| 有机碳源环境下亚硝酸盐的积累 |
| 摘要点击 1991 全文点击 1202 投稿时间：2007-10-09 修订日期：2007-12-28 |
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| 中文关键词 SHARON C/N 亚硝酸盐积累 高氨氮有机废水 |
| 英文关键词 SHARON C/N ratio nitrite accumulation ammonia-rich organic wastewater |
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| 中文摘要 |
| 采用CSTR反应器实现SHARON过程，考察了有机碳源存在下亚硝酸盐的积累过程，着重研究了当温度35℃、DO 1.5～2 mg/Ｌ、HRT=1 d、进水pH值为8时，C/N对亚硝酸盐积累及出水NO-2-N∶NH+4-N的影响.结果表明，当进水中NH+4-N浓度为360 mg/Ｌ，C/N不超过0.42时，有机碳源的存在有利于亚硝酸盐的积累；在C/N 0.17～0.34范围内，SHARON反应器出水适合后续ANAMMOX进水的要求；加入有机碳源后pH值降低0.2～0.4，当C/N不超过0.5时，SHARON反应器出水pH值均处于ANAMMOX的适宜范围内；在C/N为0～0.5范围内，随C/N的增加COD去除率从约90％大幅降低至约44％后又大幅提高至约82％.加入有机碳源后，由于异养菌的生长污泥浓度以及污泥中有机物含量升高，形成了紧密的絮状结构的污泥. |
| 英文摘要 |
| Nitrite accumulation in CSTR reactor for the artificial ammonia-rich organic wastewater was studied in this paper. It was focused that the effect of C/N to nitrite accumulation and NO-2-N∶NH+4-N in the effluent under the condition of 35℃,dissolved oxygen(DO) 1.5-2 mg/Ｌ, hydraulic retention time(HRT) 1 day and pH 8. The results showed that organic carbon was benefit to nitrite accumulation when C/N was lower than 0.42 with NH+4-N concentration being 360 mg/Ｌ；The suitable C/N for SHARON-ANAMMOX process was in the range of 0.17-0.34；The pH value decreased 0.2-0.4 while organic carbon was added to the artificial ammonia-rich wastewater, the pH value of the effluent of SHARON reactor was suitable for ANAMMOX when C/N was lower than 0.5. With C/N increased, the COD removal rate decreased from 90% to 44% and then stabilized at 82%, which was correlated to an increase of both biomass and organic content increased while organic carbon was added to the artificial ammonia-rich wastewater which can be attributed to the heterotrophic bacteria, at the same time small flocks was formed. |
