ABS树脂废水生物处理工艺脱氮效果的强化
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摘要
为进一步提高ABS树脂废水生物处理工艺的脱氮效果,对原缺氧区的设备进行改进和优化。针对原有工艺缺氧区溶解氧含量较高,系统脱氮效果不佳等问题,设计了在缺氧区放置两台水力循环搅拌器以及投加碳源的实验方案。对比分析了微孔曝气头微曝气、水力循环搅拌器循环以及投加碳源等3种情况的脱氮效果。实验结果表明,缺氧区采用微孔曝气头微曝气,系统脱氮效果差,总氮(TN)去除率平均值为19.80%;缺氧区放置水力循环搅拌器,系统脱氮效果提高,TN去除率平均值达到41.73%;进水投加乙酸钠后,系统的脱氮效果无显著提高,而COD去除率有所下降。
In order to further enhance the total nitrogen( TN) removal efficiency of biological treatment process for ABS resin wastewater,the equipment of the original anoxic zone was improved and optimized. Aiming at the problems of the original process that the high DO value of the anoxic zone and the poor TN removal rate,an experimental scheme placing two hydraulic circulation agitators and adding external carbon substance was designed. The paper analyzed comparatively on the TN removal efficiency under the three conditions of aerating by microporous diffusers,cycling vertically by hydraulic circulation agitators and adding external carbon substance. The results indicated that when using microporous diffusers in the anoxic zone,the removal efficiency of TN was poor in the system with an average of 19. 80% TN removal rate; when placing hydraulic circulation agitators in the anoxic zone,the removal efficiency of TN had been improved with an average of41. 73%; when adding external carbon substance into the raw water,the removal efficiency of TN had not been improved significantly,while the chemical oxygen demand( COD) removal efficiency decreased.
In order to further enhance the total nitrogen( TN) removal efficiency of biological treatment process for ABS resin wastewater,the equipment of the original anoxic zone was improved and optimized. Aiming at the problems of the original process that the high DO value of the anoxic zone and the poor TN removal rate,an experimental scheme placing two hydraulic circulation agitators and adding external carbon substance was designed. The paper analyzed comparatively on the TN removal efficiency under the three conditions of aerating by microporous diffusers,cycling vertically by hydraulic circulation agitators and adding external carbon substance. The results indicated that when using microporous diffusers in the anoxic zone,the removal efficiency of TN was poor in the system with an average of 19. 80% TN removal rate; when placing hydraulic circulation agitators in the anoxic zone,the removal efficiency of TN had been improved with an average of41. 73%; when adding external carbon substance into the raw water,the removal efficiency of TN had not been improved significantly,while the chemical oxygen demand( COD) removal efficiency decreased.
引文
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[2]赵东风,刘发强,蒋文庆,等.我国ABS树脂工业废水治理技术综述[J].油气田环境保护,2003,13(2):8-10.
[3]苏宏,张晓杰,王德义,等.ABS树脂生产废水处理工程实践[J].环境工程,2004,22(4):82-92.
[4]薛慧峰,赵家林,赵旭涛,等.ABS树脂生产中废水里的有机物的定性分析[C]∥甘肃省化学会色谱专业委员会.首届中国中西部地区色谱学术交流会暨仪器展览会论文集.广州:分析测试学报,2006:63-67.
[5]王彬.ABS树脂生产工艺现状及发展趋势[J].炼油与化工,2008,19(2):11-14.
[6]王然,王彤,程家运,等.ABS树脂废水有机物反硝化潜势及降解特性[J].环境科学研究,2014,27(11):1379-1386.
[7]国家环境保护总局.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002.
[8]沈瑞建.ABS废水处理的试验研究[J].中国资源综合利用,2008,26(5):15-17.
[9]苏宏,柏承志,黄江丽,等.ABS废水处理方法的研究[J].吉林化工学院学报,2000,17(2):45-49.
[10]李亚新.活性污泥法理论与技术[M].北京:中国建筑工业出版社,2007.
[11]GE S J,PENG Y Z,WANG S Y,et al.Enhanced nutrient removal in a modified step feed process treating municipal wastewater with different inflow distribution ratios and nutrient ratios[J].Bioresource Technology,2010,101(23):9012-9019.
[12]张自杰,林荣忱,金儒霖.排水工程(下册)[M].4版.北京:中国建筑工业出版社,2000:312.
[13]赖波,周岳溪,王志刚.铁炭微电解对ABS树脂生产废水中典型特征污染物的降解[J].北京工业大学学报,2013,39(1):137-142.
[14]SATTAYATEWA C,PAGILLA K,SHARP R,et al.Fate of organic nitrogen in four biological nutrient removal wastewater treatment plants[J].Water Environment Research,2012,82(12):2306-2315.