| 硫磺和黄铁矿为填料的生物滤池自养反硝化强化处理二沉尾水 |
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| 引用本文： | 李芳芳,施春红,周北海,李海波.硫磺和黄铁矿为填料的生物滤池自养反硝化强化处理二沉尾水[J].环境科学研究,2016,29(11):1693-1700. |
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| 作者姓名： | 李芳芳 施春红 周北海 李海波 |
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| 作者单位： | 1.北京科技大学土木与环境工程学院环境工程系, 北京 100083 ;工业典型污染物废物资源化处理北京市重点实验室, 北京 100083 |
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| 基金项目： | 国家海洋公益性行业科研专项(201405035) |
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| 摘 要： | 采用硫自养反硝化工艺处理模拟污水厂二沉尾水,分别以硫磺/白云石、黄铁矿/白云石为填料,考察不同填料下生物滤池的脱氮除磷效果.结果表明,在HRT(水力停留时间)为1 h的条件下,硫磺/白云石反应器在10 d内能迅速启动,出水ρ(NO3--N)小于1.00 mg/L,去除率高达99%,反应器的最佳实际HRT为45 min.进水中的DO对硫磺/白云石反应器反硝化效果没有明显影响,但会对黄铁矿/白云石反应器的反硝化效果产生影响.去除进水中的DO后,在HRT为4 d下,黄铁矿/白云石反应器出水NO3--N和TP的质量浓度分别为10.31和0.10 mg/L,其去除率分别为67.2%和90.7%.采用高速水流反冲洗后,两个反应器的脱氮效果均能在2 d内迅速恢复.在12 ℃的低温条件下,硫磺/白云石和黄铁矿/白云石反应器的处理效果均变化不大.去除一定量的NO3--N时,硫磺/白云石反应器的SO42-生成量与理论值相符合,黄铁矿/白云石反应器的略高于理论值.研究显示,硫磺/白云石体系可有效去除二沉尾水中的NO3--N,而黄铁矿/白云石体系具有同时脱氮除磷的功能.
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| 关 键 词： | 硫自养反硝化 硫磺/白云石 黄铁矿/白云石 二沉尾水 脱氮除磷 反冲洗 |
| 收稿时间： | 2016/6/2 0:00:00 |
| 修稿时间： | 2016/7/4 0:00:00 |
Enhanced Treatment of Secondary Effluent via Autotrophic Denitrification Biofilter Process Using Sulfur and Pyrite as Fillings |
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| LI Fangfang,SHI Chunhong,ZHOU Beihai and LI Haibo.Enhanced Treatment of Secondary Effluent via Autotrophic Denitrification Biofilter Process Using Sulfur and Pyrite as Fillings[J].Research of Environmental Sciences,2016,29(11):1693-1700. |
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| Authors: | LI Fangfang SHI Chunhong ZHOU Beihai and LI Haibo |
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| Affiliation: | 1.College of Civil and Environmental Engineering, Beijing University of Science and Technology, Beijing 100083, China ;Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing 100083, China2.College of Civil and Environmental Engineering, Beijing University of Science and Technology, Beijing 100083, China |
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| Abstract: | A sulfur-based autotrophic denitrification process was applied to treat the synthetic secondary effluent of a wastewater treatment plant. Sulfur/dolomite and pyrite/dolomitewere respectively usedas fillings to investigate the nutrientsremoval performance.Under the hydraulic retention time(HRT) of 1 h, the sulfur/dolomite reactor started up quickly within ten days, which resulted in the effluent concentrations of NO3--N being less than 1.00 mg/L, representing above 99% nitrate removal. Meanwhile, the optimal HRT of the sulfur/dolomite system was 45 min. The dissolved oxygen(DO) in the influent could not affect the denitrification performance of the sulfur/dolomite reactor, but it could affect the performance of the pyrite/dolomite reactor. After removing the DO in the influent, the NO3--N and TP effluent concentrations in the pyrite/dolomite reactor were 10.31 and 0.10 mg/L under the HRT of 4 d, with the corresponding removal rates of 67.2% and 90.7%, respectively. Using high speed water flow backwashing, nitrogen removal efficiency in the two reactors could be restored quickly in two days. At the low temperature of 12 ℃, the removal performances of the two reactionsystems were not sensitive to temperature. The production of sulfate in the sulfur/dolomite reactor wasin accordance with the theoretical value, but it was slightly higher than the theoretical value in the pyrite/dolomite reactor. The results showed that the sulfur/dolomite system could effectively remove nitrate in the secondary effluent, and the pyrite/dolomite system could simultaneously remove nitrate and phosphorus. |
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