HULan-lan,SUNLi-li,LUYin,et al.Effect of COD Pretreatment on Urine Nitrogen Removal Efficiency of CPNA Process[J].China Water & Wastewater,2023,39(17):10-17.
COD预处理对CPNA工艺尿液脱氮效率的影响
- Title:
- Effect of COD Pretreatment on Urine Nitrogen Removal Efficiency of CPNA Process
- Keywords:
- urine; partial nitrification; anammox; COD/N ratio; nitrogen removal
- 摘要:
- 一体式短程硝化/厌氧氨氧化（CPNA）SBR工艺可以有效进行源分离尿液的原位脱氮处理。然而，尿液中高浓度的有机物不利于此工艺的长期稳定运行。为解决此问题，通过一种简易预处理方法去除尿液COD，并初步分析了COD预去除对CPNA-SBR脱氮效率的影响。在尿液中接种SBR污泥可以有效实现部分COD的预去除，这是一个耗氧过程，氧气来自于溶液表面的自然复氧作用，增加气液界面面积有助于加快COD的预去除速率。预处理使得尿液的COD/N从1.78~2.45降至0.81左右，将预处理后的尿液作为反应器进水，SBR运行的周期时间显著缩短约10%~45%，且总氮去除率可由83%升至93%。因此，这一预处理方法适用于尿液中COD的预去除，尤其适用于源分离尿液分散式原位脱氮处理工艺。
- Abstract:
- The combined partial nitrification/anammox (CPNA) SBR process is suitable for in?situ nitrogen removal from source-separated urine. However, high concentration of organic matter may pose a potential risk to the long-term stable performance of the process. In order to avoid this problem, a simple pretreatment technology was employed to remove COD in urine, and its influence on the nitrogen removal via the CPNA-SBR process was evaluated. Part of COD in urine was successfully removed in advance through inoculating the SBR sludge which used the oxygen diffusing from the liquid-gas surface. Increasing the liquid-gas surface could accelerate the removal of COD. The pretreatment reduced the COD/N ratio in urine from 1.78-2.45 to about 0.81. When pretreated urine was used for reactor influent, the cycle time of SBR was reduced significantly by about 10%-45%, and the removal rate of total nitrogen increased slightly from 83% to 93%. Therefore, this simple pretreatment is suitable for the removal of COD in urine in advance, especially in decentralized on site nitrogen removal process for source? separated urine.
相似文献/References:
[1]马跃龙,徐瑶瑶,刘宁,等.SBR/RO工艺源分离尿液处理特性研究[J].中国给水排水,2020,36(21):7.
MA Yue-long,XU Yao-yao,LIU Ning,et al.Treatment Characteristics of Source-separated Urine by SBR/RO Process[J].China Water & Wastewater,2020,36(17):7.
[2]杨皓元,杜子文,张立秋.尿液水解预处理后用于蔬菜水培的效果与风险[J].中国给水排水,2024,40(1):110.
YANGHao-yuan,DUZi-wen,ZHANGLi-qiu.Performance and Risk of Hydrolyzed Urine for Hydroponic Vegetable Cultivation[J].China Water & Wastewater,2024,40(17):110.
[3]陈加波,周鑫,张泽乾,等.一体化厌氧氨氧化工艺研究进展[J].中国给水排水,2024,40(2):18.
CHENJia-bo,ZHOUXin,ZHANGZe-qian,et al.Research Advances of Integrated Anaerobic Ammonium Oxidation (Anammox) Processes: A Review[J].China Water & Wastewater,2024,40(17):18.
[4]张琪,邓迎迎,刘元.从部分水解尿液中同步回收磷资源与电能[J].中国给水排水,2024,40(7):73.
ZHANGQi,DENGYing-ying,LIUYuan.Simultaneous Recovery of Phosphorus and Electricity from Partially Hydrolyzed Urine[J].China Water & Wastewater,2024,40(17):73.
[5]潘凯玲,魏钰轩,邱晨,等.有机物对泥膜复合PNA-MBBR挂膜启动的影响[J].中国给水排水,2024,40(9):69.
PANKai-ling,WEIYu-xuan,QIUChen,et al.Effects of Organic Matter on Start-up of Sludge-Biofilm Hybrid Partial Nitritation Anammox in Moving Bed Biofilm Reactor[J].China Water & Wastewater,2024,40(17):69.
[6]赵钰莹,李倍莹,黄依锟,等.城镇污水高速率短程硝化厌氧氨氧化脱氮[J].中国给水排水,2024,40(13):1.
ZHAOYu-ying,LIBei-ying,HUANGYi-kun,et al.High-rate Nitrogen Removal from Urban Wastewater Using Nitritation and Anaerobic Ammonium Oxidation[J].China Water & Wastewater,2024,40(17):1.