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Hybrid Municipal Wastewater Treatment System With Pre-Coagulation/Sedimentation
Watanabe, Yoshimasa,Itonaga, Takanori 한국공업화학회 2004 Journal of Industrial and Engineering Chemistry Vol.10 No.1
Since the major part of the contaminants in municipal wastewater is associated with particles, direct particles separation is an effective way of lowering the wastewater contaminants. This paper deals with the performance of the hybrid municipal wastewater treatment system consisting of pre-coagulation/sedimentation and post-biological oxidation process. Rotating biological contactor and membrane bio reactor are used as biological oxidation process.
SIGNIFICANCE OF BIOTECHNOLOGY FOR ENVIRONMENTAL PROTECTION
Watanabe,Yoshimasa 嶺南大學校 環境問題硏究所 1991 環境硏究 Vol.10 No.2
From the presented arguments it appears that Environmental Biotechnology can contribute significantly to the avoidance and diminishing of Environmental problems. However it has also been shown that. - Environmental Biotechnology is only one other available technologies. - Development of new technologies is lengthy ( 5-10 years ) and costly.
CHARACTERISTICS OF BIOFILM SYSTEM IN ROTATING BIOLOGICAL CONTACTORS
Yoshimasa Watanabe,Sumio Masuda,Kiyoshi Nishidome,Masayoshi Ishiquro 嶺南大學校 環境問題硏究所 1989 環境硏究 Vol.8 No.2
The biofilm system in Rotating Biological Contactors (RBCs) consists of thebiofilm, an attached-water film, and the air phase during the rotation through the air. It consists of the biofilm, a diffusion layer, and bulk water during the rotation through the water. This paper deals with experimental investiqations to determine the diffusion layer thickness and measure the biofilm properties, such as the biofilm thickness, biofilm density, and intrinsic reaction rates within the biofilm. The biofilm. The following results were obtained: Diffusion layer thickness was inversely proportional to the root of the disk rotating speed, but was not a function of disk size, if the flow near the disk surface was laminar. It was also influenced by the subumerged ratio of the disk and protrusions of the disk surface. The measurement of biofilm properties snowed that a biofilm treating domestics sewage was divided into three parts depending on its density. Hower, intrinsic organic oxidation, nitrification, and denitrification rates per unit of the biomass were almost the same through the biofilm.
Identification of Nonlinear Dynamics of Aircraft via Nonlinear Programming
Nobuhiro Yokoyama,Yoshimasa Ochi,Masahito Watanabe 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-
This paper describes a new method for the identification of aircraft dynamics which is expressed by nonlinear state and observation equations with unknown parameters. The developed method adopts a nonlinear programming technique incorporated with the direct collocation, and accounts for both process and measurement noise through maximizing a likelihood. One of the advantages of the developed method is its stable convergence due to circumventing the recursive integration of state equations. The other advantage is its flexibility to handle wide-range of problems without software modifications. The developed method even covers the problem including equality or inequality conditions on unknown parameters and those with multiple flight test data. The effectiveness of the developed method is demonstrated by applying it to a simple benchmark problem to identify an unknown parameter of a reentry body and to a problem to identify the nonlinear dynamics of a paraglider based on multiple flight test data.