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不同pH条件下剩余污泥厌氧发酵过程中溶出物的释放

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吕景花, 李婉婷, 万芸菲, 王建信, 李云蓓, 姜继韶. 不同pH条件下剩余污泥厌氧发酵过程中溶出物的释放[J]. 环境工程学报, 2019, 13(6): 1400-1409. doi: 10.12030/j.cjee.201811171
引用本文: 吕景花, 李婉婷, 万芸菲, 王建信, 李云蓓, 姜继韶. 不同pH条件下剩余污泥厌氧发酵过程中溶出物的释放[J]. 环境工程学报, 2019, 13(6): 1400-1409. doi: 10.12030/j.cjee.201811171
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LYU Jinghua, LI Wanting, WAN Yunfei, WANG Jianxin, LI Yunbei, JIANG Jishao. Dissolution substrate release during anaerobic fermentation of excess sludge at different pHs[J]. Chinese Journal of Environmental Engineering, 2019, 13(6): 1400-1409. doi: 10.12030/j.cjee.201811171
Citation: LYU Jinghua, LI Wanting, WAN Yunfei, WANG Jianxin, LI Yunbei, JIANG Jishao. Dissolution substrate release during anaerobic fermentation of excess sludge at different pHs[J]. Chinese Journal of Environmental Engineering, 2019, 13(6): 1400-1409. doi: 10.12030/j.cjee.201811171
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不同pH条件下剩余污泥厌氧发酵过程中溶出物的释放

  • 1.

    河南师范大学环境学院，新乡 453007

  • 2.

    黄淮水环境与污染防治教育部重点实验室，新乡 453007

  • 3.

    河南省环境污染控制重点实验室，新乡 453007

  • 4.

    河南师范大学电子与电气工程学院，新乡 453007

  • 基金项目:

    河南省高等学校重点科研项目17B610006，16A560022

    河南师范大学博士科研启动课题项目5101219170113

    河南师范大学青年科学基金资助项目2016QK18河南省高等学校重点科研项目(17B610006，16A560022)

    河南师范大学博士科研启动课题项目(5101219170113)

    河南师范大学青年科学基金资助项目(2016QK18)

Dissolution substrate release during anaerobic fermentation of excess sludge at different pHs

  • 1.

    School of Environment, Henan Normal University, Xinxiang 453007, China

  • 2.

    Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Xinxiang 453007, China

  • 3.

    Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, China

  • 4.

    College of Electronic and Electrical Engineering, Henan Normal University, Xinxiang 453007, China

  • Fund Project:

  • 摘要: 对剩余污泥进行厌氧发酵处理可实现污泥中有机质和磷的释放并最终回收利用，而pH是影响厌氧发酵过程的重要因子。为研究pH对厌氧发酵中磷与有机物释放的影响，采用批次实验研究了pH分别为3、5、7、9、10、11时剩余污泥厌氧发酵过程中磷和有机物的释放与转化规律。结果表明，在不同pH下，剩余污泥厌氧发酵过程中发生着有机物与不同形态磷的迁移与转化，酸性和碱性环境下的厌氧发酵液成分的三维荧光结构不同。剩余污泥厌氧发酵过程中，泥相钙结合态磷(AP)在酸性条件下转化为液相磷，有机磷(OP)和大部分铁/铝结合态磷(NAIP)在碱性条件下转化为液相磷；其中, pH为11时，污泥发酵液中磷含量最高。污泥发酵类型为丁酸型发酵，发酵产物以异丁酸为主，其次是正戊酸和乙酸。pH为10时，发酵液中的蛋白质与多糖的总量、挥发性有机酸(VFAs)浓度最高，两者呈现正相关关系；类蛋白和类腐殖酸降解，利于VFAs的积累。
    Abstract: Excess sludge is an important by-product of activated sludge process, which is rich in carbon, nitrogen, phosphorus and other resources. During its anaerobic fermentation treatment, the organic matters and phosphorus can be dissolved and released into the fermentation liquid for recycling, and pH is an important factor for this process. Static batch test was conducted to investigate the effect of pH (3, 5, 7, 9, 10 and 11) on the release and transformation of phosphorus and organic matters. The results showed that migration and transformation of organics and phosphorus speciation occurred at different pHs, the 3-D fluorescence structures of anaerobic fermentation compositions at acidic pHs were different from those at alkaline pHs. During the anaerobic fermentation process, apatite phosphorus (AP) in mud phase could be converted to liquid phosphorus under acidic conditions, while under alkaline conditions, organic phosphorus (OP) and most of none-apatite inorganic phosphorus (NAIP) could be converted to liquid phosphorus. At pH 11, the highest phosphorus concentration occurred in fermentation liquid, the sludge fermentation was a butyric acid-type one, and the main products were iso-butyric acid followed by n-valeric acid and acetic acid. At pH 10, fermentation liquid contained the highest total amount of protein and polysaccharides, and the highest concentration of volatile organic acids (VFAs), and a positive correlation was observed between them. The degradation of protein-like and humic acid-like matters was benefit for VFAs accumulation.
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  • 刊出日期:  2019-06-18

不同pH条件下剩余污泥厌氧发酵过程中溶出物的释放

  • 1. 河南师范大学环境学院，新乡 453007
  • 2. 黄淮水环境与污染防治教育部重点实验室，新乡 453007
  • 3. 河南省环境污染控制重点实验室，新乡 453007
  • 4. 河南师范大学电子与电气工程学院，新乡 453007
基金项目:

河南省高等学校重点科研项目17B610006，16A560022

河南师范大学博士科研启动课题项目5101219170113

河南师范大学青年科学基金资助项目2016QK18河南省高等学校重点科研项目(17B610006，16A560022)

河南师范大学博士科研启动课题项目(5101219170113)

河南师范大学青年科学基金资助项目(2016QK18)

摘要: 对剩余污泥进行厌氧发酵处理可实现污泥中有机质和磷的释放并最终回收利用，而pH是影响厌氧发酵过程的重要因子。为研究pH对厌氧发酵中磷与有机物释放的影响，采用批次实验研究了pH分别为3、5、7、9、10、11时剩余污泥厌氧发酵过程中磷和有机物的释放与转化规律。结果表明，在不同pH下，剩余污泥厌氧发酵过程中发生着有机物与不同形态磷的迁移与转化，酸性和碱性环境下的厌氧发酵液成分的三维荧光结构不同。剩余污泥厌氧发酵过程中，泥相钙结合态磷(AP)在酸性条件下转化为液相磷，有机磷(OP)和大部分铁/铝结合态磷(NAIP)在碱性条件下转化为液相磷；其中, pH为11时，污泥发酵液中磷含量最高。污泥发酵类型为丁酸型发酵，发酵产物以异丁酸为主，其次是正戊酸和乙酸。pH为10时，发酵液中的蛋白质与多糖的总量、挥发性有机酸(VFAs)浓度最高，两者呈现正相关关系；类蛋白和类腐殖酸降解，利于VFAs的积累。

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