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污水处理厂污泥酸性发酵实现挥发酸产量最大化实验研究

Study on the Maximum Prduction of VFA during Acidogensis of Sludge from WWTP

【作者】 杨亚静

【导师】 李亚新;

【作者基本信息】 太原理工大学 , 环境科学, 2006, 硕士

【摘要】 课题对污水处理厂污泥的酸性发酵产生挥发酸的规律进行了实验研究。 BAP(Biochemical Acidogenic Potential)实验研究了接种厌氧污泥、CHCl3的投加量、起始pH值、微量营养元素和污泥种类对污泥生化产酸势的影响。实验结果表明:未接种厌氧污泥的污泥进行酸性发酵的产酸效果比接种了厌氧污泥的污泥产酸效果好;投加0.03mM CHCl3抑制剂的污泥产酸发酵效果最好,能有效抑制产甲烷菌的活动,从而避免了甲烷气体的产生;调节实验初始pH值和微量营养元素的添加对酸性发酵实验中污泥BAP没有很大的促进作用;污泥的发酵时间为13~28d,所产生的挥发酸种类为乙酸、丙酸和丁酸,其中乙酸占主要部分。 通过污泥的BAP实验,对于3g污泥量,我们得到在不接种厌氧污泥、CHCl3投加量为0.03mM、BaCl2添加量为2mM.、温度为22~28℃之间、搅拌转速为180r/min这样的条件下,污泥BAP值是最大的,产生的挥发酸最大量为0.298 gVFA/gVS。 污泥酸性发酸的批量运行实验中,采用序批式反应器,用正交实验的方法考察了污泥投配比、温度和搅拌方式对污泥产酸量的影响。实验结果表明:反应器中pH值和ORP值的变化均处于产酸菌

【Abstract】 The regulation of acidogenisis of sludge from waste water treatment plant (WWTP) was studied in a lab-scale experiment.The effect of some factors such as the characteristic of inoculated anaerobic sludge, the use quantum of CHCl3, original pH, the addition of microelement and the variety of sludge on the biochemical acidogenic potential (BAP) of sludge were investigated.The result indicated that the sludge which was not inoculated with anaerobic sludge has better acidogenic efficiency than that of sludge inoculated with anaerobic sludge. To inhabit the production of methane gas and to achieve the maximum production of volatile fatty acid (VFA), CHCl3 was added as inhabitator and the optimal quantum is 0.03mM. Adjusting the original pH and adding microelement had not eminent effect on the BAP of sludge. When the fermentation time of sludge lies from 13 to 28 days, the volatile fatty acid composition involved acetic

  • 【分类号】X703
  • 【被引频次】12
  • 【下载频次】485
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