厌氧──好氧混凝工艺处理抗生素废水

采用厌氧污泥床过滤器（１３ｍ３）内循环三相生物流化床（２．５ｍ３）处理抗生素废水的中试，当进水ＣＯＤ为１０１００～１８３００ｍｇ／Ｌ时，厌氧段去除容积负荷Ｎｖ为５．０８～９．８８ｋｇＣＯＤ／ｍ３·ｄ；好氧段Ｎｖ为４．０８～７．６０ｋｇＣＯＤ／ｍ３·ｄ；出水ＣＯＤ为３００～３５０ｍｇ／Ｌ，再经混凝沉淀处理后，最终ＣＯＤ可＜３００ｍｇ／Ｌ。

内循环三相生物流化床处理生活污水

对内循环三相生物流化床处理生活污水进行了中试研究，探讨了生物膜的形成和水力停留时间及供气量对处理效果的影响．结果表明：在气水比４：１、水力停留时间４０ｍｉｎ、进水ＣＯＤ１５０～１０００ｍｇ／Ｌ条件下，平均ＣＯＤ去除率为８９％、平均去除容积负荷为１０．４ｋｇＣＯＤ／ｍ３·ｄ，氧利用率为１３％．

漏斗型导流内构件对内循环三相流化床流体力学与传质特性的影响

The effects of funnel-shape internals on hydrodynamics and mass transfer in an internal loop three-phase fluidized bed were investigated.Three different kinds of internals were designed which were setup on the top of draft-tube in terms of horizontal angle and outer diameter, and gas hold up, liquid mixing time, liquid circulation velocity and mass transfer coefficient were measured respectively.It was shown that the riser gas holdup and mass transfer coefficient increased by 10% and 15% than that without such an internal, liquid mixing time decreased by 10% to 25%.When the superficial gas velocity was less than 0.5 cm·s-1, liquid circulation velocity increased with the setup of such internals·Liquid circulation velocity decreased when the superficial gas velocity was above 0.5 cm·s-1.In addition, the variation of structural parameters of funnel-shape internals had significant effects on hydrodynamics and mass transfer.

内循环三相生物流化床启动特性实验研究

本文分别考察了空气流量、水力停留时间、接种污泥浓度及微量元素等因素对内循环三相生物流化床反应器启动挂膜的影响。实验结果表明 ,0 .384L/ min的空气流量对生物膜的培养有利 ;低于 4小时的水力停留时间有利于启动挂膜 ;较少的接种污泥浓度有利于启动挂膜 ,快速排泥的方法能保证反应器启动成功 ;

内循环生物流化床反应器的理论分析

从反应器理论、生物膜动力学及水力学的角度对内循环式三相生物流化床反应器的流态、生物膜降解有机物及启动挂膜特性进行了分析，一认为在内循环三相流化床中，对于一般城市污水处理系统求出了效率因子，建立了内循环速度与反应器尺寸的关系，同时提出了可能进一步提高反应器处理效率的优化途径。