| 不同污水处理工艺非二氧化碳温室气体的释放 |
| 摘要点击 2114 全文点击 855 投稿时间：2016-10-19 修订日期：2016-11-08 |
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| 中文关键词 甲烷 氧化亚氮 A/A/O Orbal氧化沟 污水生物处理 |
| 英文关键词 methane nitrous oxide A/A/O Orbal oxidation ditch biological treatment of wastewater |
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| 中文摘要 |
| 甲烷和氧化亚氮是两种重要的非二氧化碳温室气体.城市污水处理厂是甲烷和氧化亚氮的重要释放源.因此，为探究不同污水处理工艺甲烷和氧化亚氮的释放现状和变化规律，通过浮流式表面集气罩对西安市第三污水处理厂（Orbal氧化沟工艺）和第四污水处理厂（A/A/O工艺）生物处理过程中甲烷和氧化亚氮的排放情况进行测定，比较不同污水处理工艺中非二氧化碳温室气体的释放情况，并以第四污水处理厂为例研究溶解氧、温度对非二氧化碳温室气体释放量的影响.结果表明，西安市第三污水处理厂每m3进水释放甲烷1181 mg（以CH4计）、氧化亚氮36.20 mg（以N2O计），西安市第四污水处理厂每m3进水释放甲烷209 mg（以CH4计）、氧化亚氮54.64 mg（以N2O计）.温度、曝气方式、溶解氧浓度、亚硝酸盐氧化速率和最大产甲烷活性是甲烷和氧化亚氮释放量的重要影响因素. |
| 英文摘要 |
| Methane (CH4) and nitrous oxide (N2O) are two of the most important non-CO2 greenhouse gases. And municipal sewage treatment plant is an important anthropogenic source of CH4 and N2O. Therefore, it is essential to measure the production and emission of CH4 and N2O during biological wastewater treatment process. The surface emission flux isolation chamber was employed to collect the gas sample from the Xi'an No.3 WWTP (the Orbal oxidation ditch process) and Xi'an NO.4 WWTP (A/A/O process) to determine the contents of methane and nitrous oxide. And the effects of temperature and dissolved oxygen concentration on non-CO2 greenhouse gases emission from Xi'an NO.4 WWTP were discussed. The results showed that methane and nitrous oxide emission factors from No.3 WWTP were 1181 mg CH4 per m3 influent and 36.20 mg N2O per m3 influent, respectively while those from the No.4 WWTP were 209 mg CH4 per m3 influent and 54.64 mg N2O per m3 influent. In addition, the important influencing factors which affected methane and nitrous oxide emission were temperature, aeration strategy, DO, nitrite oxidation rate and specific methanogenic activity. |
