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6mg·L^(-1)时,氨氮氧化速率最低.
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 effieiencies 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~C to 35~C , the color removal efficiency improved by 141.2%. When the concentration of COD increased from 200 mg.L-l to 800 mg.L-~ at 25~C , the color removal efficiency improved by 208.9o/o. 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-~, the ammonia oxidation was the slowest.
作者
顾梦琪
尹启东
刘爱科
吴光学
GU Meng-qi;YIN Qi-dong;LIU Ai-ke;WU Guang-xue(Key Laboratory of Microorganism Application and Risk Control（MARC）of Shenzhen,Graduate Sehool at Shenzhen,Tsinghua University,Shenzhen 518055,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2018年第12期5550-5557,共8页
Environmental Science
基金
国家水体污染控制与治理科技重大专项(2017ZX07205-01)
深圳市科技创新委员会战略性新兴产业和未来产业基础研究学科布局项目(JCYJ20170817161106801)
关键词
水解酸化
缺氧/好氧
色度
硝化抑制
印染废水
hydrolysis/acidification
anoxic/aerobic
color
nitrification inhibition
dyeing wastewater
