| 水解酸化/AO组合工艺处理印染废水色度去除与脱氮性能 |
| 摘要点击 1509 全文点击 651 投稿时间：2018-04-05 修订日期：2018-06-11 |
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| 中文关键词 水解酸化 缺氧/好氧 色度 硝化抑制 印染废水 |
| 英文关键词 hydrolysis/acidification anoxic/aerobic color nitrification inhibition dyeing wastewater |
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| 中文摘要 |
| 偶氮染料是一种具有稳定化学结构的活性染料，排放至环境中会损害人体健康和影响水生生物生长.利用水解酸化/AO组合工艺处理含偶氮染料活性艳红X-3B（RR2）的印染废水，重点考察了色度去除和脱氮性能.组合工艺可有效去除色度、化学需氧量（COD）和氨氮，去除率分别为71.0%、92.2%和83.5%.水解酸化反应器中主要偶氮染料降解菌为Desulfovibrio；AO反应器中硝化菌主要为Nitrospira，反硝化菌为Thauera和Dechloromonas.水解酸化温度从25℃提高至35℃，色度去除率提高141.2%；25℃时COD浓度从200 mg·L-1提高至800 mg·L-1，色度去除率提高208.9%.AO反应器出现亚硝酸盐积累现象，亚硝化率为73.8%.染料RR2对硝化没有抑制作用，而苯胺会抑制硝化；当苯胺浓度超过6 mg·L-1时，氨氮氧化速率最低. |
| 英文摘要 |
| Azo dye is a type of reactive dyes with a stable structure. Its discharge into the environment affects the human health and growth of aquatic organisms. The color and nitrogen removal through an integrated hydrolysis/acidification and anoxic/aerobic (AO) process for the treatment of wastewater containing reactive red 2 (RR2) was investigated. The color, chemical oxygen demand (COD), and ammonia nitrogen were removed efficiently, with removal efficiencies of 71.0%, 92.2%, and 83.5%, respectively. The dominant azo dye degradation bacterium in the hydrolysis/acidification reactor was Desulfovibrio. The dominant nitrifying bacterium in the AO reactor was Nitrospira, while the denitrifying bacteria were Thauera and Dechloromonas. When increasing the hydrolysis/acidification temperature from 25℃ to 35℃, the color removal efficiency improved by 141.2%. When the concentration of COD increased from 200 mg·L-1 to 800 mg·L-1 at 25℃, the color removal efficiency improved by 208.9%. Nitrite accumulation occurred in the AO reactor with a nitritation efficiency of 73.8%. The RR2 did not inhibit the nitrification, while aniline inhibited the nitrification. At an aniline concentration of 6 mg·L-1, the ammonia oxidation was the slowest. |
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