集成模块式污水处理装置同步硝反硝化(SND)处理低碳氮(C/N)比污水的实验研究

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• 英文论文题名：Study on Performance Characteristics of Simultaneous Nitrification and De-nitrification(SND) for low carbon/nitrogen(C/N) ratio wastewater in an integrated device
• 论文作者：邓时海 ; 李德生 ; 卢阳阳 ; 曾琪静
• 英文论文作者：DENG Shi-hai ; LI De-sheng ; LU Yang-yang ; ZENG Qi-jing ; School of Civil Engineering ; Beijing Jiaotong University
• 年：2013
• 作者机构：北京交通大学土建学院市政与环境工程系;
• 论文关键词：集成模块式污水处理装置 ; 同步硝化反硝化(SND) ; 低碳氮比(C/N)污水 ; 深度脱氮 ; 动力学模型求解
• 英文论文关键词：integrated wastewater treatment device ; simultaneous nitrification and denitrification(SND) ; low C/N ratio wastewater ; deep denitrogen ; dynamic model solving
• 会议召开时间：2013-12-26
• 会议录名称：2013年水资源生态保护与水污染控制研讨会论文集
• 语种：中文
• 分类号：X703
• 学会代码：HJKP
• 会议名称：2013年水资源生态保护与水污染控制研讨会
• 会议地点：中国黑龙江哈尔滨
• 主办单位：中国环境科学学会、环境保护部环境规划院、哈尔滨工业大学、哈尔滨师范大学、中国科学院南京地理与湖泊研究所
• 学会名称：中国环境科学学会
• 页数：10
• 文件大小：1338k
• 原文格式：D
• 会议级别：全国

摘要

中小城镇生活污水较分散、水量小、碳氮(C/N)比低,难以实现集中大规模处理和生物深度脱氮,外排则易引起接纳水体富营养化,因此实现小水量低C/N比污水一体化深度脱氮具有重要意义。以模拟低C/N比污水为研究对象,采用集成模块式污水处理装置与技术,研究了在不同DO、HRT、C/N比、p H下污水氨氮、总氮的去除,实现了同步硝化反硝化(SND),研究结果表明,DO=1.2-1.4 mg/L,总HRT=20h(第一反应区HRT=2h),原水C/N=5:1,p H=7.5时,NH3--N可以从15mg/L降至2.5mg/L,总氮可以从20mg/L降至4mg/L,去除率可以达到83%和80%;反应器以第一反应区为主反应区实现同步硝化反硝化(SND),SND动力学模型求解得出集成模块式污水处理SND动力学方程及反硝化过程中硝酸盐氮饱和常数KD=2.58,远高于普通活性污泥反硝化过程中的饱和常数0.2-0.5mg/L。集成模块式污水处理技术能高效去除低C/N比污水中的总氮,且具有运行稳定和抗冲击等优点。为中小城镇生活污水深度脱氮提供了技术支持和理论基础。
It is difficult to achieve centralized treatment and biological deep denitrogen of wastewater from small town due to low C/N ratio and small discharge. If the tail water discharged into water body, the eutrophication could be produced due to higher concentration of total nitrogen. Therefore, the study on deep denitrogen technology for low C/N ratio small discharge is of important significance. In this paper, the ammonia and total nitrogen(TN) removal efficiency of SND in an integrated device and its influence factors,such as DO concentration, HRT, C/N ratio, influent p H, etc., were studied and analyzed. The dynamic model of SND in the system was solved. The results showed that total nitrogen can be decreased to 4 mg·L-1 from20mg·L-1(80%), ammonia to 2.5 mg·L-1 from15mg·L-1(83%) by the SND in the integrated device at conditions of DO 1.2-1.4 mg·L-1, HRT 20h(2h in the first reaction zone), C/N ratio 5:1, influent p H 7.5. The TN removal was mainly happened in the in the first reaction zone. of 2.58 was obtained by solving dynamic model of SND in the system, which was well above that of traditional active sludge process(0.2-0.5mg·L-1). The results indicate that TN of low C/N ratio wastewater can be removed efficiently by this technology. The integrated wastewater treatment technology is of the advantages of operation stability and shock resistance etc., and could be a basis for advanced nitrogen removal of low C/N ratio small discharge from small town and countryside.

引文

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