News & Events  

September 12, 2023

Maezawa’s technology adopted Mlit Japan’s Sewerage Technology Overseas Demonstration Project WOW TO JAPAN

Unit Type Automatic Chain Screen
Unit Type Automatic Chain Screen

Maezawa had proposed "Demonstration Project using Unit Type Automatic Chain Screen" and has been selected for the sewerage technology overseas demonstration project FY2023 (WOW TO JAPAN Project). 


The “WOW TO JAPAN” is a project promoted by Mlit Japan (Ministry of Land, Infrastructure, Transport and Tourism).  The goal of this project is to verify the applicability and effectiveness of Japanese technology to meet overseas needs through demonstration tests.  In addition, it aims to enhance understanding of the technology among local officials and disseminate Japanese sewerage technology.  


The demonstration is scheduled from August 2023 to March 2024 and held in Kingdom of Thailand. In this demonstration test, Maezawa’s high corrosion resistant “Unit type Automatic Chain Screen”, which has a proven track record in combined sewerage system, will be operated under the same conditions as the existing Screen that had failed.  To verify the possibility of operation without failure and the foreign object avoidance mechanism which is feature of the Screen.


Maezawa aims to promote understanding the importance of selecting a Screen suitable for combined sewerage system in Kingdom of Thailand, disseminate and develop the use of “Unit Type Automatic Chain Screen” in the sewerage business in Kingdom of Thailand through this demonstration test.

Uploaded a video of Dual DO Control system

Our “Dual DO control system for Oxidation Ditch Process High efficiency and energy saving OD method” is out on YouTube. The feature of this advanced treatment technology is introduced in about 9 minutes. Please check it out.

Visit us at our booth P27 in VietWater2022

Maezawa Industries, Inc. is going to participate in VietWater2022 held in Saigon Exhibition & Convention Center (SECC), Ho Chi Minh City between November 9th to 11th to showcase following products.


・Oxidation Ditch nitrogen removal system by dual Dissolved Oxygen control

・Pin-Rack Screen unit

・LO-TM Control valve

・Muddy-hi eccentric valve

・Quick air valve

・Emergency Shutoff Valve (ESOV)


Booth No. P27, c/o KOWBA booth.

Venue: Saigon Exhibition & Convention Center (SECC), 799 Nguyen Van Linh, District 7, Ho Chi Minh City

Show Days: November 9th to November 11th, 2022

Opening Hours: 9:00 – 17:00 (9th and 10th), 9:00 – 16:00(11th)

B-MBR demonstration experiment underway in Saitama Prefecture

In July 2019, the New Energy and Industrial Technology Development Organization (NEDO) assigned Maezawa Industries, Inc.(Maezawa), Hokkaido University, and Chuo University to conduct its demonstration project under NEDO's Strategic Energy Conservation Technology Innovation Program. Maezawa and two universities have developed an energy-saving baffled membrane bioreactor (B-MBR), which can significantly reduce water treatment power consumption. Maezawa constructed an experimental facility with a treated water volume of approximately 400 m3/day at the Nakagawa Water Recycle Center of the Nakagawa Basin Sewerage System in Saitama Prefecture December 2019. Demonstration experiments of B-MBR are scheduled to be conducted from July 2020 to March 2022.

 A video introducing a part of this development has been released by Am-Team, a Belgium-based company ( Am-Team specializes in computational fluid dynamics (CFD) and is providing CFD services for our B-MBR development.

Maezawa Industries’ proposal in 2020 to the NEDO's "International Demonstration Project for Japanese Technologies Contributing to Efficient Energy Consumption (Preliminary Survey)" has been approved

 Maezawa Industries' proposal, the "Demonstration Study of a High-Quality Industrial Water Supply System to Realize Energy-Saving in Industrial Estates (Thailand)/ Preliminary Survey," was adopted at the public invitation of the National Research and Development Organization of New Energy and Industrial Technology Development Organization (NEDO) for the fiscal year 2020 as a part of the "International Demonstration Project for Japanese Technologies Contributing to Efficient Energy Consumption (Preliminary Survey)", initiated by NEDO.
 Maezawa Industries (Maezawa) has concluded a Memorandum of Cooperation (MOC) on High-Quality Industrial Water Supply with AMATA CORPORATION PCL (AC) and AMATA WATER CO. (AW), LTD. in the Kingdom of Thailand. Maezawa will conduct survey activities as one of the specific actions based on the MOC.
 In cooperation with AC and AW, Maezawa will clarify the possibility of "energy conservation and reduction of environmental burdens in the entire supply area" by supplying high-quality industrial water to the Amata City Chonburi Industrial Estate, operated by AC. Through the outcome of this study, Maezawa will carry out detailed studies for future commercialization.
NEDO website
Content of Public Submission(Japanese):         
Result of Adoption(Japanese):

Maezawa wins the STI for SGDs award of excellence

 Maezawa Industries, Inc., as one of the members of industry-government-academia collaboration team, has been awarded the excellent award of  “Science, Technology and Innovation(STI) for SDGs Award" by Japan Science and Technology Agency (JST) on Nov. 15, 2019 at the ceremony held in Tokyo. The collaboration team, which includes Kochi University, Konan City of Kochi Prefecture, Japan Sewage Works Agency and Maezawa, developed new sewage treatment technology “Oxidation Ditch (OD) nitrogen removal system by dual Dissolved Oxygen (DO) control” which can control aeration and water circulation independently.


 In this collaboration project, the demonstration at Noichi Sewage Treatment Center in Konan City shows that this technology can save the treatment cost, especially the power consumption by one third with optimal DO control that reduces the air flow and also by squeezing the treatment time. Based on this result, the technology was introduced in two treatment facilities in the city as well as applying to other areas. This technology could improve sustainability of sewage treatment in local cities which are facing population decline.

 It is the third time that the new technology “Oxidation Ditch (OD) nitrogen removal system by dual Dissolved Oxygen (DO) control” which was developed in the project received award following Grand prize in the 8th Junkan no Michi Wastewater System Prize (FY2015) and Technology prize by Japan Society on Water Environment (FY2015).

 Please refer “Our Wastewater Treatment Technology


 The award committee highly evaluated the demonstration of the effectiveness of the technology and its nationwide expansion for the use and deployment of STI. The committee also appreciated the cooperation among industry, government and academia could lead to practical use of the diligently developed technology. Furthermore, its contribution to improvement of sewage treatment capacity and creation of sustainable city are also highly evaluated.


 The “STI for SDGs” award, established in 2019, honors excellent project for resolving social problems with Science, Technology and Innovation (STI), and encourages further development and expansion of the project in order to contribute to accomplish SDGs. Please refer to JST’s website(Japanese) for further details.

Signing Ceremony of the Memorandums with Amata Group and Sirindhorn International Institute of Technology

 Maezawa Industries, Inc. (Maezawa) has agreed with Amata Corporation PCL (Amata Group) and Amata Water Co., Ltd. to extend the existing Memorandum of Cooperation (MOC) on the High-Quality Industrial Water Supply for three years on June 10, 2019.
 Amata Group initiated a new project, Amata Smart City, last year, which plans to turn the existing industrial estates into smart and innovative ones. Since then, the parties have been working on reducing the environmental load from the existing water treatment plants in the existing industrial areas in addition to the High-Quality Industrial Water supply to the new smart area.

Under the MOC, the parties would like to reduce energy consumption using Maezawa's "Hybrid Membrane System" technology.

 In addition to the MOC with Amata Group, Maezawa and Sirindhorn International Institute of Technology (SIIT) agreed at SIIT on June 11, 2019, to extend the existing Memorandum of Agreement (MOA) on the study of high-quality water produced by "Hybrid Membrane System" for three years. Both parties had made several academic presentations at several international conference organized by the International Water Association, based on the research results obtained from the on-site pilot plant experiments in Amata City Chonburi Industrial Estate.

 Under the extended MOA, the parties would like to address technical issues through its collaborative research works, to promote Maeawa’s activities in Thailand.

Sponsor to Agro’2019 Symposium, Greece

It is an honor for Maezawa Industries, Inc. (Maezawa) to be one of the sponsors of the International Water Association’s Agro 2019 Symposium (IWA Agro 2019) which takes place in Rhodes, Greece, June 19-21, 2019.

Maezawa is going to present its “Oxidation Ditch (OD) nitrogen removal system by dual Dissolved Oxygen (DO) control” and hopes that our technology works for all conference participants to improve wastewater treatments.

The Presentation at IWA Diffuse Pollution Conference

 “3rd Regional IWA Diffuse Pollution Conference” was held on November 19-22, 2018 in Chiang Mai, Thailand. At this conference, Dr. Miyoshi presented the research results on industrial water treatment: “Influence of aeration schemes on fouling control in hybrid microfiltration membrane system". The presentation was co-authored by Y. Takahashi, L. Zhang (Maezawa Ind. Inc., Japan), R. Nitisoravut (Sirindhorn International Institute of Technology Thammasat University, Thailand), and C. Polprasert (Thammasat University, Thailand). In this presentation, we reported that the continuous aeration is more economically attractive than intermittent aeration for controlling membrane fouling in our hybrid microfiltration membrane system.

[Announcement] The Presentation at IWA conference about New Membrane Technology

“IWA Regional Conference on Opportunities for Water Reuse in Southeast Asia” will be held at Phuket Thailand Oct. 30 – Nov. 2, 2018. At this conference, we will provide the latest progress on a new membrane system. The title of our presentation is “Energy consumption in baffled membrane bioreactor (B-MBR).”

The B-MBR does not require a recirculation pump and a mixer in the anoxic tank for promoting nitrification and denitrification. Therefore, energy consumptions associated with these apparatuses can be reduced by utilizing the B-MBR concept. In our presentation, the results of the estimation on specific energy consumption during B-MBR operation will be presented.

New Membrane Technologies presented at IWA conference in Singapore

Dr. Miyoshi presented two new membrane technologies at 8th IWA Membrane Technology Conference & Exhibition for Water and Wastewater Treatment and Reuse, which was held 5 September 2017 in Singapore.


One is about industrial water treatment titled: "Treatment of highly-colored surface water by combination of ion exchange and hybrid microfiltration membrane filtration system". The presentation was co-authored by Y. Takahashi, T. Suzuki (Maezawa Ind. Inc., Japan), R. Nitisoravut (Sirindhorn International Institute of Technology Thammasat University, Thailand), and C. Polprasert (Thammasat University, Thailand).


Another is about nitrogen removal from wastewater titled: "Factors affecting nitrogen removal in baffled membrane bioreactor (B-MBR) ". This presentation was co-authored by T. Tsumuraya, T.P. Nguyen (Maezawa Ind. Inc., Japan), and K. Kimura, Y. Watanabe (Hokkaido University, Japan).

Signing Ceremony of the MOU on Cooperation Agreement Extension with Amata Group

On June 20, 2016(Monday), Maezawa signed a MOU to extend "Memorandum of Cooperation on High Quality Water Supply " with Amata Corporation (Amata) and Amata Water, at the Amata Service Center of Amata Nakorn Industrial Estate.


The MOU extends the expiration date of the Agreement from May 2016 to May 2019, aiming to promote the continuation of future cooperation, in order to achieve a high-quality industrial water supply business for Amata Science City, which has been studied thus far.

During the signing ceremony, Maezawa's Managing Director, Mita, reported about the achievements of the last three years. Mr. Viboon Kromadit, Chief Marketing Officer for Amata Corporation, said "We are very happy about the achievements of the study thus far. I believe that the efforts of Amata and Maezawa always succeed." Finally, Maezawa’s President, Matsubara, expressed his aspirations: "Over the past three years, the project has advanced so far as to be considered one step away from realization. In addition, very high evaluation and expectations will have been requested from NEDO, which has provided assistance, we intend to make further efforts toward the commercialization to be implemented during the three-year period of the extension. "

Signing Ceremony of the MOU on Partnership Agreement Extension with SIIT

On June 21, 2016(Tuesday), Maezawa signed a MOU to extend the Memorandum of Understanding on "the Study of High Quality Water Produced by the Hybrid MF Membrane System" with Thammasat University Sirindhorn International Institute of Technology (SIIT). Pursuant to the MOU, the expiration date of the Agreement will be extended to May 2019.


SIIT is collaborating on a survey, and has provided valuable advice based on the latest information concerning the water business in Thailand, for consideration of a high-quality industrial water supply business.

During the greeting session of the signing ceremony, Dr. Somnuk Tangtermsirikul (Professor), Director of SIIT, said "In addition to the joint study that is currently being conducted, we will provide full cooperation for Maezawa’s commercialization study in Thailand, such as cooperation with respect to pilot plant experiments." Maezawa's President, Matsubara, said "We strongly believe that we will continue the existing friendly relationship in the future." Both sides confirmed that they would continue further cooperative efforts.

Agreement on mutual cooperation of "Saitama Overseas Sewerage Association"

On February 24, 2016, Maezawa Industries, Inc. as a member of "Saitama Overseas Sewerage Association” signed an agreement on mutual cooperation among the members: Saitama Prefecture Public Sewerage Works Bureau, The Associated General Contractors of Saitama Japan, Saitama Construction Consultants Technical advancement Association and Saitama Sewerage facility Maintenance Management Association.


The purpose of this association is to promote the project: "The Technical Assistance of Sewerage Technology in Collaboration with Public and Private Sectors in Thailand ". This project is a part of JICA's Partnership Program, and operated by Saitama Prefecture Public Sewerage Works Bureau. The period of the project is from February 24, 2016 to January 31, 2019.


By aggressively joining the activities in Thailand and cooperating with members of this association, we aim to strengthen our overseas business.