论文总字数：20531字

摘 要

本文首先对现阶段污水处理背景进行介绍。并介绍了厌氧生物流化床在污水处理中的应用。 并选用PTA废水作为研究对象，进行污染物降解效能研究。设计出放大型快速传质厌氧生物流化床反应器。考察了流化床内流体混合时间与载体装填量和循环水流量之间的关系。对实验结果进行初步的理论分析，得到了以下结论：

1. 在不投加载体情况下，流体混合时间随循环水流量的增加而减小，密度稍大的PP载体在流化中的变现更好在恒定的循环水流量条件下，混合时间随着载体装填量的增加先减小后增大，在不考虑反应器内微生物浓度情况下，最佳的载体装填量为有效流化体积的30%，最佳的循环水流量为50 L/min
2. 当循环泵开启时，该反应器沉降区的流体具有向下的流化速度，且流化速度与循环水流量成正比。该流化速度能够保证导流筒内外的环流流化，实现相间的快速传质，提高反应器的处理效率。
3. 采用PP材质有机填料为微生物载体，利用放大型快速传质厌氧生物流化床反应器进行PTA废水的处理,当反应器启动挂膜期间控制HRT为42 h，启动挂膜进行到42 d时，系统启动挂膜成功。
4. 反应器稳态运行期间不断提高有机容积负荷，当系统HRT缩短至17 h时，COD浓度为5500 mg/L左右，TA浓度为1700 mg/L左右，反应器有机容积负荷为4.6 kgCOD/(m³·.d)，COD和TA去除率分别维持在61%和56%上下反应器显示出良好的抗负荷冲击性能。

关键词：污水处理 PTA废水 厌氧流化床反应器

The research of internal circulation anaerobic fluidized bed and itsapplication in wastewater treatment

Abstract

First of all, this article introduces background on the sewage treatment at present stage And introduces the application of anaerobic biological fluidized bed in sewage treatment.including designed to put large fast mass transfer anaerobic biological fluidized bed reactor on the basis of rapid mass transfer anaerobic biological fluidized bed test in the PTA wastewater treatment research.looked at relation between fluidized bed fluid mixing time and vehicle loading quantity as well as that between fluidized bed fluid mixing time and the circulating water flow.Study on the degradation efficiency of pollutants.we used as PTA wastewater a proxy.The theoretical analysis of the experimental and design results is carried out in this paper.And made a reasonable explanation.Conclusions are as follows:

(1) in a vote of no load condition, the fluid mixing time decrease with the increase of circulating water flow, PP carrier density slightly larger in flow realization the of the better under the constant flow of recirculated water conditions, mixing time with the carrier filling quantity increases and then decreases and then increases, in test anxiety in the reactor microbial concentration, the optimum carrier loading amount for effective flow volume of 30%, the optimum circulating water flow is 50 L / min.

(2) When the circulation pump is started, the reactor settlement of fluid with downward flow velocity and flow velocity and the circulating water flow is proportional to the. The flow speed to ensure that the draft tube inside and outside the circulation fluidization, phase of rapid mass transfer and improve the treatment efficiency of the reactor.

(3) Using PP material organic filler as microbial carrier, PTA wastewater treatment using large fast mass transfer anaerobic biological fluidized bed reactor, when the reactor startup period of membrane hanging control HRT for 42 h, start-up to 42 d boot the success of the biofilm.

(4) Reactor steady state operation during the continuous improvement of organic volume load, when the HRT was reduced to 17 h, concentration of PTA is about 5500 mg / L, the TA concentration was about 1700 mg / L, reactor shows good resistance to impact load performance.

Key Words：Sewage;treatment PTA;wastewater anaerobic fluidized bed

目录

摘 要 I

Abstract II

第一章：文献综述 1

1.1 前言 1

1.2 废水处理方法 1

1.2.1 物理化学法 1

1.2.2 生物流化床 2

1.3 研究目的及内容 3

第二章 快速传质厌氧生物流化床放大设计及流化特性研究 5

2.1 引言 5

2.2.1 实验装置 6

2.2.2 实验材料与方法 9

2.3 实验结果与分析 9

2.3.1 循环水流量对流化床混合时间的影响 9

2.3.2 载体装填量对混合时间的影响 10

2.3.3 循环水流量与载体装填量对混合时间的影响 12

2.3.4 反应器内部流体扩散的可视化实验 13

2.4 本章小结 15

第三章 放大型快速传质厌氧生物流化床处理PTA废水研究 16

3.1 前言 16

3.2 实验材料与方法 16

3.2.1 实验装置 16

3.2.2 实验用水、接种污泥及微生物载体 16

3.2.3 实验仪器与试剂 17

3.2.4实验主要检测项目及分析方法 18

3.3 反应器的启动与挂膜 19

3.4 实验结果与讨论 20

3.4.1 厌氧流化床反应器启动期间污染物去除情况 20

3.4.2 厌氧流化床反应器稳态运行期间污染物去除情况 22

3.5 本章小结 23

第四章 结论与展望 24

4.1 结论 24

4.2 展望 24

参考文献 26

致谢 28

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