高浓度吡啶废水处理工艺的实验研究毕业论文
2022-05-14 19:49:01
论文总字数:15720字
摘 要
在含氮杂环化合物中,吡啶是一类危害较大的有机污染物,随着工业的发展,吡啶不断的被开发使用,因其水溶性较强,能很快的在土壤与地下水之间进行转移,在环境中很难被去除,导致环境恶化甚至危及人类的生命健康,因此加强对废水中吡啶类物质的有效处理是十分必要的。
本文针对高浓度的吡啶模拟废水,采用Fenton氧化法对废水进行预处理,小试实验确定的最佳工艺操作条件为:30%浓度的H2O2投加量为6mL/L、n(H2O2:FeSO4)为10:1、反应初始pH值为3以及反应时间为160min。在该操作条件下,吡啶和TOC的去除率分别为27%和21%,但TN的去除效果不明显。在此基础上,采用A2/O生化工艺对经过Fenton预处理后的废水进行后续处理,实验结果表明,吡啶的降解过程主要在缺氧-好氧工段进行,去除率可达95%以上;在厌氧段的去除率基本稳定在50%左右。
对于吡啶浓度2800mg/L,TOC1992mg/L的吡啶模拟废水,Fenton氧化预处理出水的吡啶浓度和TOC浓度可分别降至2050mg/L和1520mg/L以下。生化处理出水吡啶浓度和TOC浓度可分别降至20mg/L和100mg/L以下。
关键词:吡啶 模拟废水 Fenton氧化法 A2/O工艺 缺氧-好氧
Experimental study on high concentrations of pyridine wastewater treatment process
Abstract
In the nitrogen-containing heterocyclic compounds, pyridine is a kind of harmful organic pollutants, with the development of industry, pyridine constantly being developed using, because the strong water-soluble, can transfer in the soil and groundwater quickly, it is difficult to be removed in the environment, leading to environmental degradation and even endanger human life and health, thus enhancing the effective treatment of waste water in pyridine substances is necessary.
This article is studied on wastewater for high concentrations of pyridine, wastewater using Fenton oxidation pretreatment process, small scale experiments to determine the optimum operating conditions: 30% of the concentration of H2O2 dosage is 6mL/L, n(H2O2:FeSO4) is 10:1, the initial pH of the reaction is 3 and reaction time is 160min. In this operating condition, the removal of pyridine and TOC are 27% and 21%, but the removal of TN is not obvious. On this basis, the use of A2/O biological process of waste water through Fenton after pretreatment for subsequent processing, experimental results show that the degradation process of pyridine, mainly in anoxic-aerobic reaction and the removal rate is more than 95%; the removal of anaerobic is basically stable at around 50%.
For pyridine concentration 2800mg/L, TOC1992mg/L of pyridine wastewater, Fenton pyridine concentration and oxidation pretreatment effluent TOC concentration can be reduced to 2050mg/L and 1520mg/L or less, respectively. Biochemical treatment effluent concentration of pyridine and TOC concentrations were reduced to 20mg/L and 100mg/L or less.
Key Words:pridine; wastewater; Fenton oxidation; A2/O process; hypoxia-aerobic
目 录
摘 要 I
Abstract II
第一章 绪论 1
1.1 吡啶的性质及其来源与危害 1
1.1.1 吡啶的基本性质 1
1.1.2 含吡啶废水的来源 1
1.1.3 含吡啶废水的危害及影响 1
1.2 含吡啶废水的处理方法 1
1.2.1 物理化学法 2
1.2.2 高级氧化法 3
1.2.3 生物法 4
1.3 课题来源及研究思路 5
1.3.1 论文研究的目的 5
1.3.2 研究途径 5
第二章 实验材料与检测方法 6
2.1 实验材料 6
2.1.1 实验药品 6
2.1.2 实验仪器 6
2.2 检测指标与方法 7
2.2.1 吡啶浓度的检测方法 7
2.2.2 其他测定指标及方法 8
第三章 实验部分 9
3.1 实验水质 9
3.2 Fenton氧化实验 9
3.2.1 实验方法 9
3.2.2 实验结果与讨论 9
3.3 生化处理实验 13
3.3.1 实验装置 13
3.3.2 进水水质 14
3.3.3 生化系统运行条件 14
3.3.4 实验结果与讨论 14
第四章 结论与展望 22
4.1 结论 22
4.2 展望 22
参考文献 23
致谢 25
第一章 绪论
1.1 吡啶的性质及其来源与危害
1.1.1 吡啶的基本性质
吡啶(C5H5N),是典型的含有一个氮原子的六元杂环化合物。它是一种无色或微黄的液体,有刺激性气味,在常温下可溶于水、醇和醚等有机溶剂,又能溶解大多数极性和非极性有机化合物,是一种优良的溶剂。
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