二甲胺废水生化处理研究

本文拟采用经训化的异养微生物和自养微生物协同共生体系作为菌种,配制一定浓度的DMA水溶液作为模拟水样,研究协同共生体系对DMA降解作用。结果表明经训化异养型微生物和自养型微生物协同共生体系菌种可用于降解DMA。当原水pH在6.5-9范围内可以获得较理想的DMA降解效果,生化系统HRT需要兼顾异养细菌降解BOD的时间和自养型细菌降解NH3-N时间,适当延长停留时间可以获得较好的NH3-N去除效果。

电催化处理二甲胺废水的研究

为探索电催化工艺对有机化工废水中有机氮的去除能力并寻找出最佳工艺参数,本文对模拟有机氮废水进行电催化降解实验。以总凯氏氮(TKN)浓度为450 mg·L^(-1)的二甲胺水溶液为模拟废水,分别考察了反应时间、pH、电流密度以及Cl^-浓度对电催化去除有机氮的效果的影响。实验结果表明,当电流密度为20 mA·cm^(-2)、初始pH值为7～8时,电催化对TKN的去除效果最佳,且电催化氧化时间越长,Cl^-浓度越高,电催化氧化去除TKN效果越好。

臭氧催化氧化对含二甲胺废水处理的研究

为探索臭氧催化氧化工艺对有机化工废水中有机氮的去除能力并寻找出最佳工艺参数,本文对模拟有机氮废水进行臭氧催化氧化实验。以有机氮(ON)浓度为140 mg·L^(-1)的二甲胺水溶液为模拟废水,分别考察了反应pH、双氧水投加量对臭氧催化氧化去除有机氮效果的影响。实验结果表明,臭氧投加量4 g/L时,反应pH为8~9,双氧水投加量50%(按质量计),臭氧催化氧化对ON的去除效果最佳,且臭氧投加量越多,臭氧催化氧化去除ON效果越好。

利用现有生产设施处理二甲胺废水的新工艺

本文介绍了利用现有生产设施处理二甲胺废水的新工艺,该工艺对废水中氨氮的去除率达95%以上,可有效缓解废水处理站的压力,同时降低废水处理的成本。

Removal of Organic Matter and Ammonia Nitrogen in Azodicarbonamide Wastewater by a Combination of Power Ultrasound Radiation and Hydrogen Peroxide

A simple and efficient sonochemical method was developed for the degradation of organic matter and ammonia nitrogen in azodicarbonamide wastewater.The effects of initial pH,ultrasound format and peripheral water level on the sonolysis of hydrazine,urea,COD and ammonia nitrogen were investigated.It is found that the initial pH has a significant influence on the degradation of hydrazine and ammonia nitrogen,whereas this impact to urea is relatively small.It also shows that a noticeable enhancement of ammonia nitrogen removal could be achieved in a proper intermittent ultrasound operation mode,i.e.,1/1 min on/off mode.The height difference between the periph-eral water level and the inner water level of the flask affects the efficiency of ultrasonic treatment as well.