促脱剂协同传统吹脱法处理高氨氮工业废水
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摘要
在中试吹脱装置上,通过投加低浓度促脱剂协同传统吹脱法处理高氨氮工业废水(氨氮质量浓度2 369～3 600 mg/L)。结果表明:在相同处理条件下,阴离子促脱剂的氨氮去除效果优于阳离子促脱剂,且促脱剂的碳数越高越有利于氨氮的去除;废水处理的最佳工艺条件为废水pH 12.0、废水温度50℃、吹脱时间5 h、促脱剂投加量25 mg/L、气液比600∶1;该条件下,以木质素磺酸钠为促脱剂协同吹脱法处理高氨氮废水,氨氮去除率可达99%以上,高于传统吹脱法20个百分点以上。
The industrial wastewater with high ammonia-nitrogen( mass concentration 2 369-3 600 mg/L)was treated by conventional stripping process combined with low concentration promoting removal agents in a pilot stripping plant.The results showed that:Under the same operating conditions,the ammonia-nitrogen removal effect with anion promoting removal agent was better than that with cation promoting removal agent,and the more carbon numbers of the promoting removal agent made for ammonia nitrogen removal;The optimum conditions for wastewater treatment were pH 12.0,temperature 50 ℃,stripping time 5 h,promoting removal agent amount 25 mg/L and gas-liquid ratio 600∶1;When sodium ligninsulfonate was used as promoting removal agent to treat the high ammonia-nitrogen wastewater by stripping process under these conditions,the removal rate of ammonia nitrogen was above 99%,which was more than 20 percentage points higher than that by the conventional stripping process.
The industrial wastewater with high ammonia-nitrogen( mass concentration 2 369-3 600 mg/L)was treated by conventional stripping process combined with low concentration promoting removal agents in a pilot stripping plant.The results showed that:Under the same operating conditions,the ammonia-nitrogen removal effect with anion promoting removal agent was better than that with cation promoting removal agent,and the more carbon numbers of the promoting removal agent made for ammonia nitrogen removal;The optimum conditions for wastewater treatment were pH 12.0,temperature 50 ℃,stripping time 5 h,promoting removal agent amount 25 mg/L and gas-liquid ratio 600∶1;When sodium ligninsulfonate was used as promoting removal agent to treat the high ammonia-nitrogen wastewater by stripping process under these conditions,the removal rate of ammonia nitrogen was above 99%,which was more than 20 percentage points higher than that by the conventional stripping process.
引文
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[2]刘铁军.表面活性剂对高浓度氨氮废水缓冲体系中氨氮迁移影响的研究[D].武汉:武汉科技大学,2012.
[3]张乐红,周康根,陈泉洲.过饱和吹脱塔处理铍冶炼高浓度氨氮废水的工程实践研究[J].湖南有色金属,2016,32(3):65-68.
[4]于潘芬,张宾,于晓,等.混凝—热固化联合空气吹脱法处理高浓度水性油墨废水[J].化工环保,2018,38(1):62-66.
[5]彭艳春.表面活性剂复配体系浮选处理含铜废水的研究[D].长沙:湖南大学,2008.
[6]王晶,张剑,张越.表面活性剂界面吸附的研究[J].中国洗涤用品工业,2016(4):55-64.
[7]国家环境保护总局《水和废水监测分析方法》编委会.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]雷春生,朱晓锋,高雯,等.复配表面活性剂协同促进氨氮吹脱效能研究[J].中国给水排水,2016,32(5):77-80.
[9]涂阳辉.高氨氮制药废水处理工艺案例的研究[D].南昌:南昌大学,2016.
[10]KALYAKIN A,VOLKOV A,VYLKOV A,etal.Anelectrochemicalmethodforthedeterminationof concentration and diffusion coef?cient of ammonianitrogen gas mixtures[J]. J Electroanal Chem,2018,808:133-136.
[11]雷春生,马建锋,李定龙,等.复合脱氮剂-吹脱法处理高浓度氨氮废水试验研究[J].科学通报,2009,54(22):3565-3569.
[12]PROVOLO G,PERAZZOLO F,MATTACHINI G,etal.Nitrogenremovalfromdigestedslurriesusing asimplifiedammoniastrippingtechnique[J]. Waste Manage,2017,69:154-161.