[1]李容基,聂正鑫,曹羡,等.不同固体缓释碳源对低碳氮比污水脱氮效果的影响[J].中国给水排水,2026,42(13):63-68.
　LiRongji,NieZhengxin,CaoXian,et al.Effect of Different Solid Slow-release Carbon Sources on Nitrogen Removal from Low Carbon-to-Nitrogen Ratio Wastewater[J].China Water & Wastewater,2026,42(13):63-68.
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不同固体缓释碳源对低碳氮比污水脱氮效果的影响

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第42卷 期数: 2026年第13期 页码: 63-68 栏目: 出版日期: 2026-07-01
Title:
Effect of Different Solid Slow-release Carbon Sources on Nitrogen Removal from Low Carbon-to-Nitrogen Ratio Wastewater
作者:
李容基1， 聂正鑫2， 曹羡1， 李先宁1
（1.东南大学 能源与环境学院，江苏 南京 210096；2.江苏环保产业技术研究院股份公司，江苏 南京 210096）
Author(s):
Li　Rongji1， Nie　Zhengxin2， Cao　Xian1， Li　Xianning1
（1. School of Energy and Environment， Southeast University， Nanjing 210096， China； 2. Jiangsu Academy of Environmental Industry and Technology Corp.， Nanjing 210096， China）
关键词:
固体缓释碳源;  玉米芯;  反硝化;  低碳氮比;  释碳能力
Keywords:
solid slow-release carbon source;  corn cob;  denitrification;  low carbon-to-nitrogen ratio;  carbon release capacity
摘要:
为改善污水低碳氮比（C/N）导致的可生化性差问题，研究了聚乳酸（PLA）颗粒、玉米芯和碱处理玉米芯作为固体缓释碳源的释碳能力和反硝化效果。3种碳源的平均COD释放率分别为0.22、1.18和1.40 mg/（g·d），对硝态氮的去除率分别可达到37.0%、74.4%和88.4%。三维荧光光谱分析表明，玉米芯和碱处理玉米芯在280~360 nm处有两个明显的荧光峰，且碱处理组的荧光强度更高，说明碱处理玉米芯的有机物释放能力更强。扫描电镜结果显示，碱处理玉米芯的表面结构更有利于微生物附着。将3种碳源分别投加到脱氮池，研究其对低C/N污水反硝化的促进作用及出水水质的影响。结果表明，PLA、玉米芯和碱处理玉米芯随着投加量的增加均能有效提升自然复氧生物滤池工艺的TN去除效果，且各处理阶段的C/N有所提高，出水COD和TN浓度均可达标。从成本方面考虑，玉米芯作为外加固体缓释碳源在农村地区的低碳氮比污水处理中更具有应用前景。
Abstract:
To improve the poor biodegradability caused by a low carbon-to-nitrogen (C/N) ratio in wastewater, this study investigated the carbon release capacity and denitrification performance of polylactic acid (PLA) particles, corn cob, and alkali-treated corn cob as solid slow-release carbon sources. The average COD release rates of the three carbon sources were 0.22 mg/(g·d), 1.18 mg/(g·d) and 1.40 mg/(g·d), respectively, and their nitrate nitrogen removal rates reached 37.0%, 74.4%, and 88.4%, respectively. Three-dimensional fluorescence excitation-emission matrix (EEM) spectroscopy analysis revealed two distinct fluorescence peaks for both corn cob and alkali-treated corn cob in the range of 280-360 nm, with the alkali-treated group exhibiting higher fluorescence intensity, indicating a stronger organic matter release capacity. Scanning electron microscopy (SEM) results showed that the surface structure of alkali-treated corn cob was more favorable for microbial attachment. The three carbon sources were respectively added to the denitrification tank to investigate their promoting effects on denitrification of low C/N wastewater and their impact on effluent quality. The results showed that with increasing dosage, PLA, corn cob, and alkali-treated corn cob all effectively enhanced the TN removal efficiency of the natural aeration biofilter process. The C/N ratio at each treatment stage improved, and the effluent concentrations of COD and TN both met the discharge standards. Considering cost factors, corn cob has greater application prospects as an external solid slow-release carbon source for the treatment of low C/N ratio wastewater in rural areas.

相似文献/References:

[1]章厚林,罗忠武,周蜜,等.玉米芯/PHB包覆缓释复合碳源强化生物脱氮性能[J].中国给水排水,2026,42(7):51.
　ZHANGHoulin,LUOZhongwu,ZHOUMi,et al.Investigation on Enhanced Denitrification Performance of a Slow-release Composite Carbon Source Embedded with Corncob/PHB[J].China Water & Wastewater,2026,42(13):51.

更新日期/Last Update: 2026-07-01