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中国农学通报 ›› 2020, Vol. 36 ›› Issue (20): 77-82.doi: 10.11924/j.issn.1000-6850.casb20190500097

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

生物活性炭流化床对生物柴油废水的降解效应与化学势变

刘子璇, 石卉(), 王平, 王沛颖, 朱健()   

  1. 中南林业科技大学环境科学与工程学院,长沙 410004
  • 收稿日期:2019-05-06 修回日期:2019-11-13 出版日期:2020-07-15 发布日期:2020-07-20
  • 通讯作者: 石卉,朱健
  • 作者简介:刘子璇,女,1996年出生,在读硕士,研究方向:重金属污染水体治理与修复。通信地址:410004 湖南省长沙市天心区韶山南路498号 中南林业科技大学,E-mail:916462199@qq.com。
  • 基金资助:
    湖南省重点研发计划项目“湿地植物基生物炭的制备、改性及其在含镉灌溉水深度处理中的应用”(2017SK2273);国家自然科学基金“外源矿物硅对镉在土壤-水稻系统迁移转化的阻控机制研究”(21707169);国家重点研发计划子课题“水-旱轮作系统镉、砷中轻度污染农田“边萃取边生产”新技术模式与效益评估”(2016YFD0800805-4)

Biological Activated Carbon Fluidized Bed: Degradation Effect and Chemical Potential Change of Bio-diesel Wastewaters

Liu Zixuan, Shi Hui(), Wang Ping, Wang Peiying, Zhu Jian()   

  1. College of Environment Science and Engineering, Central South University of Forestry and Technology, Changsha 410004
  • Received:2019-05-06 Revised:2019-11-13 Online:2020-07-15 Published:2020-07-20
  • Contact: Shi Hui,Zhu Jian

摘要:

为了解决生物柴油废水生化处理难度大、效率低等问题。采用生物活性炭流化床工艺处理生物柴油废水,研究试验系统COD的降解效应与化学势变。结果表明:试验系统具有良好的处理效果,采用四级串联系统可使末端出水COD浓度达到GB 18918—2002中一级B标准。试验系统COD去除的基本过程可用吸附-好氧生物降解两级反应来描述,好氧生物降解反应中COD的去除率随串联级数增大而增大,说明好氧降解的总贡献率与系统串联级数呈正相关。试验系统COD去除反应的化学势变为负值,其绝对值随单元级数增大而增大,说明系统COD的去除是自发反应,系统去除COD能力随串联级数增大而增强,好氧生物降解反应在维持系统处理效果稳定中发挥着重要作用。

关键词: 生物柴油废水, 活性炭, 好氧生物降解, COD, 化学势变

Abstract:

To solve the problem of difficult and low efficient biochemical treatment of bio-diesel wastewater, we treated the bio-diesel wastewater by adopting the biological activated carbon fluidized-bed process and studied the degradation effect and chemical potential change of test system COD. The results indicated that: the test system had good treatment effect, and the COD concentration of terminal effluent could meet the Standard of Level I B in GB 18918-2002 by using the four-level series system; the basic process of test system COD removal could be described by two-level reaction: adsorption-aerobic biodegradation; COD removal rate in the aerobic degradation reaction increased as the series increased, indicating that the total contribution of aerobic degradation was positively correlated with levels of system series; the chemical potential of test system COD removal reaction was a negative value and its absolute value increased as unit series increased, indicating that the system COD removal was a spontaneous reaction, the ability to remove COD was strengthened with the increase of series levels, and aerobic biodegradation played a significant role in stable treatment effect of the maintenance system.

Key words: bio-diesel wastewater, activated carbon, aerobic biodegradation, COD, chemical potential change

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