低温对亚硝化颗粒污泥系统的影响特性

包毅; 宋家俊; 阴方芳; 张媛柯; 田文理; 李新卉; 杨晨琦; 刘文如; 沈耀良

doi:10.13205/j.hjgc.202012006

低温对亚硝化颗粒污泥系统的影响特性

doi: 10.13205/j.hjgc.202012006

包毅¹,
宋家俊¹,
阴方芳²,
张媛柯¹,
田文理¹,
李新卉¹,
杨晨琦¹,
刘文如^1,3,4, ,,
沈耀良^1,3,4

1. 苏州科技大学环境科学与工程学院, 江苏苏州 215009;
2. 苏州净研环境科技有限公司, 江苏苏州 215009;
3. 城市生活污水资源化利用技术国家地方联合工程实验室, 江苏苏州 215009;
4. 江苏省水处理技术与材料协同创新中心, 江苏苏州 215009

基金项目:

国家自然科学基金项目（51808367，51578353）；江苏省高等学校自然科学研究项目（18KJD610003）；城市生活污水资源化利用技术国家地方联合工程实验室开放课题项目（2018KF05）；苏州市科技计划项目（SS201834）。

详细信息

作者简介:
包毅(2000-),男,本科,主要研究方向为污水生物处理理论与技术。1309006007@qq.com

通讯作者:
刘文如(1987-),男,博士,讲师,主要研究方向为污水生物处理与资源化理论与技术。liuwenru1987@126.com

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- 被引次数: 0
出版历程
- 收稿日期: 2020-02-28
- 网络出版日期: 2021-04-23

EFFECTS OF LOW TEMPERATURE ON PARTIAL NITRIFICATION GRANULAR SYSTEM

1. School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China;
2. Suzhou Jing Yan Environmental Protection Technology Co., Ltd, Suzhou 215009, China;
3. National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou 215009, China;
4. Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou 215009, China

摘要

摘要: 考察了温度变化对亚硝化颗粒污泥反应器的长期和短期影响特性，结果表明：在进水ρ（NH₄⁺-N）为（35.8±5.2）mg/L、水力停留时间为2.0 h以及运行温度为7~17℃的条件下，反应器保持着95%的亚硝化率和0.18~0.25 kg/（m³·L）的NH₄⁺-N去除负荷；反应器中较低的ρ（DO）∶ρ（NH₄⁺-N）（<0.25）是实现亚硝酸盐氧化细菌（NOB）有效抑制的关键因素；长期低温运行造成颗粒污泥比NH₄⁺-N氧化速率（SAOR）从（237±14）g/（g·d）下降至（93±11）g/（g·d），但颗粒污泥中氨氧化细菌（AOB）的活化率（实际SAOR与最大SAOR之比）从48%升至约85%。批式实验结果表明，在7.1~28℃的短时温度变化内，亚硝化颗粒污泥NH₄⁺-N氧化反应的温度系数（θ）和活化能（E_a）分别为1.042~1.063，29.7~41.9 kJ/mol，均显著低于同等条件下絮体污泥的数值，表明颗粒污泥AOB比絮体污泥AOB具有更好的抗温度冲击能力。该研究结果可为基于颗粒污泥的高效城市污水亚硝化技术提供参考。
- 颗粒污泥 /
- 亚硝化 /
- 低温 /
- 活化能
Abstract: The long-and short-term effects of temperature change on partial nitrification granules was investigated. The results showed that nitrite accumulation efficiency and ammonium removal loading rates of the granular reactor were stably maintained at above 95% and 0.18~0.25 kg/(m³·L), when treating the influent of (35.8±5.2) mg/L with hydraulic retention time of 2.0 h at 7~17 ℃. The low DO/NH₄⁺-N ratio (<0.25) caused the efficient nitrite oxidizing bacteria (NOB) repression in the granular reactor. Though the lowering temperature caused the decrease of specific ammonia oxidation rates (SAOR) of partial nitrification granules from (237±14) g/(g·d) (at 17 ℃) to (93±11) g/(g·d) (at 8 ℃), the active AOB ratio (the ratio between actual SAOR and maximal SAOR of granules) increased from 48% to 85%. Batch tests results indicated that the temperature coefficient (θ) and activation energy (E_a) of the ammonia oxidizing bacteria (AOB) living in the granules was around 1.042~1.063, 29.7~41.9 kJ/mol respectively from 7.1 ℃ to 28 ℃, which were lower than that reported in flocculent sludge systems. These results suggested that the AOB living in the granules were less influenced by low temperatures than that living in the flocs. The research could provide practical support for the development of high-rate nitritation technology for municipal wastewater treatment with granular sludge.
- granular sludge /
- nitritation /
- temperature effect /
- activation energy

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