工业水处理 ›› 2022, Vol. 42 ›› Issue (4): 89-95. doi: 10.19965/j.cnki.iwt.2021-1100

• 试验研究 • 上一篇    下一篇

预处理对头孢制药废水的降解效果与有机物去除研究

郭昌梓1, 张进勇1, 余沛2, 武毅1   

  1. 1. 陕西科技大学环境科学与工程学院, 陕西 西安 710021
    2. 陕西环保集团水环境有限公司, 陕西 西安 710021
  • 收稿日期:2022-02-03 出版日期:2022-04-20 发布日期:2022-06-07
  • 作者简介:

    郭昌梓(1968— ),副教授,博士,E‑mail:guochangzi@163.com。

  • 基金资助:
    国家科技重大专项项目(2017ZX07602-001); 陕西科技大学大学生创新创业训练计划项目(014)

Study on degradation effect of pretreatment to cephalosporin pharmaceutical wastewater and removal of organic matter

Changzi GUO1, Jinyong ZHANG1, Pei YU2, Yi WU1   

  1. 1. School of Environmental Science and Engineering,Shaanxi University of Science & Technology,Xi’an 710021,China
    2. Water Environment Co. ,Ltd. ,Shaanxi Environmental Protection Group,Xi’an 710021,China
  • Received:2022-02-03 Online:2022-04-20 Published:2022-06-07

摘要:

某制药厂生产头孢类产品,产生的废水具有COD高、残存有机物多且难生物降解等特点。探讨了臭氧氧化、铁碳微电解和Fenton氧化3种预处理方法对废水COD、B/C、有机物去除效果的影响。结果表明:臭氧氧化、铁碳微电解和Fenton氧化对COD的去除率分别为51.97%、33.61%、30.18%,废水的B/C从0.14分别提高至0.30、0.28、0.24。其中臭氧氧化对废水的处理效果最好,铁碳微电解和Fenton氧化次之。预处理过程去除废水中的COD主要是通过曝气吹脱减少挥发性有机物,氧化或还原有机物去除的COD相对较少。头孢制药废水中含有多种共轭双键、羧基、羰基及酯类官能团的大分子有机物,同时含有大量腐殖酸、木质素磺酸及其衍生物,腐殖化程度较高。曝气吹脱对易挥发有机物有较好的去除作用,但对其他不易挥发的大分子物质及腐殖质基本无去除效果。臭氧氧化和铁碳微电解对大分子有机物有较好的降解效果,而Fenton氧化对大分子有机物的去除率相对较差,对小分子有机物有很好的去除效果。对于腐殖质的去除,铁碳微电解优于臭氧氧化,Fenton氧化的处理效果不佳。

关键词: 头孢废水, 预处理, 臭氧氧化, 铁碳微电解, Fenton氧化

Abstract:

A pharmaceutical plant produces cephalosporin products and the discharged wastewater is characterized by high COD, high residual organic matter and difficult biodegradation. The effects of three pretreatment methods, ozonation, iron-carbon micro-electrolysis and Fenton oxidation, on the removal of COD, B/C and removal of organic matter from wastewater were investigated. The results showed that the COD removal rate by ozonation, iron-carbon micro-electrolysis and Fenton oxidation were 51.97%, 33.61% and 30.18%, respectively, and B/C of wastewater increased from 0.14 to 0.30, 0.28 and 0.24, respectively. Ozonation had the best effect on wastewater treatment, followed by iron-carbon micro-electrolysis and Fenton oxidation. The pretreatment removed COD from wastewater by reducing volatile organic compounds through aeration, and relatively less COD was removed by oxidation or reduction of organic compounds. Cephalosporin pharmaceutical wastewater contains a variety of macromoleculars with conjugated double bonds, carboxyl groups, carbonyl groups and lipid functional groups, while containing a large number of humic acids, lignin sulfonic acid and its derivatives, the degree of humification is high. Aeration had a good removal effect on volatile organic matter, but had no removal effect on other non-volatile macromolecules and humus. Ozonation and iron-carbon micro-electrolysis have good degradation effect on macromolecular organic matter. Fenton oxidation had relatively poor removal effect on macromolecular organic matter, and had good removal effect on small molecule organic matter. For humus removal, iron-carbon micro-electrolysis was superior to ozonation, while Fenton oxidation was not as effective.

Key words: cephalosporin wastewater, pretreatment, ozonation, iron-carbon micro-electrolysis, Fenton oxidation

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