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

在生物废水处理过程中，通常通过有氧微生物去除有机化合物，而有氧硝化和厌氧硝化剂的结合可以去除硝酸物质。硝化物进行的硝化作用将氨转移到亚硝酸盐和硝酸盐，而硝酸化将氮氧化物降低到硝酸盐气体。本研究旨在通过多孔颗粒载体中有氧和厌氧微生物的共处来开发有效的生物学过程，以同时去除废水中的有机和氮物质。这项研究清楚地表明了与同时去除有机和氮物质有关的因素，并奠定了开发这种过程的工程基础。在本研究中获得的研究结果总结如下。使用模型的生物反应器，该模型的生物反应器具有确定厚度的多孔片，对多孔片中微生物物种的空间分布进行了分析。有机氧化细菌，硝化物和分解剂在多孔片中显示出独特的分布模式。提出了一种数学模型，考虑了微生物生长和死亡动力学，并成功地解释了微生物分布。这些结果表明，可以人工形成有氧和厌氧微生物的同居。为了获得基本的工程数据，以简单去除废水中的有机和氮物质，这是一种连续流动流化的生物反应器，由多孔的颗粒载体构建由多孔载体来处理，以治疗艺术污水处理。反应器是通过用Sparger（DO = 6-7ml/L）充气进行有氧操作的，并在8H的水压保留时间连续喂食污水。废水浓度与氮浓度（c/n比）的比率从2.5到10不等。在稳态状态下，总氮的去除率从50％增加到55％，而在影响氮浓度的情况下，c/n比c/n的比率= 20 mg/l，而在影响氮的浓度= 40％的情况下，n nity nitr = 40 mg/l = 40 mg/l nitr = 40 mg/l C/N比基于实验结果，对与有机和氮的同时去除相关的微生物反应进行了动力学分析。获得了普通C氧化，硝化和硝化的速率常数，并发现取决于有机负荷和影响氮的浓度。在低c/n比时，硝化化很大程度上有助于去除氮，而去除氮主要取决于在高C/N比下微生物生长的氮摄取。较少的

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。