specific denitrification rates carbon source |
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| 中文摘要 |
| 取自强化A/O工艺处理合成氨废水中试装置的活性污泥,在pH、碳源和温度均不为限制性因素条件下,短程反硝化和全程反硝化均为零级反应.结果表明,相对于全程反硝化,短程反硝化可以节约14.1%的碳源和55.7%的反硝化时间; 初始NO2--N为36.82 mg·L-1时反硝化最快,比反硝化速率(以NO2--N/VSS计)为0.509 g·(g·d)-1; pH为7.5时反硝化速率最快,实际运行中应避免缺氧区pH>9; 选择性增殖的反硝化菌对甲醇和乙醇形成了良好的适应性,却对葡萄糖和乙酸等其它低分子易降解有机物产生了不适应性. |
| 英文摘要 |
| Active sludge was from a pilot-scale synthetic ammonia industrial wastewater treatment plant with a strengthen anoxic-oxic (A/O) technology. The zero order kinetic model was suit for describing shortcut and complete denitrification process.Experimental results showed that shortcut denitrification could reduce 14.1% carbon source consumption and 55.7% denitrification time, respectively, comparing with complete denitrification. The maximum specific denitrification rate was 0.509 g·(g·d)-1 with an initial NO2--N concentration of 36.82 mg·L-1 and pH 7.5. In the industrial practice, it must be avoided pH higher than 9.0 in anoxic zone for industrial treatment. Replication-selective denitrifying bacteria showed a strong adaptability to methanol and ethanol, but showed maladaptation to other small molecular and easily biodegradable organics, such as glucose and acetic acid. |
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