工业水处理 ›› 2022, Vol. 42 ›› Issue (12): 128-135. doi: 10.19965/j.cnki.iwt.2022-0190

• 试验研究 • 上一篇    下一篇

香茅/聚砜缓释碳源SBR反应器脱氮效能研究

张克峰1(),王琪琨1,丁万德1,2(),吕东晓1   

  1. 1.山东建筑大学市政与环境工程学院, 山东 济南 250101
    2.山东水发环境科技有限公司, 山东 济宁 272000
  • 收稿日期:2022-10-29 出版日期:2022-12-20 发布日期:2022-12-20
  • 通讯作者: 丁万德 E-mail:kfz@sdjzu.edu.cn;dingwande18@sdjzu.edu.cn
  • 作者简介:张克峰(1964— ),教授,E-mail:kfz@sdjzu.edu.cn|丁万德,讲师,E-mail:dingwande18@sdjzu.edu.cn

Study on denitrification efficiency of citronella/polysulfone slow-release carbon source in SBR

Kefeng ZHANG1(),Qikun WANG1,Wande DING1,2(),Dongxiao LÜ1   

  1. 1.School of Municipal & Environmental Engineering, Shandong Jianzhu University, Ji’nan 250101, China
    2.Shandong Shuifa Environmental Technology Co. , Ltd. , Jining 272000, China
  • Received:2022-10-29 Online:2022-12-20 Published:2022-12-20
  • Contact: Wande DING E-mail:kfz@sdjzu.edu.cn;dingwande18@sdjzu.edu.cn

摘要:

针对低碳氮比废水往往因碳源不足而导致脱氮效果不佳的问题,以香茅/聚砜缓释碳源作为外加碳源,考察用SBR反应器对其进行脱氮处理时的最佳HRT,进水NO3--N负荷及不同种类废水对脱氮效果的影响,选用MiSeq平台对SBR反应器中反应前后的污泥样品进行高通量测序,以确定微生物群落结构的变化。结果表明:当进水为合成废水,NO3--N负荷维持在50 mg/L以下,投加120 g缓释碳源时,SBR反应器的最佳HRT为12 h,此时NO3--N去除率维持在80%以上,出水COD稳定在50 mg/L以下,满足《城市污水处理厂污染物排放标准》(GB 18918—2016)排放要求。对于实际废水的处理,在最佳运行条件HRT为12 h、投加120 g缓释碳源的情况下,NO3--N去除率达到84.1%;由于实际废水含有一定量的碳水化合物、脂肪、蛋白质等有机物,导致出水COD略微上升至60 mg/L。高通量测序结果显示,投加缓释碳源强化了反硝化过程,反硝化菌丰度增加,群落结构更加丰富。

关键词: 香茅, 聚砜, 缓释碳源, 反硝化

Abstract:

To address the problem that low carbon to nitrogen ratio wastewater often has poor denitrification due to insufficient carbon source, the citronella/polysulfone slow-release carbon source was used as an additional carbon source. The optimal HRT, influences of NO3- loading and types of wastewater on the denitrification effect when used in SBR were investigated. The MiSeq platform was used to perform high-throughput sequencing of sludge samples before and after the reaction in SBR to determine the changes in microbial community structure. The results showed that when the influent NO3- was maintained below 50 mg/L and 120 g of slow-release carbon source was injected, the optimal HRT of SBR was 12 h. At this time, the NO3- removal rate was maintained above 80%, and the effluent COD was below 50 mg/L, which met the discharge standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918—2016). For the treatment of actual wastewater, the NO3- removal rate reached 84.1% under the optimal operation condition of HRT of 12 h and the injection of 120 g of slow-release carbon source. The actual wastewater contained a certain amount of organic matter such as carbohydrates, fats and proteins, resulting in a slight increase in effluent COD to 60 mg/L. The high-throughput sequencing results showed that the injection of the slow-release carbon source enhanced the denitrification process, and the abundance of denitrifying bacteria increased and the community structure enriched.

Key words: citronella, polysulfone, slow-release carbon source, denitrification

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