电化学法处理猪场粪污水的研究

论文编号:HG074  论文字数:10216,页数:26

 摘 要：本文采用GB11914-89规定水质化学需氧量的测定（重铬酸钾法）COD；研究了用两个铁电极作为阴极和阳极的电解池对污水进行电解后污水COD的去除率的大小以及污水PH值的改变，考察了不同电压、电流密度、通电时间对其的影响以及做了加入硫酸亚铁和搅拌通电对比实验，并得出结论：电流密度=16.25mA/cm2，t=4h，r=200r/min。COD去除率为60.1%；污水颜色由黄褐色变为透明无色，污水的PH值随电流密度的增大达到16.25 mA/cm2时达到最大值10.27之后有所下降。而Fe2SO4在加入量为0.104g/ml时污水COD的去除率达到极值55.8%左右；污水颜色由黄褐色至透明无色，而与电解法正好相反，随着的加入量的增大，PH值则不断下降使污水呈酸性。因此，搅拌下的电解法处理污水较为优越。
 关键词：电化学；污水；COD

 Use electrochemical mothed to treat pig manure sewage
 
 
Abstract: This article uses the GB11914-89 stipulation the determination of the chemical oxygen demand of water(K2Cr2O7 mothed) to test COD level ; Studies the affection of carrying on the electrolysis to the sewage with two ferroelectricity and the affection of different voltage, different current density, different time, adds FeSO4 and electrolysis agitation, and draws the conclusion: With the current density is 16.25mA/cm2，t=4h，r=200r/min, the effort of the electrochemical treatment is in the best way, COD reduction is about 60.1%,the color turns from filemot to none, along with the current density increased to a maximum current density 16.25 mA/cm2 pH value of the sewage reach at extreme value 10.27 before declining. While the addition of FeSO4 reached 0.104g/ml, COD reduction is 55.8%.The color turns from filemot to none. Just the opposite, with FeSO4 increase, pH value continuely falling which lets the sewage shows acid. Therefore, the mixing of the electrolysis treatment is more advantageous.

Keywords: Electrochemistry; Sewage; COD

目  录
中文摘要 I
英文摘要 II
目录 III
1. 绪论 1
 1.1  畜禽养殖场环境污染现状及给环境带来的压力 1
 1.2  养殖场粪污的排放标准 1 
 1.3  电化学水处理的分类 1
 1.4  电化学处理污水的机理 2
 1.5  化学需氧量COD的测定原理 6
2. 实验部分 8
 2.1  污水pH值得测定原理 8
 2.2  污水COD的测定方法 8
 2.3  电解方法 11
3. 结果与讨论 14
 3.1  电流密度对COD去除率的影响 14
 3.2  电解时间对COD的影响 15
 3.3  搅拌速率对COD的影响 17
 3.4  对照实验——FeSO4沉降实验 18
4．总结与展望 20
致谢 21
参考文献 22