Industrial Water Treatment ›› 2019, Vol. 39 ›› Issue (5): 42-45. doi: 10.11894/iwt.2018-0531

• Research and Experiment • Previous Articles     Next Articles

Potential study on the nitrogen removal by denitrification in wastewater by adding the anaerobic fermentation liquid of the straw as an external carbon source

Hulin Huang1,2(),Xinmei Fu1,2,*(),Zheng Zhou3   

  1. 1. School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China
    2. Sichuan International Science and Technology Cooperation Base of Low-cost Wastewater Treatment Technology, Mianyang 621010, China
    3. Key Laboratory of Energy Microbiology, Biogas Scientific Research Institute of the Ministry of Agriculture, Chengdu 610041, China
  • Received:2019-04-01 Online:2019-05-20 Published:2019-08-07
  • Contact: Xinmei Fu E-mail:huanghulin93@foxmail.com;fuxinmei68@163.com
  • Supported by:
    国家自然科学基金项目(21777143);四川省人社厅留学回国人员科技活动项目资助(14zd3128)

秸秆发酵液作污水反硝化脱氮外加碳源的潜能研究

黄胡林1,2(),付新梅1,2,*(),周正3   

  1. 1. 西南科技大学环境与资源学院, 四川绵阳 621010
    2. 四川省低成本废水处理技术国际科技合作基地, 四川绵阳 621010
    3. 农业部沼气科学研究所能源微生物重点开放实验室, 四川成都 610041
  • 通讯作者: 付新梅 E-mail:huanghulin93@foxmail.com;fuxinmei68@163.com
  • 作者简介:黄胡林(1993-),硕士。E-mail:huanghulin93@foxmail.com
  • 基金资助:
    国家自然科学基金项目(21777143);四川省人社厅留学回国人员科技活动项目资助(14zd3128)

Abstract:

In order to solve the problem of insufficient carbon source in sewage treatment, anaerobic fermentation of rice straw and corn stalk were carried out at 25, 35, 55℃ and the denitrification efficiency in water was investigated by adding the fermentation liquid as an external carbon source according to COD/TN ratios of 4, 6, 8 respectively. The results showed that the optimum fermentation temperature of rice straw and corn stalk were both at 35℃. The optimum amounts of the two straws fermentation liquid added were both at COD/TN of 6. The removal rates of nitrate nitrogen for rice straw and corn stalk were 80.1% and 97.3%, respectively. In summary, the fermentation liquid of straws is an excellent external carbon source candidate.

Key words: external carbon source, agricultural straw, fermentation liquid, denitrification

摘要:

为解决污水处理中碳源不足的问题,采用稻草、玉米秸秆在25、35、55℃下厌氧发酵,以COD/TN分别为4、6、8添加发酵液作外加碳源,探讨其反硝化脱氮效果。结果表明:稻草、玉米秸秆发酵的最佳温度均为35℃;稻草、玉米秸秆发酵液的碳源投加量均在COD/TN为6时脱氮率最佳,分别为80.1%、97.3%。综上所述,秸秆发酵液是一种有潜能的优质碳源。

关键词: 外加碳源, 农业秸秆, 发酵液, 反硝化

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