缺氧生物膜法处理光伏高硝态氮废水研究

doi:10.16088/j.issn.1001-6600.2021070901

摘要/Abstract

摘要： 针对光伏废水中含有的高浓度硝态氮(高于600 mg/L),采用连续流生物膜法对污水进行反硝化处理,并设置连续流活性污泥法作为对比;优化连续流反硝化的运行工况,研究不同碳氮质量比(分别为3∶1、3.5∶1和4∶1)和水力停留时间(8、10和12 h)对于反硝化的影响;考察进水硝态氮浓度对反硝化的影响。结果表明:通过连续流反硝化方式降解高浓度硝态氮废水的最佳运行工况是碳氮质量比为3.5∶1、水力停留时间为12 h,降解进水硝态氮浓度为600、1 200和1 500 mg/L的废水总氮去除率分别达到96.69%、92.95%和90.93%;与连续流活性污泥法相比,连续流生物膜法对于处理高硝态氮废水有着更高的总氮去除率和更低的亚硝态氮积累率,为优化处理含高浓度硝态氮光伏废水提供基础性数据。

关键词: 高硝态氮, 光伏废水, 生物膜法, 活性污泥法, 连续流, 最佳工况

Abstract: In view of the high concentration of nitrate nitrogen (higher than 600 mg/L) contained in photovoltaic wastewater, continuous flow biofilm method was used for denitrification of wastewater, and continuous flow activated sludge method was set as a comparison. Firstly, the operating conditions of continuous flow denitrification were optimized. The effects of different carbon nitrogen ratios (3∶1, 3.5∶1 and 4∶1) on denitrification were studied by adjusting the carbon source, and the hydraulic retention time (8 h, 10 h and 12 h) of continuous flow was changed to find a sufficient effective reaction time. The ratio of carbon to nitrogen and hydraulic retention time were kept, and the influent nitrate concentration was gradually increased under the optimal operating conditions. The results showed that the best operating conditions of continuous flow denitrification were C/N ratio of 3.5 and HRT of 12 hours. Under this operating condition, the total nitrogen removal rate of wastewater with influent nitrate concentration of 600 mg/L, 1 200 mg/L and 1 500 mg/L reached 96.69%, 92.95% and 90.93%, respectively. The experiment showed that compared with continuous flow activated sludge process, continuous flow biofilm process had higher total nitrogen removal rate and lower nitrite nitrogen accumulation rate for the treatment of wastewater with high nitrate concentration, which can provide not only reference for the optimization of high concentration wastewater treatment, but also basic data for the operation of photovoltaic wastewater with high concentration of nitrate nitrogen in the future.

Key words: high nitrate nitrogen, photovoltaic wastewater, biofilm process, activated sludge process, continuous flow, best working condition

中图分类号:

X703.1

魏世勋, 何成达, 张淼. 缺氧生物膜法处理光伏高硝态氮废水研究[J]. 广西师范大学学报（自然科学版）, 2022, 40(2): 182-190.

WEI Shixun, HE Chengda, ZHANG Miao. Treatment of Photovoltaic High Nitrate Wastewater by Anoxic Biofilm Process[J]. Journal of Guangxi Normal University(Natural Science Edition), 2022, 40(2): 182-190.

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