Abstract:

The design capacity of wastewater treatment plant for an industrial complex in Hebei Province is 18 000 m³, principally accommodating fermentation wastewater distinguished by its high ammonia-nitrogen concentration and low carbon-to-nitrogen ratio. Initially, the secondary biological treatment utilized the conventional AO process. To meet the evolving demands for pollution mitigation and carbon footprint reduction, the plant was partially retrofitted with anaerobic ammonia oxidation. This study presented the longitudinal tracking and monitoring data post-renovation, alongside an analysis of carbon emissions. The findings indicated that the treatment effect of the retrofitted wastewater treatment facility remained consistent, with average removal rates for COD, TN, and TP at 99.22%, 92.79%, and 98.64%, respectively, aligning with pertinent emission standards. The TN removal capacity of the CANON unit reached 0.377 kg/(m³·d). Under equivalent TN removal conditions,the CANON process resulted in reductions of 35.99% in power consumption, 100% in sludge production, 42.36% in carbon emissions,and 42.5% in operational costs compared to the AO process, demonstrating that anaerobic ammonia oxidation can be effectively applied in treating high ammonia-nitrogen wastewater, This paper provided empirical support for selecting this treatment process for industrial wastewater with high ammonia-nitrogen content.

Key words: high ammonia-nitrogen industrial wastewater, anaerobic ammonia oxidation, nitrogen removal load, carbon emission

摘要：

河北省某工业厂区废水处理厂设计规模为18 000 m³，接纳的废水主要以发酵废水为主，呈现高氨氮、低碳氮比的特征。二级生物处理初建成时使用传统AO工艺处理，为适应减污降碳要求，该厂进行了部分厌氧氨氧化改造，研究报道了改造后长期运行的跟踪监测数据并进行碳排放分析。结果表明：改造后的废水处理厂处理效果稳定，COD、TN和TP的平均去除率分别为99.22%、92.79%和98.64%，主要污染物指标均满足相关排放标准；全程自养脱氮（CANON）单元TN去除负荷达到0.377 kg/（m³·d）；相同TN去除条件下，采用CANON工艺比AO工艺减少了35.99%的电力消耗，减少100%的污泥产生，碳排放减少42.36%，运行成本节约42.5%，表明厌氧氨氧化可成功应用于高氨氮废水领域，为高氨氮工业废水处理工艺的选择提供数据支撑。

关键词: 高氨氮工业废水, 厌氧氨氧化, 脱氮负荷, 碳排放

CLC Number: 

• X703