-
摘要：由于全球的逐渐变暖，温室气体越来越引起人们的重视。和CO2、CH4一样,气体N2O与臭氧层的破坏、酸雨的形成有着密不可分的关系。废水生物脱氮是N2O产生的一个重要途径，主要产生于硝化与反硝化过程中。本文对厌氧好氧序批式活性污泥工艺脱氮过程中温室气体N2O的释放规律进行了研究，并分析了温度对工艺脱氮效果及气体释放规律的影响。温度对氨氮和总氮的去除影响较大，而对TOC的影响并不明显。25℃条件下，工艺对氨氮和总氮的去除率要明显高于15℃ 。N2O的释放主要集中于A/O SBR工艺的好氧阶段，并且15℃条件下，反应器中N2O的释放总量远高于25℃条件下，这主要是因为低温对N2O还原酶的抑制作用造成的。40160
- 上一篇：新型电化学反应器的研究与应用
- 下一篇：生活小区污水处理工艺设计
毕业论文关键词：A/O SBR N2O 生物脱氮
Study on the emission characteristics of greenhouse gas N2O during nitrogen removal process of A/O SBR
Abstract: As a result of global warming, greenhuose gas has caused more people，attention. As the same of CO2 and CH4, N2O has something with the formation of acid- rain, destruction of the ozone layer. Wastewater biological nitrogen removal is an important way of N2O, It mainly produced in the nitrification and denitrification. In this paper, we have studied the regularity of the greenhuose gas N2O in the process of A/O SBR denitrification, analyezes the effect of temperature on process denitrification and the influence of the gas release regularity. The effect of temperature on ammonia nitrogen and nitrigen removal is larger, and the impact on the TOC is not obvious. At 25℃, the removal rate of ammonia nitrogen and total nitrogen is higher than 15℃. The release of N2O is mainly focused on aerolbic phase of A/O SBR, and at the conditon of 15℃, the release of N2O amount is much than 25℃ condition, this is mainly because of low temperature on N2O reductase inhibitory effect.
Keywords: A/O SBR nitrous oxide biological denitrification
目录
摘要1
Abstracrt..1
一、前言.2
1.1活性污泥污水处理概况..2
1.1.1活性污泥法的简介2
1.1.2活性污泥的起源与发展.2
1.1.3活性污泥法的基本流程与评价指标..2
1.2A/O SBR 工艺简介.3
1.2.1A/O工艺的概念和特点3
1.2.2A/O工艺的基本原理.3
1.2.3SBR工艺的概念和特点3
1.2.4SBR工艺的技术原理..4
1.3N2O的简介5
1.3.1N2O的环境效应5
1.3.2N2O的来源..5
1.4污水处理过程中N2O的产生机理.6
1.5研究内容和研究目的.7
1.5.1研究内容..7
1.5.2研究目的..7
二、实验材料与方法7
2.1反应器的结构及运行方式..7
2.2模拟废水水质.8
2.3实验内容9
2.3.1反应器出水水质的测定..9
2.3.2反应器典型周期内氮磷转化过程测定..9
2.3.3反应器曝气阶段N2O释放速率测定..9
2.4实验测定方法与仪器
2.4.1水质测定方法9
2.4.2N2O的测定方法.10
三、结果与分析11
3.1反应器典型周期内的运行效果.11
3.2反应周期内污染物浓度的变化.12
3.3N2O的释放率及其释放总量.14
四、结论15
五、参考文献.16
A/O SBR工艺脱氮过程中温室气体N2O的释放规律研究一、前言
1.1活性污泥污水处理工艺概况
1.1.1活性污泥法的简介
活性污泥法是一种污水的好养氧生物处理方法，它能够广泛的适应水质水量，其运行方式灵活多样，可控性良好，并且能够有效的脱氮除磷。它能够去除污水中可生物降解的有机物，和一些能被其吸附的悬浮固体、无机盐类物质。
1.1.2活性污泥的起源与发展