| AAO-生物膜工艺处理电镀废水的脱氮除磷性能 |
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| 引用本文： | 庄桂嘉,刘立凡,黄潇,高静思,朱佳.AAO-生物膜工艺处理电镀废水的脱氮除磷性能[J].环境工程,2022,40(12):128-133. |
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| 作者姓名： | 庄桂嘉 刘立凡 黄潇 高静思 朱佳 |
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| 作者单位： | 1. 广东工业大学 土木与交通工程学院, 广州 510643; |
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| 基金项目： | 深圳职业技术学院配套项目"难降解电镀废水精准预氧化-生物强化技术及微生物代谢机制研究"(6020320003K)广东省教育厅项目"城市智慧水污染防治技术开发中心"(2019GGCZX007) |
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| 摘 要： | 为提高电镀废水的污染物去除效率,探讨厌氧-缺氧-好氧(AAO)-生物膜耦合工艺的有机物去除和脱氮除磷效能。结果表明:AAO-生物膜工艺处理电镀难降解有机废水运行效果良好,COD去除率稳定在89%左右;脱氮主要途径是好氧硝化,缺氧反硝化,60 d运行中系统脱氮率达到70%~80%;难降解有机物影响NH4+-N和COD的去除效率,且存在时间差距,在其影响下,NH4+-N的变化稍滞后于COD。AAO-生物膜工艺的除磷效果经50 d运行后趋于稳定,出水TP浓度低于1 mg/L,去除率>65%,除磷主要依靠厌氧释磷和好氧吸磷过程。
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| 关 键 词： | 电镀废水 AAO工艺 活性污泥-生物膜 难降解有机物 脱氮 除磷 |
| 收稿时间： | 2022-03-02 |
NITROGEN AND PHOSPHORUS REMOVAL PERFORMANCE OF AAO-BIOFILM PROCESS FOR ELECTROPLATING WASTEWATER TREATMENT |
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| Affiliation: | 1. School of Civil and Traffic Engineering, Guangdong University of Technology, Guangzhou 510643, China;2. School of Civil and Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518055, China;3. Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China |
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| Abstract: | To improve the pollutant removal efficiency of electroplating wastewater, the removal efficiencies of organic matter, nitrogen and phosphorus by anaerobic anoxic aerobic (AAO)-biofilm coupling process were discussed. The experimental results showed that the AAO-biofilm process owned good operation performance for treating refractory organic matters in electroplating wastewater, and the COD removal rate was stable at about 89%. The majority of nitrogen was removed through nitrification in the aerobic tank and denitrification in the anoxic tank. The nitrogen removal rate of the system reached 70%~80% after 60 days operation. Refractory organics affected the removal efficiency of NH4+-N and COD and made a time gap between them. The change of NH4+-N lagged behind COD. The phosphorus removal performance of the AAO-biofilm process tended to be stable after 50 days operation, the effluent concentration was less than 1 mg/L, and the removal rate was more than 65%. Phosphorus was mainly removed through anaerobic release and aerobic absorption of the functional microorganisms. |
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