| 生物气射流内循环厌氧流化床中复杂化工有机废水的催化还原过程 |
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| 引用本文： | 韦朝海,邓志毅,周秀峰,吴超飞,韦哲. 生物气射流内循环厌氧流化床中复杂化工有机废水的催化还原过程[J]. 化工学报, 2007, 58(12): 3139-3146 |
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| 作者姓名： | 韦朝海 邓志毅 周秀峰 吴超飞 韦哲 |
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| 作者单位： | 华南理工大学环境科学与工程学院，广东 广州 510640 |
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| 基金项目： | 国家自然科学基金 , 广东省自然科学基金重点项目 , 国家高技术研究发展计划(863计划) |
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| 摘 要： | 针对集约化化工园区排放的高浓度、高色度、高时变性及难降解性复杂化工废水，自行研制了处理能力为24 m3·d-1、内置Fe0作为生物催化剂的生物气射流内循环厌氧流化床，研究了新型反应器及其工艺对该废水预处理的催化还原过程及运行参数。结果表明：以射流的方式使生物气和废水在反应器内主动循环，使催化剂、活性炭、污泥与废水之间保持良好的接触传质，通过产氢、絮凝和提供营养等方式强化厌氧反应过程。在回流比为2、环境温度为23～34℃及水力停留时间（HRT）为12～24 h的条件下，当进水容积负荷为0. 874～2. 996 kg COD·m-3·d-1和色度为250～2000倍时，其COD和色度的平均去除率分别达到26. 2%和70. 8%;出水pH稳定在6～8之间，原废水BOD/COD值由0. 26±0. 04提高到0. 43±0. 03。该新型反应器及工艺在实现部分有机负荷去除的同时明显改善了废水的可生化性，可作为复杂化工有机废水的高效预处理技术。
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| 关 键 词： | 废水处理 生物气射流内循环厌氧流化床 复杂化工有机废水 Fe0颗粒 催化还原 |
| 收稿时间： | 2007-01-26 |
| 修稿时间： | 2007-7-13 |
Catalytic deoxidation of complex chemical organic wastewater in JBILAFB |
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| WEI Chaohai,DENG Zhiyi,ZHOU Xiufeng,WU Chaofei,WEI Zhe. Catalytic deoxidation of complex chemical organic wastewater in JBILAFB[J]. Journal of Chemical Industry and Engineering(China), 2007, 58(12): 3139-3146 |
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| Authors: | WEI Chaohai DENG Zhiyi ZHOU Xiufeng WU Chaofei WEI Zhe |
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| Abstract: | The wastewater discharged from a highly-intensive chemical industrial park area has the characteristics of strong concentration, high colourity, frequent variability and difficulty of biodegradation. A novel anaerobic reactor—jet biogas inter-loop anaerobic fluidized bed (JBILAFB) was self-designed and fabricated for the pre-treatment of complex chemical organic wastewater. The designed capacity of the reactor was 24 m3·d-1. Zero-valent iron was used as biological catalyst in the reactor. During the wastewater pre-treatment, the mechanism of the catalytic deoxidation process was discussed and the technological parameter of the JBILAFB was obtained. The results showed that the active circulation of biogas and wastewater in the JBILAFB with the jet mode could maintain good contact and mass transfer of biological catalyst, active carbon, anaerobic sludge and wastewater. Anaerobic biological pre-treatment effect was enhanced with hydrogen generation, flocculating deposition and nourishment supply during the catalytic deoxidation process of zero-valent iron granules. When the volume loading rate (VLR) and influent colourity were 0. 874—2. 996 kg COD·m-3·d-1and 250—2000 times respectively, the colourity and COD average removal rate of the JBILAFB could reach about 26. 2% and 70. 8% with the recycle ratio in the JBILAFB, environmental temperature and hydraulic retain time (HRT) being 2, 23—34℃ and 12—24 h respectively. Moreover, the effluent pH was maintained at 6—8 and the average BOD/COD of wastewater increased from 0. 26±0. 04 to 0. 43±0. 03. Organic pollutant was partially removed and biodegradation of wastewater was improved obviously during the catalysis deoxidation process. The JBILAFB reactor and process offered a highly efficient technology for the pre-treatment of complex chemical organic wastewater. |
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| Keywords: | wastewater treatment jet biogas inter-loop anaerobic fluidized bed complex chemical organic wastewater zero-valent iron catalysis deoxidize |
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