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脉冲弧光放电等离子体水解活性污泥
Activated Sludge Hydrolysis by Pulse Arc Discharge Plasma
投稿时间:2017-09-11  修订日期:2018-02-28
DOI:
中文关键词:  脉冲弧光放电  污泥水解  营养物释放  污泥性状
英文关键词:Pulse arc discharge plasma (PADP)  Sludge hydrolysis  Nutrient release  Sludge character
基金项目:国家自然科学基金资助项目(51477025)
作者单位E-mail
曹颖 大连理工大学环境学院 429578747@qq.com 
姜楠 大连理工大学环境学院  
段丽娟 大连理工大学环境学院  
郭贺 大连理工大学环境学院  
任景俞 大连理工大学环境学院  
王璞 大连理工大学环境学院  
周集体 大连理工大学环境学院  
李杰 大连理工大学电气工程学院 lijie@dlut.edu.cn 
吴彦 大连理工大学电气工程学院  
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中文摘要:
      活性污泥水解对提高污泥的稳定性、缩短厌氧消化时间和增大甲烷产率是非常有意义的。本文研究了脉冲弧光放电等离子体(PADP)水解活性污泥方法,考察水解效果、影响因素和水解后污泥性状。实验研究结果表明:随着峰值电压、频率和电导率的增加,污泥上清液营养物质含量呈增长趋势,溶胞率(R)升高;随着放电时间的增加,R增加,氨氮物质(NH4+-N)先增加后降低,可证明NH4+-N物质降解率逐渐上升且最终高于其释放率;污泥在14 kV、25 Hz、1600 μS · cm-1条件下放电150 min,R增加到51.3 %,NH4+-N等有机物、蛋白质和多糖物质大量释放;经过PADP处理,污泥沉降性降低,絮凝体结构改变,含固量和颗粒尺寸降低,污泥生物大量死亡,水解污泥生物由光滑、完整的表面结构变得粗糙、破裂,细胞壁(膜)受损明显,污泥发生水解。
英文摘要:
      It is very significance of activated sludge hydrolysis for improving sludge stability, shortening the anaerobic digestion time and increasing methane yield. In this paper, pulsed arc discharge plasma (PADP) was utilized to investigate the hydrolysis effect, influence factor and character of hydrolyzed sludge. The results showed that higher peak voltage, frequency and conductivity enhanced sludge hydrolysis. With the increase of discharge time, lysis rate (R) increased, concentration of ammonia nitrogen (NH4+-N) increased first and then decreased, which could demonstrate that the degradation rate of NH4+-N increased gradually and it was higher than the release rate at last. R could reach approximately 51.3% under 14 kV peak voltage, 25 Hz frequency and 1 600 μS·cm-1 conductivity with 150 min treatment time. In addition, NH4+-N, protein, polysaccharide and other organic matters of sludge could release extensively. After PADP treatment, the settleability of sludge reduced, the structure of flocs changed, the content of solid and the particle size decreased, sludge biological component died in large numbers, the complete and smooth surface structure of organisms became rough and rupture, respectively. The cell wall (membrane) was damaged significantly, activated sludge was finally hydrolyzed.
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