Fenton氧化—厌氧—接触氧化联用技术处理医药废水的工程研究

发布时间：2018-09-19 18:10

【摘要】：医药行业废水具有有机污染物浓度高,有毒有害物质多等特点,属于我国工业水处理领域的热点与难点。针对医药废水可生化性不高,难降解有机物种类多的问题,本文对Fenton氧化-厌氧-接触氧化联用技术处理医药废水性能进行了研究。论文首先考察了 Fenton氧化技术处理医药废水的效果,优化了 Fenton氧化处理医药废水的工艺参数;在此基础上,设计和建立了 Fenton氧化-厌氧-接触氧化联用技术处理200m~3/d医药废水过程,并进行了调试优化,处理后出水满足相关的设计标准。具体研究结果如下。1.Fenton小试试验结果表明,在进水COD浓度约60000mg/l的条件下,随着H_2O_2与去除COD质量之比的增加,COD去除率达到极值后缓慢下降;SS去除率则不断降低。随着n(H_2O_2)与n(Fe2+)的比值增加,COD去除率达到极值后缓慢下降;SS去除率则不断降低。针对此类废水,体系最佳的反应条件为:m(H_2O_2):m(COD)=2:1、n(H202):n(Fe2+)=10:1、pH=2、t=40min。废水中 COD 和 SS 去除率分别为57.02%和 79.77%。2.本论文采用厌氧-好氧生物处理工艺,Fenton装置的水力停留时间为HRT=8.13h;缺氧池的水力停留时间为HRT=8.25h,有效水深为H=4.5m;接触氧化池的水力停留时间为HRT=16.1h,有效水深为H=4.4m,容积负荷为2.0kgCOD/m~3.d.3.在200m~3/d的工程过程中,经过Fenton氧化装置、厌氧反应池、接触氧化池,医药废水中COD、SS等均有较高的去除率。经过Fenton装置COD、SS平均去除率分别为29.34%、67.36%。再经过厌氧装置处理后其厌氧出水COD、SS、NH3-N 的最佳值为 4700mg/l,245mg/l,55mg/l,去除率分别为 62.20%,65.09%,73.17%。最后经过接触氧化池处理后,出水中COD、SS、TN、NH3-N、TP的去除效果都明显高于厌氧条件下,通过联用技术,最后达标排放。其最佳出水值分别为 80mg/l,56mg/l,34mg/l,6.4mg/l,5.4mg/l,去除率分别为 98.26%,71.13%,73.01%,85.11%,50.94%。上述研究表明,Fenton氧化-厌氧-接触氧化联用技术对医药废水中的有机物降解作用明显。通过Fenton氧化反应体系将污水中的大分子有机物氧化分解为小分子有机物,提高了后续生物处理的可生化性,厌氧反应系统进一步将污水中难降解有机物分解为易降解有机物,再通过接触氧化将有机物彻底降解。
[Abstract]:Pharmaceutical wastewater has the characteristics of high concentration of organic pollutants and many toxic and harmful substances. It is a hot and difficult point in the field of industrial water treatment in China. Aiming at the problem that the biodegradability of pharmaceutical wastewater is not high and there are many kinds of refractory organic compounds, this paper studies the performance of Fenton oxidation-anaerobic-contact oxidation technology in treating pharmaceutical wastewater. In this paper, the effect of Fenton oxidation technology on the treatment of pharmaceutical wastewater was investigated, and the process parameters of Fenton oxidation treatment were optimized. The process of Fenton oxidation-anaerobic contact oxidation combined treatment of 200m~3/d pharmaceutical wastewater was designed and optimized. The treated effluent met the relevant design standards. The results are as follows: 1. The results of Fenton small scale test show that under the condition of influent COD concentration about 60000mg/l, with the increase of the mass ratio of H_2O_2 to COD, the removal rate of H_2O_2 reaches the extreme value, and then the removal rate of SS decreases gradually. With the increase of the ratio of n (H_2O_2) to n (Fe2), the removal rate of H_2O_2 decreased slowly and the removal rate of SS decreased. The optimal reaction conditions for this kind of wastewater are: 1: M (H_2O_2): 2: 1 (COD) (H202): n (Fe2) 10: 1 (pH = 10: 1). The removal rates of COD and SS in wastewater were 57.02% and 79.77.2%, respectively. In this paper, the hydraulic retention time of HRT=8.13h; anoxic tank was 4.5m for HRT=8.13h;, HRT=16.1h, was 4.4m for contact oxidation tank, and the volumetric load was 2.0kgCODm3.d.3The HRT of Fenton plant was 4.4m. the HRT of Fenton plant was as follows: the HRT of HRT=8.13h; anoxic tank was 4.5m. the HRT of contact oxidation tank was HN4.4m. the hydraulic retention time of Fenton plant was 2.0kgCODm3.d.3. In the engineering process of 200m~3/d, the removal rate of COD,SS in Fenton oxidation plant, anaerobic reactor, contact oxidation tank and pharmaceutical wastewater is higher. The average removal rate of COD,SS by Fenton was 29.34% and 67.36% respectively. The optimum value of COD,SS,NH3-N in anaerobic effluent is 4700mg / L 245mg / L and the removal rate is 62.20g / L 65.09% 73.17mg / l, respectively. After the treatment of contact oxidation tank, the removal efficiency of COD,SS,TN,NH3-N,TP in effluent is obviously higher than that in anaerobic condition. The optimal effluent value is 80 mg / L / 56 mg / L 34 mg / L = 6.4 mg / L = 5.4 mg / L, and the removal rate is 98.26% and 71.13% / 73.01% and 85.11% respectively. The results showed that Fenton oxidation-anaerobic-contact oxidation combined with Fenton oxidation had obvious effect on the degradation of organic matter in pharmaceutical wastewater. The macromolecular organic matter in wastewater was oxidized into small molecular organic matter by Fenton oxidation reaction system, which improved the biodegradability of subsequent biological treatment, and the anaerobic reaction system further decomposed the refractory organic matter into easily degradable organic matter. The organic matter is thoroughly degraded by contact oxidation.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X787

【参考文献】

相关期刊论文 前10条

1 裴建伟;;医药化工厂废水、废气综合治理工程设计的探讨[J];黑龙江科技信息;2016年19期

2 吴广凤;;垃圾渗滤液处理技术研究进展[J];广东化工;2016年02期

3 陈岗;刘荣琼;钱福国;;Fenton-A~2O工艺在制药工业废水深度处理中的应用[J];工业用水与废水;2015年06期

4 陈昌洁;;医药化工废水处理技术应用问题与应对[J];资源节约与环保;2015年02期

5 王艳红;;生物制药现状和未来发展趋势[J];黑龙江科学;2015年02期

6 孙雪松;;纳米TiO_2在处理难降解有机废水中的应用及其研究进展[J];市政技术;2014年06期

7 陈均尉;;医药化工废水工程处理技术概述[J];科技创新与应用;2014年12期

8 张蓉蓉;;Fenton试剂处理邻氯苯胺废水的研究[J];化学工业与工程技术;2013年02期

9 孙茂龙;徐雪昱;任继勤;;我国医药制造业的现状及发展对策[J];化工管理;2012年11期

10 杨延云;朱超;;我国生物制药产业的发展现状与趋势[J];广州化工;2012年09期

相关博士学位论文 前1条

1 陈波;我国生物医药产业创新平台运行与治理研究[D];复旦大学;2014年

相关硕士学位论文 前10条

1 扶咏梅;UV-K_2S_2O_8耦合处理抗生素废水研究[D];郑州大学;2016年

2 刘英辉;高浓度医药中间体废水处理的研究与工程应用[D];南昌大学;2015年

3 黄焕娣;水解酸化—微生物电辅助系统处理抗生素废水的效能研究[D];哈尔滨工业大学;2015年

4 柏元勋;复合混凝法处理阳离子染料印染废水的研究[D];青岛理工大学;2014年

5 孙翼虎;无机絮凝剂+Fenton工艺深度处理中晚期垃圾渗滤液的研究[D];湖南大学;2013年

6 赵海霞;厌氧—好氧工艺对制药废水处理的研究[D];内蒙古农业大学;2012年

7 郭全全;Fenton催化氧化处理农药废水研究[D];长安大学;2011年

8 王娟;Fenton和UV-Fenton法预处理生物制药废水的试验研究[D];郑州大学;2011年

9 秦伟伟;O_3高级氧化技术处理黄连素制药废水研究[D];山东科技大学;2011年

10 孙绪顺;厌氧生物处理中丙酸降解的控制条件研究[D];上海交通大学;2010年

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