化工学报 ›› 2015, Vol. 66 ›› Issue (12): 5111-5118.DOI: 10.11949/j.issn.0438-1157.20150854

• 能源和环境工程 • 上一篇    下一篇

对比分析进水基质浓度对乙醇型和丁酸型发酵制氢系统的影响

昌盛1, 刘枫2   

  1. 1 中国环境科学研究院环境基准与风险评估国家重点实验室, 北京 100012;
    2 哈尔滨工业大学市政环境工程学院, 黑龙江 哈尔滨 150090
  • 收稿日期:2015-06-08 修回日期:2015-09-23 出版日期:2015-12-05 发布日期:2015-12-05
  • 通讯作者: 昌盛
  • 基金资助:

    国家自然科学基金项目(51508539,51178316);国家水体污染控制与治理重大专项(2014ZX07405-001)。

Comparison of impact of influent substrate concentration on fermentative hydrogen production by ethanol-type and butyric-type fermentation

CHANG Sheng1, LIU Feng2   

  1. 1 State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
    2 School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China
  • Received:2015-06-08 Revised:2015-09-23 Online:2015-12-05 Published:2015-12-05
  • Supported by:

    supported by the National Natural Science Foundation of China (51508539, 51178136) and the National Major Projects of Water Pollution Control and Treatment (2014ZX07405-001).

摘要:

以糖蜜废水为基质,将两套厌氧接触式发酵制氢反应器(ACR)出水pH分别控制在4.5~5.0、5.5~6.0的水平,通过逐级提升进水COD浓度方式,系统对比分析基质浓度对乙醇型和丁酸型发酵制氢系统的影响。结果显示,对于乙醇型发酵制氢系统而言,当HRT 6 h,进水COD从5000逐步提升至12000 mg·L-1时,反应器的产氢效能逐步得到增强,但当COD进一步提升至15000 mg·L-1时,底物反馈抑制作用开始显现,因而在进水COD为12000 mg·L-1时,ACR产氢性能最佳,系统的产氢速率、污泥比产氢速率和单位基质氢气转化率分别为68.8 L·d-1、744.5 ml H2·(g VSS·d)-1、2.3 mol H2·(mol葡萄糖)-1。对于丁酸型发酵制氢系统而言,当HRT 8 h,在进水COD从5000提升至20000 mg·L-1过程中,ACR产氢效能总体呈下降趋势,在进水COD为5000 mg·L-1时,系统的污泥比产氢速率和单位基质氢气转化率最大,分别为159.6 ml H2·(g VSS·d)-1、1.0 mol H2·(mol葡萄糖)-1。研究结果表明,在进水COD为500~20000 mg·L-1的运行中,ACR乙醇型发酵系统的产氢效能优于丁酸型发酵制氢系统。

关键词: 厌氧接触式反应器, 进水基质浓度, 化学需氧量(COD), 发酵制氢, 发酵类型

Abstract:

In the present study, the anaerobic contact reactor (ACR) was used to produce hydrogen from diluted molasses by anaerobic fermentation, and an ethanol-type fermentation and butyric-type fermentation were established by keeping the effluent pH of the two reactors at 4.5-5.0 and 5.5-6.0, respectively. And then the comparison of the impact of influent substrate concentration on the performance of the above two reactors was investigated. For the ethanol-type fermentation system, the fermentative hydrogen-producing efficiency was enhanced when the influent chemical oxygen demanding (COD) was increased from 5000 to 12000 mg·L-1 under the HRT of 6 h, whereas, the feedback inhibition was turn to be functioned as the influent COD was increased to 15000 mg·L-1. It was found that the hydrogen production rate (HPR), specific hydrogen rate of sludge (SHPR) and hydrogen yield (HY) was peaked at 68.8 L·d-1, 744.5 ml H2·(g VSS·d)-1 and 2.3 mol H2·(mol glucose)-1, respectively, when the influent COD was 12000 mg·L-1. For the butyric-type fermentation system, the hydrogen producing efficiency was decreased on the whole as the influent COD was increased from 5000 to 20000 mg·L-1 under the HRT of 8 h. It also showed that the maximum value of SHPR and HY was 159.6 ml H2·(g VSS·d)-1 and 1.0 mol H2·(mol glucose)-1, respectively, when the influent COD was 5000 mg·L-1. It indicated that the hydrogen-producting capability of ethanol-type fermentation was better than that of butyric-type fermentation.

Key words: anaerobic contact reactor (ACR), influent substrate concentration, chemical oxygen demanding (COD), fermentative hydrogen production, fermentation type

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