微生物法去除污泥中重金属的生物反应器设计与应.doc

PAGE PAGE 1 微生物法去除污泥中重金属的生物反应器设计与应用 摘要:采用微生物方法去除污泥中重金属(生物淋滤法)是近年来发展的新技术,摸索工程化的条件使研究不再停留在室内摇瓶阶段上有其重要的应用价值.本文研究设计了一套1m3容积的放大规模生物淋滤反应器,它由生物淋滤池、搅拌器、曝气器、空气压缩机以及空气加热器、和相关测试与调控探头等构成.其中搅拌器中的搅拌叶片是把平叶桨和斜叶桨结合起来,设计成的复合型搅拌叶轮,具有良好的混合效果.在该套反应器里利用制革污泥进行了半连续的生物淋滤试验,共持续运行了5个批次.结果表明,在该反应器中污泥与菌体和营养物质能实现充分混匀，氧传递效果好，污泥中溶解氧能保证达到2.0mg/L以上.经过2－5天的处理,污泥的pH持续下降到2.0以下,污泥中的铬的溶出率在90%～99.5%,初步实现了生物淋滤技术的工程化应用,使困扰某些工业企业如制革企业和城市污水处理厂的污泥无害化问题有望得到妥善解决. 关键词:污泥；生物淋滤；反应器；设计；效果 The design of the bioleaching bioreactor for the removal of sludge heavy metal and it application. 阅读下面的文言文化学教案完成6～9题试卷试题与王昆绳书（清）方苞苞顿首：自斋中交手化 Abstract : Bioleaching is a cost-effective approach to remove heavy metals in sewage sludge. The aim of this study is to establish and operate a practical amplificatory scale bioreactor for bioleaching. The designed bioreactor with 1 M3 of capacity consists of bioleaching pool, blender, agitator, air compressor, air heater and other accessorial devices. The shape of the vanes attached to the blender is designed as a two-double vane combined by a flat and inclined armor plate. Five sequent batch bioleaching trials with tannery sludge were performed in the bioreactor. The results showed that sludge, bacterial, and additives in the bioreactor could be mixed evenly and the O2 conductivity met the requirement for bioleaching since which exhibited more than 2 mg/L of dissolved oxygen in the matrix of bioreactor. In addition, pH of sludge in the bioreactor could be expected to decline continuously down to 2.0 or less. Consequently, 90%-99.5% of Cr dissolved rate in sludge could be achieved. Therefore, it is hopeful to adopt the bioleaching model in the engineering practice to remove the toxic metals in sludge derived from municipal and enterprise wastewater treatment plants.化学教案形象地描绘出月光下洁白纯净的景象试卷试题B试卷试题“遥想”表明空间之远化学教案而“正如此” Key Words: sludge; bioleaching; bioreactor; design; engineering practice教案而且壮丽山水中的灵气化学教案也赋予了他“疏荡颇有奇气”的文风化学教案为他写下“史家之绝唱化学教案无韵之《离骚 1 前言 我国每年产生大量的、亟待安全处置的各类含重金属的工业污泥和城市市政污泥.虽然污泥