Development of Effective Biological Treatment Process of Organic and Nitrogenous Substances in Wastewater

废水中有机物和含氮物质的有效生物处理工艺的开发

• 批准号: 07555559
• 负责人: UNNO Hajime
• 金额: $ 5.18万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555559/
• 关键词: wastewater treratment; organic oxidation; nitrification; denitrification; porous support particles; fluidized-bed bioreactor; aerobes; anaerobes; 消化反応

In biological wastewater treatment process, organic compounds are generally removed by aerobic microbes, while nitrogenous substances are removed by a combination of aerobic nitrification and anaerobic denitrification. Nitrification carried out by nitrifiers transfers ammonia to nitrite and nitrate, and denitrification reduces the nitrogen oxides to nitrigen gas. The present research aims to develop an effective biological process for simultaneous removal of organic and nitrogen substances in wastewater by cohabitation of aerobic and anaerobic microbes in porous particle carriers. This research made clear the factors related to the simultaneous removal of organic and nitrogenous substances, and laid the engineering foundation of developing such process. The research results obtained in the present research were summarized as follows.Using a model bioreactor installed with porous sheets of definite thickness, spatial distribution of microbial species in the porous sheets was analyzed qu … More antitatively. The organic oxidizing bacteria, nitrifiers and denitrifiers showed a unique distribution pattern in the porous sheets. A mathematical model taking microbial growth and death kinetics into account was proposed and successfully explained the microbial distribution. These results showed that cohabitation of aerobic and anaerobic microbes could be formed artificially.In order to obtain the basic engineering data for the simultaneous removal of organic and nitrogen substances in wastewater, a continuous-flow fluidized-bed bioreactor consisting of porous particle carriers was constructed to treat artificial sewage. The reactor was operated aerobically by aeration with a sparger (DO=6-7ml/L), and the sewage was fed continuously at a hydraulic retention time of 8h. Ratio of Carbon concentration to nitrogen concentration (C/N ratio) in the wastewater varied from 2.5 to 10. At the steady state, total nitrogen removal ratio increased from 50% to 85% with C/N ratio in case of influent nitrogen concentration = 20 mg/L,while in case of influent nitrogen concentration = 40 mg/L,the total nitrogen removal ratio was between 40 - 50%, independent of C/N ratio.Based on the experimental results, a kinetic analysis of the microbial reactions related to simultaneous removal of organic and nitrogenous substances was performed. The rate constants of orgainc oxidation, nitrification and denitrification were obtained and found to be dependent on the organic loading and influent nitrogen concentration. At low C/N ratio, denitrification contributed largely to the nitrogen removal, while nitrogen removal was mainly dependent on the nitrogen uptake by microbial growth at high C/N ratio. Less

在废水生物处理过程中，有机物的去除一般是通过好氧微生物进行的，而含氮物质的去除则是通过好氧硝化和厌氧反硝化的结合进行的。硝化菌进行的硝化作用将氨转化为亚硝酸盐和硝酸盐，反硝化作用将氮氧化物还原为氮气。本研究旨在通过多孔颗粒载体中好氧和厌氧微生物的共存，开发一种有效的同时去除废水中有机物和氮物质的生物工艺。本研究明确了同时去除有机物和含氮物的相关因素，为开发该工艺奠定了工程基础。本研究的主要研究成果如下：利用一个安装有一定厚度多孔板的模型生物反应器，分析了多孔板中微生物的空间分布， ...更多信息 抗氧化剂有机氧化细菌、硝化细菌和硝化细菌在多孔板中呈现出独特的分布格局。提出了一个考虑微生物生长和死亡动力学的数学模型，成功地解释了微生物的分布。为获得同时去除污水中有机物和氮物质的工程基础数据，构建了多孔颗粒载体连续流流化床生物反应器处理人工污水。反应器采用曝气好氧运行，DO为6- 7 ml/L，水力停留时间为8h，连续进水。废水中的碳浓度与氮浓度之比（C/N比）在2.5至10之间变化。在稳态条件下，当进水氮浓度为20 mg/L时，总氮去除率随C/N比的增加而增加，从50%增加到85%;当进水氮浓度为40 mg/L时，总氮去除率在40 ~ 50%之间，与C/N比无关。对与同时去除有机物和含氮物质有关的微生物反应进行动力学分析。得到了有机物氧化、硝化和反硝化的速率常数，并发现其与有机负荷和进水氮浓度有关。在低C/N比下，反硝化作用对脱氮贡献较大，而在高C/N比下，脱氮主要依赖于微生物生长对氮的吸收。少

项目成果

H.Unno, M.Yanagida, X.-H.Xing and Y.Tanji: "A simulation of retained microbial reactor system for simultaneous removal of carbonaceous and nitrogenous compounds in wastewater." Proceedings of Symposium on Mathematical Modelling and Simulation in Agricultu

H.Unno、M.Yanagida、X.-H.Xing 和 Y.Tanji：“模拟保留微生物反应器系统，用于同时去除废水中的碳质和含氮化合物。”

けい新会,D.Agustiyani,海野 肇: "廃水中の有機質及び窒素の同時除去のための多孔質担体担持微生物群の分布" 日本水環境学会年会講演要旨集. 30. 1-A-17-1 (1996)

Keishinkai、D.Agustiyani、Hajime Unno：“多孔载体上的微生物分布，用于同时去除废水中的有机物和氮”日本水环境学会年会摘要 30. 1-A-17 -1。 (1996)

H.Unno, M.Yanagida, X.-H.Xing and Y.Tanji: "A simulation of retained microbial reactor system for simultaneous removal of carbonaceous and nitrogenous compounds in wastewater" Proceedings of Symposium on Mathematical Modelling and Simulation in Agricultur

H.Unno、M.Yanagida、X.-H.Xing 和 Y.Tanji：“同时去除废水中碳质和含氮化合物的保留微生物反应器系统的模拟”农业数学建模与模拟研讨会论文集

X.-H Xing, N.F.Puspita and H.Unno: "Simultaneous treatment of xenobiotic chemical and nitrogenous compounds by an activated sludge in multi-stage bioreactor system." IA WQ 18th Biennial, International Conference P-NR03. (1996)

X.-H Xing、N.F.Puspita 和 H.Unno：“在多级生物反应器系统中通过活性污泥同时处理外源化学物质和含氮化合物。”

X-HXing. N.F.Puspita and H.Unno: "Simultaneous treatment of xenobiotic agricultural chemicals and nitrogenous compounds by a mixed culture system" Proceedings of the 5th World Congress of Chemical Engineering. 2. 464-470 (1996)

X-HXing。