摘要
以邻苯二甲酸二甲酯（ＤＭＰ）为唯一碳源驯化ＤＭＰ降解菌，并将其接种到复合式完全混合反应器中以处理ＤＭＰ和葡萄糖人工配水．进水ＣＯＤ负荷约１．０ｇ／（Ｌ·ｄ），逐渐提高葡萄糖浓度（０～６００ｍ ｇ／Ｌ），同时降低ＤＭＰ浓度（３００～０ｍ ｇ／Ｌ），分别测试附着相和悬浮相菌种降解ＤＭＰ活性的变化．结果表明：反应器ＣＯＤ去除率均达９０％ 以上，葡萄糖引入后，悬浮相菌种降解ＤＭＰ比耗氧速率迅速降低，由４９．５降至４．０ｍ ｇ／（ｇ·ｈ），而附着相菌种则逐渐变化，由６４．１降至４８．０ｍ ｇ／（ｇ·ｈ）．镜检结果表明：葡萄糖引入后，悬浮相菌种中丝状菌大量出现，而附着相菌种则几乎未出现丝状菌．由此可见，在基质变化后由吸附在陶粒载体上引起的自固定化能够强化菌种的高效降解活性．
Dimethyl Phthalate(DMP)was used to cultivate dominant species and the species was introduced in a hybrid completely stirred tank reactor to treat synthetic wastewater with DMP and/or glucose as carbon source.The concentration of glucose was increased from 0 to 600mg/L,as that of DMP was decreased from 300 to 0mg/L,meanwhile N V ,COD kept about 1.0g/(L·d).During every stage,the degrading characteristics of the attached species and the suspended species for DMP was studied respectively.The results showed that more than 90% of COD was removed within whole period.After glucose was introduced,oxygen uptake rate of the suspended species to degrading DMP decreased quickly from 49.5 to 4.0mg/(g·h).While that of the attached species decreased gradually from 64.1 to 48.0mg/(g·h).Microscopic examination demostrated that filamentous bacteria appeared a lot in the suspended species,but they hardly appeared in the attached species.Thus self immobilization can effectively retain the ability of degrading refractory organic compound of dominant species.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2000年第1期32-35,共4页
Environmental Science
基金
国家自然科学基金
国家"九五"科技攻关项目
关键词
自固定化
高效菌种
有机废水
废水处理
COD
dimethyl phthalate,self immobilization,dominant species,hybrid biological reactor,priority pollutant.
