| 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 |
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| 引用本文： | 昌盛,刘枫. 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[J]. 化工学报, 2015, 66(12): 5111-5118. DOI: 10.11949/j.issn.0438-1157.20150854 |
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| 作者姓名： | 昌盛 刘枫 |
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| 作者单位： | 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 |
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| 基金项目： | 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)。 |
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| 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。
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| 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 |
| 收稿时间： | 2015-06-08 |
| 修稿时间： | 2015-09-23 |
Comparison of impact of influent substrate concentration on fermentative hydrogen production by ethanol-type and butyric-type fermentation |
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| CHANG Sheng,LIU Feng. Comparison of impact of influent substrate concentration on fermentative hydrogen production by ethanol-type and butyric-type fermentation[J]. Journal of Chemical Industry and Engineering(China), 2015, 66(12): 5111-5118. DOI: 10.11949/j.issn.0438-1157.20150854 |
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| Authors: | CHANG Sheng LIU Feng |
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| Affiliation: | 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 |
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| 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. |
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| Keywords: | anaerobic contact reactor (ACR) influent substrate concentration chemical oxygen demanding (COD) fermentative hydrogen production fermentation type |
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