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亚硝化颗粒污泥处理低碳高氨氮废水的影响因素

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李刚, 王建芳, 沈耀良. 亚硝化颗粒污泥处理低碳高氨氮废水的影响因素[J]. 环境工程学报, 2018, 12(3): 697-704. doi: 10.12030/j.cjee.201709051
引用本文: 李刚, 王建芳, 沈耀良. 亚硝化颗粒污泥处理低碳高氨氮废水的影响因素[J]. 环境工程学报, 2018, 12(3): 697-704. doi: 10.12030/j.cjee.201709051
shu
LI Gang, WANG Jianfang, SHEN Yaoliang. Influencing factors of nitrosation granular sludge treating wastewater with low carbon and high ammonia concentration[J]. Chinese Journal of Environmental Engineering, 2018, 12(3): 697-704. doi: 10.12030/j.cjee.201709051
Citation: LI Gang, WANG Jianfang, SHEN Yaoliang. Influencing factors of nitrosation granular sludge treating wastewater with low carbon and high ammonia concentration[J]. Chinese Journal of Environmental Engineering, 2018, 12(3): 697-704. doi: 10.12030/j.cjee.201709051
shu

亚硝化颗粒污泥处理低碳高氨氮废水的影响因素

  • 1.

    苏州科技大学环境科学与工程学院，苏州 215009

  • 2.

    江苏省环境科学与工程重点实验室，苏州 215009

  • 3.

    江苏高校水处理技术与材料协同创新中心，苏州 215009

  • 基金项目:

    国家自然科学基金资助项目（51308367，51578353）

Influencing factors of nitrosation granular sludge treating wastewater with low carbon and high ammonia concentration

  • 1.

    School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China

  • 2.

    Jiangsu Key Laboratory of Environmental Science and Engineering, Suzhou 215009, China

  • 3.

    Jiangsu High Education Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou 215009, China

  • Fund Project:

  • 摘要: 稳定的部分硝化是新型脱氮工艺处理低C/N比高氨氮废水的关键环节。在SBR中，以放置超过30 d的亚硝化颗粒污泥为接种污泥，考察反应器内快速启动亚硝化的可行性和污泥形态变化, 探讨pH和C/N比对颗粒污泥性能和氮转化的影响。结果表明，通过提高进水负荷可快速启动亚硝化反应器，氨氮去除率和亚硝酸盐累积率均在90%以上，由同步反硝化引起的氮损失为20%左右。降低进水pH至7.0，SBR周期运行最高游离氨FA浓度为5.1 mg?L-1，有利于NOB选择性抑制，提高氨氮去除率，出水NO2--N/NH4+-N比值从0.5提高到0.95左右。C/N比高于2，会引起异养微生物的快速增殖，COD去除负荷提高了1.45 kg?（m3?d）-1，AOB受显著抑制，出水NO2--N/NH4+-N由1.0降低至0.65左右，出现颗粒污泥破裂、解体。
    Abstract: Achieving stable partial nitrification is a key step in treating wastewater with low carbon/nitrogen ratio and high ammonia concentration in the new nitrogen removal process. The feasibility of fast start-up nitrosation and change of sludge morphology were studied in the reactor, inoculating nitrosation granular sludge which was stored over 30 days in SBR. The effects of pH and C/N ratio on granular performance and nitrogen compound transformation. As a result, nitrosation reactor was fast started by improving influent nitrogen loading. Over 90% of the ammonia removal and nitrite accumulation were achieved while nearly 20% total nitrogen was obtained by simultaneous denitrification. While the pH was decreased to 7.0, the concentration of free ammonia(FA) was 5.1 mg?L-1 in a SBR cycle, which was in favour of inhibiting NOB and improving ammonia removal. The ratio of NO2--N/NH4+-N was increased from 0.5 to 0.95. When the ratio of C/N in influent was over 2, heterotrophic microorganisms were augmented and the COD removal loading was increased by 1.45 kg?(m3?d)-1. Meanwhile, AOB was inhibited and the ratio of NO2--N/NH4+-N was reduced from 1.0 to 0.65 while the structure of some granular sludge was fallen apart.
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  • 刊出日期:  2018-03-22

亚硝化颗粒污泥处理低碳高氨氮废水的影响因素

  • 1. 苏州科技大学环境科学与工程学院，苏州 215009
  • 2. 江苏省环境科学与工程重点实验室，苏州 215009
  • 3. 江苏高校水处理技术与材料协同创新中心，苏州 215009
基金项目:

国家自然科学基金资助项目（51308367，51578353）

摘要: 稳定的部分硝化是新型脱氮工艺处理低C/N比高氨氮废水的关键环节。在SBR中，以放置超过30 d的亚硝化颗粒污泥为接种污泥，考察反应器内快速启动亚硝化的可行性和污泥形态变化, 探讨pH和C/N比对颗粒污泥性能和氮转化的影响。结果表明，通过提高进水负荷可快速启动亚硝化反应器，氨氮去除率和亚硝酸盐累积率均在90%以上，由同步反硝化引起的氮损失为20%左右。降低进水pH至7.0，SBR周期运行最高游离氨FA浓度为5.1 mg?L-1，有利于NOB选择性抑制，提高氨氮去除率，出水NO2--N/NH4+-N比值从0.5提高到0.95左右。C/N比高于2，会引起异养微生物的快速增殖，COD去除负荷提高了1.45 kg?（m3?d）-1，AOB受显著抑制，出水NO2--N/NH4+-N由1.0降低至0.65左右，出现颗粒污泥破裂、解体。

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