Hidetoshi Kitawaki

Researcher Profile and Settings

Education

•   1979  - 1984 , The University of Tokyo
•  - 1984 , The University of Tokyo, Graduate School, Division of Engineering
•   1975  - 1979 , The University of Tokyo, The Faculty of Engineering
•  - 1979 , The University of Tokyo, Faculty of Engineering

Association Memberships

• THE ASSOCIATION OF RURAL PLANNING
• JAPAN SOCIETY OF MATERIAL CYCLES AND WASTE MANAGEMENT

Academic & Professional Experience

•   1997 , - Toyo University, Professor
•   1992  - 1996 , The University of Tokyo
•   1992  - 1996 , The University of Tokyo, Visiting Associate Professor
•   1996 , - Toyo University, Professor
•   1990  - 1992 , Division of Environmental Health, WHO/HQ
•   1984  - 1990 , Nippon Jogesuido Sekkei Co. Ltd.

Research Activities

Research Areas

• Social infrastructure (civil Engineering, architecture, disaster prevention), Civil engineering (environmental systems)

Research Interests

Environmental Sanitation

Published Papers

• A Study on Septage Management Efficiency in Developing Countries, Pierre J-B. L. Flamand, Hidetoshi Kitawaki, Xinbi Yang, Satoru Takahashi, The 11th IWA Conference on Small Water & Wastewater Systems and Sludge Management, The 11th IWA Conference on Small Water & Wastewater Systems and Sludge Management, 10
• Lessons Learned from Three Decades of Japan's ODA Experiences in Municipal Solid Waste Management, Hidetoshi Kitawaki, 2011 World Congress of Intil Solid Waste Association, 2011 World Congress of Intil Solid Waste Association, 11 - 18, Invited
• ARSENIC REMOVAL MONITORING FROM GROUNDWATER IN A VILLAGE IN BANGLADESH WITH GUAVA METHOD, Md. MAFIZUR Rahman, Hidetoshi KITAWAKI, Bo Wang, Yoshiaki TSUZUKI, Journal of Global Environment Engineering, Journal of Global Environment Engineering, 15, 61 - 68, 02
• Study on Aceh Recovery Process in the perspective of "Build Back Better" defind in SFDRR, KITAWAKI Hidetoshi, Refereed

Misc

• Inpact of Ground Water Depth on Arsenic and Iron Correlation in Bangladesh:GIS Approach, Fahim Nawroz Tonmoy, Md.Mafizur Rahman, Hidetoshi Kitawaki, International Journal of Applied Environmental Sciences, 4, (4) 437 - 458,   2009
• Common Problems in Water Supply and Sanitation in Developing Countries, International Review for Environmental Strategies, 3, (2) 264 - 273,   2002
• Application of low-pressure nanofiltration coupled with a bicycle pump for the treatment of arsenic-contaminated groundwater, JI Oh, K Yamamoto, H Kitawaki, S Nakao, T Sugawara, MM Rahman, MH Rahman, DESALINATION, 132, (1-3) 307 - 314,   2000 12 , A nanofiltration (NF) membrane process coupled with a bicycle pumping system was examined by using arsenic-contaminated tube well water in a rural area of Bangladesh. It was operated under the conditions of low recovery and low operational pressure. It was proposed using both permeate and concentrate of NF membranes for drinking water and smother purpose. Rejection characteristics of arsenic compounds such as arsenite [As(III)] and arsenate [As(V)] were also investigated. Arsenite, a neutral solute at pH 8, showed lower rejection than arsenate, which existed in ionized forms at pH 8. In this sense the pre-oxidation of arsenite to arsenate was necessary to obtain safer drinking water using the NF process. Furthermore, the reverse osmosis (RO) process could be operated under the conditions of high operational pressure at 4MPa by using a bicycle pedal pump. Rejection of arsenite and arsenate with the RO membrane was over 95%. However, treatment of concentrate with a high concentration of arsenic might be necessary for the application of the RO process where recovery was obtained at 66%. A high recovery of 66% was delivered at three times a higher concentration of arsenic in concentrate than feed water. Consequently, a low-pressure NF process with the pre-oxidation of arsenite to arsenate or the RO process coupled with a bicycle pumping system could be applied to the treatment of arsenic-contaminated groundwater in areas where electricity supply is not efficient or feasible.

  DOI
• Modeling of arsenic rejection considering affinity and steric hindrance effect in nanofiltration membranes, JI Oh, T Urase, H Kitawaki, MM Rahman, MH Rhahman, K Yamamoto, WATER SCIENCE AND TECHNOLOGY, 42, (3-4) 173 - 180,   2000 , Rejection characteristics of arsenic compounds such as arsenite, dimethyl arsinic acid, and arsenate were examined regarding the effect of pH change in nanofiltration. Rejection mechanism of arsenic compounds was explained by comparing experimental rejection with calculation of the Extended Nernst-Planck model coupled with steric hindrance model. Nanofiltration membranes of the same material show similar rejection characteristics of arsenic compounds in different species. Steric hindrance and electrostatic effect in the nanofiltration membranes was well described by the model because the rejection of chloride, sulfate and arsenate ions, which exist in ionized forms at a wide pH range showed quite good agreement between model calculation and experimental result. The rejection of dimethyl arsenic acid and arsenite required the consideration of mutual interaction between membrane material and solutes as well as steric hindrance and electrostatic effect. A system with ultra low-pressure nanofiltration membrane coupled with pre-oxidation device was suggested for the treatment of arsenic in groundwater in Bangladesh.
• Towards Effective Technical Cooperation in Water Supply and Sanitation, New Environmental Technologies for Sustainable Growth,   1995
• Willingness to pay for/use water supply and sanitation, A.K.M Nurul Islam, H.Kitawaki, Tokyo,Japan, M.H.Rahman, Dhaka,Bangladesh, AFFORDABLE WATER SUPPLY AND SANITATION,   1995
• Willingness to pay/luse for water supply/sanitation, Proceesings of the 20th WEDC Conference,   1994

Books etc

• Soil Environment
  Fuji Technosystem Co. Ltd.  1997
  URL
• Our Planee, Our Health
    1993
  URL

Conference Activities & Talks

• Willingness to pay/use for water supply and sanitation, 20th WEDC Conference,   1994

Research Grants & Projects

• A study on water supply in developing countries
• A study on Solid waste management in developing countries
• A study on the improvement of environmental sanitation in developing countries