| 不同预处理对超磁分离污泥水解产酸效果的影响研究 |
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| 引用本文： | 刘越,石川,马金元,罗娟,王凯军.不同预处理对超磁分离污泥水解产酸效果的影响研究[J].中国沼气,2022(1):3-10. |
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| 作者姓名： | 刘越 石川 马金元 罗娟 王凯军 |
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| 作者单位： | 清华大学环境学院 |
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| 基金项目： | 国家科技重大专项课题(2018ZX07105003)。 |
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| 摘 要： | 超磁分离污泥是以磁絮凝反应和磁种回收为核心技术,通过超磁分离机浓缩排出的污泥.污泥具有有机质浓度高、结构紧密等特点.该研究以超磁污泥为研究对象,通过批式试验考察了NaOH,H2O2和Fe预处理后污泥水解酸化的效果以及溶解性有机物特征.结果 表明,NaOH预处理加速了污泥的水解酸化,提高了可溶性物质的含量.NaOH处理组...
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| 关 键 词： | 超磁分离污泥 预处理 水解酸化 挥发性脂肪酸 |
The Study on Influencing of Hydrolysis and Acidification of Ultra-magnetic Separation Sludge |
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| LIU Yue,SHI Chuan,MA Jin-yuan,LUO Juan,WANG Kai-jun.The Study on Influencing of Hydrolysis and Acidification of Ultra-magnetic Separation Sludge[J].China Biogas,2022(1):3-10. |
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| Authors: | LIU Yue SHI Chuan MA Jin-yuan LUO Juan WANG Kai-jun |
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| Institution: | (State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China) |
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| Abstract: | The ultra-magnetic separation sludge was the sludge thickened and discharged by ultra-magnetic separator with magnetic flocculation reaction and magnetic seed recovery as the core technology.The sludge was characterized by high concentration of organic matter and compact structure.In this study,the effect of hydrolytic and acidification of ultra-magnetic sludge after NaOH,H2O2 and Fe pretreatment and the characteristics of dissolved organic matter were investigated by batch tests.The results showed that NaOH pretreatment accelerated the hydrolytic and acidification of sludge and increased the content of dissolving organic matter compared with H2O2 and Fe pretreatment.The concentrations of SCOD,dissolved protein and dissolved carbohydrates were highest,reaching 8974.5 mg·L-1,808.3 mg·L-1,and 186.0 mg·L-1,respectively.Meanwhile,the concentration of VFAs could reach the highest value on the 6th day,at 3505.7 mg·L-1.Among them,the highest concentration of acetic acid was 2124.5 mg·L-1,accounting for 67.7%.However,the percentage of propionic acid in Fe and H2O2 treatment groups gradually increased,and the fermentation type of untreated sludge was transformed from mixed-type to propionic-type,which was not favorable for hydrolytic acidification.The release of N and P was accompanied by the acquisition of internal carbon source during the hydrolytic acidification of ultra-magnetic sludge,and the release of NH+4-N and PO3-4 was most obvious in the NaOH treatment group. |
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| Keywords: | ultramagnetic separation sludge pretreatment hydrolytic acidification volatile fatty acids |
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