BDO废水生物降解工艺研究

论文总字数：23912字

摘 要

（1）运用SBR序批式活性污泥法处理DBP浓度为10mg/L的BDO污水可以取得98%以上的去除率。水力停留时间为48h，污泥浓度为3.5g/L，溶解氧浓度DO在3.0-4.0mg/L之间为最佳工艺条件。

（2）SBR序批式活性污泥法生物处理工艺的DBP最大承受浓度为24mg/L。在实际运行过程中应控制污水中DBP的浓度在16mg/L以下。

关键词：邻苯二甲酸二丁酯；生物降解；序批式活性污泥法

Study on Process of biodegradation of BDO wastewater

03211719 Name：Wang Wei

Supervised by Wei Jiatai

Abstract： 1,4-butanediol (BDO) is an important organic chemical raw material, it is used widely, has a pivotal role in the petrochemical industry. China Sinopec Yizheng Chemical Fibre Company subsidiaries using hydrogenation of maleic anhydride production of 1,4-butanediol (BDO), the production scale of 100,000 tons / year. Often used in the production process of dibutyl phthalate (DBP) as the organic solvent used to recover unreacted maleic anhydride, containing high concentrations of DBP produce organic wastewater after advanced oxidation pretreatment of waste water DBP concentrations is 10 mg / L . In this paper, the use of gas chromatography / mass spectrometry (GC-MS) DBP concentration was measured by DBP biodegradation experiment, first domesticated sludge, and then were different hydraulic retention time, sludge concentration, dissolved oxygen concentration was controlled conditions, analysis of sequencing batch reactor activated sludge process (SBR) optimal process parameters DBP biodegradation, and draw the critical concentration of the biological system can handle the DBP. The experimental results are as follows：

（1）Sequencing batch reactor(SBR) (activated sludge) precess is used for treatment of DBP concentration of 10mg / L of BDO sewage and 98% removal efficiency can be reached. The optimum process conditions is that HRT is 48h, the sludge concentration is 3.5g / L, dissolved oxygen concentration is between 3.0-4.0 mg/L DO.

（2）SBR biological treatment process of DBP to withstand the maximum concentration of 24mg / L. In actual operation, DBP concentrations in sewage should be controlled bellow 16mg / L.

Key words: Dibutyl phthalate；Biodegradable；Sequencing Batch Reactor

目 录

1绪论………………………………………………………………………1

1.1 研究背景…………………………………………………………………………1

1.1.1仪征化纤BDO生产线现状…………………………………………………1

1.1.2 污水中DBP处理的必要性…………………………………………………1

1.2 DBP降解研究现状……………………………………………………2

1.2.1高级氧化法…………………………………………………………………2

1.2.2 物理化学吸附法……………………………………………………………2

1.2.3 生物降解法…………………………………………………………………3

1.3 仪征化纤前期工作……………………………………………………………5

1.4 BDO污水水质分析作………………………………………………………7

1.5 研究内容…………………………………………………………………………9

2 实验材料与方法……………………………………………………………………………10

2.1 实验装置………………………………………………………………………………10

2.2 水质检测项目及分析方法………………………………………………………11

3 污泥驯化与DBP生物降解实验研究………………………………………………………12

3.1 活性污泥的驯化………………………………………………………………12

3.2 DBP生物降解实验研究……………………………………………………15

3.2.1 水力停留时间对DBP降解效率的影响…………………………………15

3.2.2 污泥浓度对DBP降解效率的影响………………………………………16

3.2.3 溶解氧浓度对DBP降解效率的影响………………………………………18

3.2.4该工艺对DBP的最大承受浓度研究………………………………………19

4结论与建议………………………………………………………………21

4.1 主要结论…………………………………………………………………………21

4.2 研究建议…………………………………………………………………………21

致谢……………………………………………………………………………………………22

参考文献………………………………………………………………………………………23

BDO废水生物降解工艺研究

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