| Pretreatment of coking wastewater using anaerobic sequencing batch reactor （ASBR） |
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| 作者姓名： | Li B Sun YL Li YY |
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| 作者单位： | Institute of Environmental Science and Engineering,Ocean University of China,Institute of Environmental Science and Engineering,Ocean University of China,Department of Chemical and Environmental Engineering,Wuyi University Qingdao 266003,China,Qingdao 266003,China,Jiangmen 529020,China |
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| 摘 要： | INTRODUCTION Coking wastewater is generated in the produc- tion of coke, coal gas, tar and other coke by-products The coking wastewater includes inorganic pollutants such as ammonia, cyanogen, sulfocyan, heterocycle compounds and polycyclic aromatic compounds such as phenol, oils, naphthalene, pyridine, quinoline and anthracites, which are difficult to biodegradation under aerobic conditions (Ganczarczyk, 1972). Dis- charge of coking wastewater to the environment may cause severe contamin…
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| 关 键 词： | 炼焦废水 ASBR 厌氧序列反应堆 废水处理 环境保护 |
| 收稿时间： | 2005-05-19 |
| 修稿时间： | 2005-08-09 |
Pretreatment of coking wastewater using anaerobic sequencing batch reactor (ASBR) |
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| Li B,Sun YL,Li YY.Pretreatment of coking wastewater using anaerobic sequencing batch reactor (ASBR)[J].Journal of Zhejiang University Science,2005,6(11):1115-1123. |
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| Authors: | Li Bing Sun Ying-lan Li Yu-ying |
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| Institution: | Institute of Environmental Science and Engineering, Ocean University of China, Qingdao 266003, China. Lilibing188@sina.com |
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| Abstract: | A laboratory-scale anaerobic sequencing batch reactor (ASBR) was used to pretreat coking wastewater. Inoculated anaerobic granular biomass was acclimated for 225 d to the coking wastewater, and then the biochemical methane potential (BMP)of the coking wastewater in the acclimated granular biomass was measured. At the same time, some fundamental technological factors, such as the filling time and the reacting time ratio (tf/tr), the mixing intensity and the intermittent mixing mode, that affect anaerobic pretreatment of coking wastewater with ASBR, were evaluated through orthogonal tests. The COD removal efficiency reached 38％～50％ in the stable operation period with the organic loading rate of 0.37～0.54 kg COD/(m3.d) at the optimum conditions of tf/tr, the mixing intensity and the intermittent mixing mode. In addition, the biodegradability of coking wastewater distinctly increased after the pretreatment using ASBR. At the end of the experiment, the microorganism forms on the granulated sludge in the ASBR were observed using SEM (scanning electron microscope) and fluoroscope. The results showed that the dominant microorganism on the granular sludge was Methanosaeta instead of Methanosarcina dominated on the inoculated sludge. |
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| Keywords: | Anaerobic sequencing batch reactor (ASBR) Coking wastewater Anaerobic pre-treatment |
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