好氧颗粒污泥法降解苯胺的特性

在控温摇床上采用好氧振荡的方法,在含有苯胺和硝基苯混合废水处理厂的好氧污泥中,驯化降解苯胺的混合微生物.在驯化过程中发现混合微生物逐渐形成了颗粒污泥,采用此颗粒污泥(混合微生物)进行苯胺降解的实验.结果表明,该混合微生物在以苯胺为唯一碳源和氮源的情况下,具有较强的降解苯胺的能力,且最适宜的温度为28℃,最佳的pH值为7.0,当苯胺的起始浓度为600mg/L时,此条件下在18h内被完全降解,混合微生物降解苯胺的速度达到33.6mg/(L·h).

Characteristics and biodegradation of aniline by aerobic granular sludge

Mixed microorganisms which can degrade aniline efficiently were cultured and acclimated from aerobic activated sludge of a wastewater treatment plant being used to treat aniline and nitrobenzene wastewater.In the process of acclimation,mixed microorganisms transformed into granular sludge gradually,which was used later to degrade aniline.The mixed microorganisms would degrade aniline efficiently under the optimum conditions as follows:temperature was 28℃,pH was 7.0,and aniline was the sole carbon and nitrogen source.When the initial concentration of aniline was 600mg/L,it could be degraded completely in 18h at the optimum conditions just mentioned,and the degrading velocity of aniline by mixed microorganisms reached as high as 33.6mg/(L·h).